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Sanitary Sewer Management Plan
City of Poway Sanitary Sewer Management Plan Updated 2019 CITY OF POWAY GOALS City of Poway SSMP 1 Section 1.0 Goals Sanitary Sewer Management Plan (SSMP) Section 1.0 Goals The goals of the City of Poway’s SSMP are to: 1. Properly manage, operate, and maintain all portions of the City of Poway’s wastewater collection system to minimize Sanitary Sewer Overflows(SSOs); 2. Provide adequate capacity to convey peak wastewater flows; 3. Minimize the frequency of SSOs; 4. Mitigate the impacts that are associated with any SSOs that may occur; and 5. Meet all applicable regulatory notification and reporting requirements. CITY OF POWAY ORGANIZATION City of Poway SSMP 1 Section 2.0 Organization Sanitary Sewer Management Plan (SSMP) Section 2.0 Organization Name of the responsible or authorized representatives: 1. Rudy Guzman, Assistant Director of Public Works for Utilities a. (858) 668-4750 b. rguzman@poway.org 2. Terry Zaragoza, Wastewater Utilities Supervisor a. (858) 668-4719 b. tzaragoza@poway.org See Public Works Wastewater Collection Organization Chart, Exhibit 1. NOTIFICATION During regular working hours, the Wastewater Collection staff is notified of overflows by the public or a City staff member. Reports called in to the Public Works Administration Office are immediately reported to the Wastewater Utilities Supervisor. During off-duty hours, reports of overflows are called in to the City of Poway’s Lester J. Berglund Water Treatment Plant (Water Treatment Plant). The staff at the Water Treatment Plant immediately contact and dispatch the on-call Emergency Response Technician (ERT) and Wastewater Utilities Supervisor is notified. IMMEDIATE ACTION During regular work hours, Wastewater Collection staff and a Vactor truck are immediately dispatched to the scene to contain the Sanitary Sewer Overflow (SSO) and clear the blockage. Additional recovery crews are dispatched as needed. During off-duty hours, the standby employee responds and calls out crews as needed. The Wastewater Utilities Supervisor is called as soon as possible. An additional Vactor is dispatched for containment as needed. GUIDELINES The City of Poway implements all remedial actions to the extent that they are applicable to the discharge, including the following: • Interception and rerouting of sewage flows around the sewage line failure; • Vactor truck containment/recovery of sanitary sewer overflows and wash down water; • Use of portable aerators where complete recovery of the SSO is not practicable and where severe oxygen depletion in existing surface waters is expected; and • Cleanup of debris of sewage origin at the overflow site. City of Poway SSMP 2 Section 2.0 Organization Removal of the blockage is the first priority, followed by efforts to contain and recover the overflow. The affected area is disinfected and receives a wash down. All wash downs are contained and recovered by a Vactor. All line segments involved in the overflow are inspected by the division’s Closed Circuit Televised Video (CCTV) crew. Bilingual warning signs may be posted depending upon the boundaries of the spill. Notification is performed immediately after clearing the blockage and posting the affected areas. Notification is conducted in accordance with the attached procedures and overflow report form (Exhibits 2, 3). City of Poway Public Works Wastewater Division Sewer Overflow Prevention Plan Contact Information Office # 858-668-4783 Radio Moniker: Util 04 Radio Moniker: Sugar 07 Wastewater Utilities Crew Leader Chad Fried (LRO) Cell # 858-243-8438 Radio Moniker: Sugar 02 Wastewater Utilities Crew Leader Amjad "MJ" Mohamad Cell # 858-395-1609 Radio Moniker: Sugar 03 Wastewater Utility Worker I Chad Weigel Irving Echeverria Vernon Fitzpatrick Radio Moniker: Sugar 05 Radio Moniker: Sugar 06 Wastewater Utilitiy Worker I Ivan Martinez Radio Moniker: Sugar 04 Wastewater Utility Worker I Wastewater Utility Worker I Office # 858-668-4719 Cell # 858-243-5616 Radio Moniker: Sugar 01 City of San Diego SSMP Contact Infromation Central Operations Management Center Staffed 7-24 for SPS and Flow Meter Alarms Contact # 858-614-4551 Wastewater Utilities Supervisor Office # 858-668-4754 Radio Moniker: Util 01 Cell # 760-703-4770 Terry Zaragoza (LRO) Utilities System Supervisor Frank Dumbrique Administrative Assistant III Kathy Makepeace Office: # 858-668-4715 Radio Moniker: Station Bravo Cell # 760-420-5571 Radio Moniker: Admin 03 Jason Rice Office # 858-668-4756 Radio Moniker: Util 06 Director of Public Works Mike Obermiller Office # 858-668-4722 Radio Moniker: Admin 01 Gil Aguilar Office # 858-668-4758 Radio Moniker: Util 05 Utility Systems Mechanic Office # 858-668-4755 Radio Moniker: Util 02 Assistant Director of Public Rudy Guzman Office # 858-668-4750 City Engineer Tom Frank Office # 858-668-4603 Radio Moniker: Util 03 Utility Systems Mechanic Sr. Utility Systems Tech After Hours Emergency Response Contact Water Treatment Plant Operator Office # 858-668-4751 Radio Moniker: Station Tango Tom Moylan Sr. Utility Systems Mechanic Barry Medlin Office # 858-668-4762 Sr. Utility Systems Tech Chau "Donny" Tran Office # 909-825-7693 Fax # 909-825-7696 Dispatch Center for Emergencies Clinical Laboratory of San Bernardino Inc. Additional Monitoring Laboratory Contact Robin Glenney Station 38 (06:00 - 23:00) Contact # 619-515-3525 Fire Dispatch (23:00 - 06:00) Contact # 858-974-0275 Exhibit 1 Updated May 2019 [Type here] Exhibit 1A Updated May 2019 City of Poway Public Works Wastewater Division Sewer Overflow Prevention Plan Organization Chart SSMP Roles Director of Public Works: Oversees, directs, and participates in all activities of the Public Works Department, including short- and long-term planning development and administration. Assistant Director of Public Works for Utilities: Manages the operations, maintenance, repair and regulatory compliance of the City’s wastewater collections and related facilities. City Engineer: Oversees, directs, and participates in all engineering activities and programs of the Development Services Department, including Capital Improvement Program design, construction, and inspection of wastewater related facilities. Wastewater Utilities Supervisor: Supervision, planning, organizing, reviewing, and evaluating work of wastewater utilities collection system maintenance division maintenance and operations. Oversees emergency response, investigates and reports SSO’s and trains field staff. This position also serves as a Legally Responsible Official (LRO). Wastewater Utilities Crew Leader: Advanced journey-level staff leading field crews and participating in the most complex duties during maintenance, operations, and emergency response activities. Responsible for performing SSO spill volume investigations and reporting. This position also serves as a Legally Responsible Official (LRO). Wastewater Utilities Worker I/II: Entry and journey-level respectively performing routine preventative maintenance activities, mobilizing and responding to blockages and SSO’s. Utility Systems Supervisor: Supervision, planning, organizing, reviewing, and evaluating work of utilities systems sewer lift station maintenance division maintenance and operations. Oversees emergency response and investigates SSO’s. Sr. Utility Systems Technician: Performs electrical, electronic, PLC programming, Spread spectrum radio communications and a SCADA monitoring/maintenance as they relate to sewer lift stations. Responds to and investigates emergency related issues. Utility Systems Mechanic: Performs operation, maintenance, and repair activities related to the sewer lift stations. Responds to and investigates emergency related issues. Exhibit 2 Regulatory Reporting Guide Detailed information on each SSO is submitted by enrollees in the SSO report. Enrollees are required to report all SSOs that result from a failure or flow condition in any portion of a sanitary sewer system under their ownership or management. For the purposes of reporting, SSOs fall into one of the three categories: Category 1, Category 2, and Category 3. The definitions for each Category are listed in Table 1, below. CATEGORIES DEFINITIONS Category 1 Discharges of untreated or partially treated wastewater of any volume resulting from an enrollee's sanitary sewer system failure or flow condition that: Reach surface water and/or reach a drainage channel tributary to a surface water; or Reach a municipal separate storm sewer system and not fully captures and returned to the sanitary sewer system or not otherwise captured and disposed of properly. Any volume of wastewater not recovered from the municipal separate storm sewer system is considered to have reached surface water unless the storm drain system discharges to a dedicated storm water or ground water infiltration basin (e.g., infiltration pit, percolation pond). Category 2 Discharges of untreated or partially treated wastewater of 1,000 gallons or greater resulting from an enrollee's sanitary sewer system failure or flow condition that do not reach surface water, a drainage channel, or a municipal separate storm sewer system unless the entire SSO discharge to the storm drain system is fully recovered and disposed of properly Category 3 All other discharges of untreated or partially treated wastewater resulting from an enrollee’s sanitary sewer system failure or flow condition. Private Lateral Sewage Discharge (PLSD) Discharge of untreated or partially treated wastewater resulting from blockages or other problems within a privately owned sewer lateral connected to the enrollee’s sanitary sewer system or from other private sewer assets. PLSDs that the enrollee becomes aware of may be voluntarily reported to the SSO Database. Table 1 – Spill Categories and Definitions The reporting deadline for submittal of a SSO report depends on the classification of the spill as shown in Table 2. For Category 1 and 2 SSOs, the enrollee must submit an initial draft report of the SSO as soon as possible but no later than 3 business days after becoming aware of the SSO. The final, certified report for Category 1 and 2 SSOs must be submitted within 15 calendar days of the SSO end date. For Category 3 SSOs, the enrollee must submit a final, certified report (no initial draft report required) within 30 calendar days after the end of the calendar month in which the SSO occurred. For instance, if the SSO occurred on February 1st, the enrollee must certify the Category 3 SSO before March 30th . Exhibit 2 ELEMENT REQUIREMENT METHOD Notification Within 2 hours of becoming aware of any Category 1 SSO greater than or equal to 1,000 gallons notify the California Office of Emergency Services (Cal OES) and obtain a notification control number. Call Cal OES at: (800) 852-7550 Reporting Category 1 SSO: Submit Draft report within 3 business days of becoming aware of the SSO and certify within 15 calendar days of SSO end date. Category 2 SSO: Submit Draft report within 3 business days of becoming aware of the SSO and certify within 15 calendar days of SSO end date. Category 3 SSO: Submit Certified report within 30 calendar days of the end of month in which SSO occurred. “No Spill” Monthly Certification: Certify that no SSOs occurred within 30 calendar days of the end of the month in which no SSOs occurred. Collection System Questionnaire: Update and Certify every 12 months. Enter data into the California Integrated Water Quality System (CIWQS) Online SSO Database (http://ciwqs.waterboards.ca.gov/), certified by enrollee’s Legally Responsible Official(s). Table 2 – Notification, Reporting, Monitoring, and Record Keeping Requirements Notification of Cal OES is required within two hours of becoming aware of a Category 1 SSO greater than or equal to 1,000 gallons that results or may result in a discharge to surface waters. Specifically, the enrollee shall, as soon as possible, but no later than two (2) hours after (A) the enrollee has knowledge of the discharge, (B) notification is possible, and (C) notification can be provided without substantially impeding cleanup or other emergency measures, notify the California Office of Emergency Services (Cal OES) and obtain a notification control number. With the exception of enrollees in the San Diego region, Private Lateral Sewage Discharges (PLSDs) are not required to be reported, but they can be voluntarily reported to the database. The State Water Board encourages enrollees to Notify Cal OES for PLSDs greater than or equal to 1,000 gallons that result or may result in a discharge to surface waters. No-spill Certifications are required within 30 days after the end of each calendar month if there are no SSOs during the calendar month. If there are no SSOs during a calendar month but the enrollee reported a PLSD, the enrollee must still file a “No Spill” certification statement for that month. Sanitary Sewer Overflow (SSO) Reporting Flow Chart Did SSO occur? (See SSO Response Flowchart) Was the spill caused by a problem in the public sewer or on private property? If no SSOs occurred during the calendar month, submit “No Spill” Certification to CIWQS within 30 calendar days of the end of the month or, if reporting quarterly, the quarter in which no SSOs occurred.* END NO PRIVATE PUBLIC YES Private lateral sewage discharge (PLSD) 1. Did the spill discharge to a surface water or in a location where it will probably discharge to a surface water? 2. OR did the spill reach a storm drain and could not be completely recovered? Category 1 SSO YES Did the spill equal or exceed 1,000 gallons? Within 2 hours**, report spill by phone (800) 852-7550 to the California Office of Emergency Services (Cal OES) and obtain notification control number.*** Did the spill equal or exceed 1,000 gallons AND discharge to a surface water or in location where it may discharge to a surface water? Notify Cal OES (800) 852-7550 1. Did the spill reach surface waters or drainage channel? 2. OR did the spill reach a storm drain and could not be completely recovered? 3. OR did the spill equal or exceed 1,000 gallons? Did the spill equal or exceed 1,000 gallons? NO Category 2 SSO Category 3 SSO NO YES Call RWQCB within 24 hours** NO YES NO YES Did the spill equal or exceed 50,000 gallons? Submit certified report using CIWQS within 30 calendar days of the end of the calendar month in which SSO occurred. Within 48 hours after initial SSO notification, conduct water quality sampling. Upload water quality results into CIWQS. Submit draft report using CIWQS**** within 3 business days of becoming aware of SSO. Certify report within 15 calendar days of SSO end date. NO YES Submit draft report using CIWQS**** within 3 business days of becoming aware of SSO. Certify report within 15 calendar days of SSO end date. Submit SSO Technical Report within 45 calendar days after SSO end date. END Call RWQCB within 24 hours** If considered a health hazard, report to applicable agencies. Report using CIWQS within 30 days after the end of the calendar month in which spill occurred. NO YES NOTES *Per Order 2013-0058-EXEC, if there are no SSOs during a calendar month but a PLSD was reported, a “No Spill” certification statement for that month should still be submitted. **After the Sewage Collection Agency becomes aware of the SSO, notification is possible, and notification can be provided without substantial impeding cleanup or other emergency measures. ***If applicable, update Cal OES regarding substantial changes to the estimated volume of the spill and any substantial changes to known impact(s) after initial notification and before SSO report is certified. ****If CIWQS is not available for any reason, information must be faxed or emailed to the San Diego RWQCB according to the time frame. CITY OF POWAY LEGAL AUTHORITY City of Poway SSMP 1 Section 3.0 Legal Authority Sanitary Sewer Management Plan (SSMP) Section 3.0 Legal Authority Each Enrollee must demonstrate, through sanitary sewer system use ordinances, service agreements, or other legally binding procedures, that it possesses the necessary legal authority to: (a) Prevent illicit discharges into its sanitary sewer system. Reference Poway Municipal Code Chapters 13.04.170 and 13.05.270. (b) Require that sewers and connections be properly designed and constructed. Greenbook and City of Poway Engineering Standards. (c) Ensure access for maintenance, inspection, or repairs for portions of the lateral owned or maintained by the City of Poway. Reference Poway Municipal Code Chapters 13.04.160 and 13.05.100. (d) Limit the discharge of fats, oils, and grease and other debris that may cause blockages. Reference Poway Municipal Code Chapters 13.04.140 and 13.05.270. (e) Enforce any violation of its sewer ordinances. Reference Poway Municipal Code Chapter 13.04.240. Legal Authority Checklist Requirement Code Reference Public Sewers Ability to prevent illicit discharges into the wastewater collection system. Chapter 13.04 Sewer Regulations 13.04.170 Unlawful to make sewer connection without payment of fee Chapter 13.05 Industrial Wastewater Pretreatment Program 13.05.270 Prohibited discharges. Ability to require that sewers and connections be properly designed and constructed. Chapter 13.04 Sewer Regulations 13.04.050 Sewer service and connection conditions 13.04.190 Construction of sewer lateral Laterals Ensure access for maintenance, inspection, or repairs for portions of the service lateral owned or maintained by Enrollee. Chapter 13.04 Sewer Regulations 13.04.060 Right to inspect Chapter 13.05 Industrial Wastewater Pretreatment Program 13.05.100 FOG Source Control Requirements for the installation of GRD’s. Chapter 13.04 Sewer Regulations 13.04.140 Use of plumbing interceptors Chapter 13.05 Industrial Wastewater Pretreatment Program 13.05.270 Prohibited discharges. Authority to inspect grease producing facilities. Chapter 13.05 Industrial Wastewater Pretreatment Program 13.05.100 Ability to limit the discharge of FOG and other debris that may cause blockages. Chapter 13.04 Sewer Regulations 13.04.140 Use of plumbing interceptors Chapter 13.05 Industrial Wastewater Pretreatment Program 13.05.270 Prohibited discharges. Enforcement Ability to enforce any violation of Enrollee’s sewer ordinance. Chapter 13.04 Sewer Regulations 13.04.240 Violation – Penalty AGENDA REPORT SUMMARY TO Honorable Mayor and Members of the City Council if FROM Rod Gould City Manager INITIATED BY Kevin Haupt Director of Public Works 111 DATE October 16 2007 SUBJECT Approval of Development Plan and Schedule for a Sewer System Management Plan SSMP ABSTRACT On May 2 2006 the State Water Resources Control Board SWRCB adopted a General Waste Discharge Requirement WDR for all publicly owned sanitary sewer collection systems in California with more than one mile of sewer pipe The goal of the WDR is to provide a consistent statewide approach for reducing sanitary sewer overflows SSOs The final part of the WDR is that a Sewer System Management Plan SSMP with all the mandatory elements must be developed and approved by the collection system s governing body The first step in the SSMP requires that the development schedule be approved by the City Council This includes approval of the development of a schedule for completing all the elements of the SSMP within the required timelines determining the persons responsible for those elements and monitoring the progress ofthe SSMP development There are eleven required elements for the SSMP The SSMP must be delivered in sections to the Regional Water Quality Control Board beginning with the Development Plan and Schedule in November 2007 and ending with the finalized SSMP in August 2009 ENVIRONMENTAL REVIEW This action is not subject to CEQA review FISCAL IMPACT None PUBLIC NOTIFICATION AND CORRESPONDENCE None RECOMMENDATION It is recommended that the City Council approve the Development Plan and Schedule for a Sewer System Management Plan ACTION Approved staff recommendation 5 0 eX L Diane Shea City Clerk 1 of 5 October 16 2007 Item 5 0 I Olf C 1 CI E E y G Ttlis report is included on the Consent Calendar Tilere will be no separate discussion of the report prior to approvnl by the City Cou ncil unless members of the Council staff or public request it to be removed from the Consent Calendar and discussed sopamlcly Iryou wish 0 twve this report pulled for discussion plei1se fill out slip indicating the report number and give it to the City Clerk prior to Lhe beqinning of tile City Council meeting TO Honorable Mayor and Members 9f the City Council cFROMRodGouldCityManagert INITIATED BY Kevin Haupt Director of Public Works W kbTomHowardPublicWorksUtilitiesManager rBradVoorheesWastewaterUtilitervisorfl Robin Miller Management Analys DATE October 16 2007 SUBJECT Approval of Development Plan and Schedule for a Sewer System Management Plan SSMP BACKGROUND On May 2 2006 the State Water Resources Control Board SWRCB adopted a General Waste Discharge Requirement WDR for all publicly owned sanitary sewer collection systems in California with more than one mile of sewer pipe The goal of the WDR is to provide a consistent statewide approach for reducing sanitary sewer overflows SSOs The WDR requires that in the event of an SSO all feasible steps be taken to control the released volume and prevent untreated wastewater from entering storm drains creeks etc If an SSO occurs it must be reported to the SWRCB using an online reporting system developed by the SWRCB called the CIWQS or California Integrated Water Quality System The final part of the WDR is that a Sewer System Management Plan SSMP with all the mandatory elements must be developed and approved by the collection system s governing body The first step in the SSMP requires that the development schedule be approved by the City Council This includes approval of the development of a schedule for completing all the elements of the SSMP within the required timelines determining the persons responsible for those elements and monitoring the progress of the SSMP development Responsible staff members for the development and completion of the SSMP within the required timelines include Tom Howard Public Works Utilities Manager and Brad Voorhees Wastewater Utilities Supervisor 2 of 5 October 16 2007 Item 5 Staff Report Approval of Development Plan and Schedule for a Sewer System Management Plan SSMP October 16 2007 Page 2 FINDINGS There are eleven required elements for the SSMP 1 Goals The collection system agency must develop goals to properly manage operate and maintain all parts of its wastewater collection system in order to reduce and prevent sanitary sewer overflows SSOs as well as to mitigate any SSOs that occur The standards for the operation and maintenance of a wastewater collection system are to properly operate and maintain all portions of the collection system to report overflows and to respond effectively to any overflows that may occur The collection system goals should be at a level that meets the standards 2 Orqanization The collection system agency s SSMP must identify the following a The name of the responsible or authorized representative b The names and telephone numbers for management administrative and maintenance po sitionsresponsible for implementing specific measures in the SSMP program This il1c1ude lines of authority as shown in an organization chart or similar document with a narrative explanation and c The chain of communication for reporting SSOs from receipt of a complaint or other information including the person responsible for reporting SSOs to the SWRCB and the Regional Water Quality Control Board RWQCB and other agencies if applicable 3 Leqal Authority The collection system must demonstrate through collection system use ordinances service agreements or other legally binding procedures that it possesses the necessary legal authority to a Prevent illicit discharges into its wastewater collection system b Require that sewers and connections are properly designed and constructed c Ensure access for the maintenance inspection or repairs for portions of the lateral owned or maintained by the Public Agency d Limit the discharges of fats oils and grease and other debris that may cause blockages and e Enforce any violation of its sewer ordinances 4 Operations and Maintenance Proqram The SSMP must include those elements listed below that are appropriate and applicable to the collection system agency s system a Maintain an up to date map of the sanitary sewer system b Describe routine prevention operation and maintenance activities by staff and contractors including a system for scheduling regular maintenance and cleaning of the sanitary sewer system with more frequent cleaning and maintenance targeted at known problem areas c Develop a rehabilitation and replacement plan to identify and prioritize system deficiencies and implement short term and long term rehabilitation actions to address each deficiency 3 of 5 October 16 2007 Item 5 Staff Report Approval of Development Plan and Schedule for a Sewer System Management Plan SSMP October 16 2007 Page 3 d Provide training on a regular basis for staff in sanitary sewer system operations and maintenance and require contractors to be appropriately trained and e Provide equipment and replacement parts inventories including the identification of critical replacement parts 5 Desiqn and Performance Provisions a Design and construction standards and specifications for the installation of new sanitary sewer systems pump stations and other appurtenances and for the rehabilitation and repair of existing sanitary sewer systems and b Procedures and standards for inspecting and testing the installation of new sewers pumps and other appurtenances and for rehabilitation and repair projects 6 Overflow Emerqencv Response Plan The collection system agency shall develop and implement an overflow emergency response plan that identifies measures to protect public health and the environment 7 Fats Oils and Grease FOG Control Proqram The collection agency shall evaluate its service to determine whether a FOG control program is needed If fats oils and grease are found to be a problem the collection system agency must prepare and implement a FOG source control program to reduce the amount of these substances discharged to the sanitary sewer system 8 Svstem Evaluation and Capacitv Assurance Plan The collection system agency shall prepare and implement a capital improvement plan CIP that will provide hydraulic capacity of key sanitary sewer system elements for dry weather peak flow conditions as well as the appropriate design storm or wet weather event 9 Monitorinq Measurements and Plan Modifications The collection system s agency shall a Maintain relevant information that can be used to establish and prioritize appropriate SSMP activities b Monitor the implementation and where appropriate measure the effectiveness of each element of the SSMP c Assess the success of the preventative maintenance program d Update program elements as appropriate based on monitoring or performance evaluations and e Identify and illustrate SSO trends including frequency location and volume 10 SSMP Proqram Audits The collection system agency shall conduct periodic internal audits appropriate to the size of the system and the number of the SSOs At a minimum these audits must occur every two years and a report must be prepared and kept on file 11 Communication Proqram The collection system agency shall communicate on a regular basis with the public on the development implementation and performance of 4 of 5 October 16 2007 Item 5 Staff Report Approval of Development Plan and Schedule for a Sewer System Management Plan SSMP October 16 2007 Page 4 its SSMP The communication system shall provide the public the opportunity to provide input to the collection system agency as the program is developed and implemented The collection system agency shall also create a plan of communication with systems that are tributary and or satellite to the collection system agency s sanitary sewer system The SSMP must be delivered in sections to the RWQCB with the final sections due in 2009 Task Com letion Date SSMP DeveloJ2ment Plan and Schedule 11 1 2007 Section I Goals 5 1 2008 Section II Organization Section III Legal Authority 5 1 2009 Section IV Operation and Maintenance Program Section VI Overflow Emergency Response Plan Section VII FOG Control Program Section V Design and Performance Provisions 8 1 2009 Section VIII System and Evaluation and Capacity Assurance Plan Section IX Monitoring Measurements and Plan Modification Section X SSMP Program Audits Section XI Communication Program Final SSMP ENVIRONMENTAL REVIEW This action is not subject to CEQA review FISCAL IMPACT None PUBLIC NOTIFICATION AND CORRESPONDENCE None RECOMMENDATION It is recommended that the City Council approve the Development Plan and Schedule for a Sewer System Management Plan S of 5 October 16 2007 Item 6 CITY OF POWAY OPERATION AND MAINTENANCE PROGRAM City of Poway SSMP 1 Section 4.0 Operation and Maintenance Sanitary Sewer Management Plan (SSMP) Section 4.0 Operation and Maintenance (a) The following figures are up-to-date (GIS) maps of the sanitary sewer system showing all gravity line segments and manholes, pumping facilities, pressure pipes and valves, and applicable stormwater conveyance systems. Sewer Maintenance Books: Section 4a-1 (GIS Map) Lift stations and force mains: Section 4a-2 (GIS Map) Stormwater conveyance systems: Section 4a-3 (GIS Map) (b) Describe routine preventive operation and maintenance activities by staff and contractors, including a system for scheduling regular maintenance and cleaning of the sanitary sewer system with more frequent cleaning and maintenance targeted at known problem areas. The Preventative Maintenance (PM) program should have a system to document scheduled and conducted activities, such as work orders. Description of scheduled maintenance The Wastewater Collection Division’s scheduled operations and maintenance programs are based on related core functions: Vactor Jet-rodding program including monthly and quarterly High Frequency Flushing locations; CCTV mainline segment inspection; annual lateral inspections; annual manhole inspections; traffic control; crowd control; and chemical treating of mainlines with root infiltration and easement maintenance. These functions are scheduled daily, weekly, monthly, quarterly, and annually depending on the function and frequency required to ensure WDR compliance. List of high frequency cleaning areas The Wastewater Collection Division performs monthly maintenance on forty-two (42) High Frequency Flushing locations (Section 4b-1), cleaning 10,262 lineal feet of collection system pipeline, and quarterly maintenance on forty-four (44) High Frequency Flushing locations (Section 4b-2), cleaning 11,379 lineal feet of collection system pipeline. CartéGraph Asset Management Software The City of Poway Public Works Department utilizes the CartéGraph Operation Management Software Program to respond to requests, schedule tasks and work orders associated with performing the work performed by the wastewater division. The program is also used to inventory, plan, execute, and record the history of City of Poway SSMP 2 Section 4.0 Operation and Maintenance maintenance performed on collection system assets for further analyzing, aiding with future Capital Improvement Projects. Vactor Operations Trunk and Collector Line Maintenance (described) VACTOR JET-RODDING is the function of performing routine scheduled maintenance on the collection system utilizing high-pressure water equipment. This core function is performed daily by a two-man crew ensuring the collection system is clean of debris (i.e., rocks, roots, silt, grease, foreign objects) and free flowing to prevent potential sanitary sewer overflows. Jet-rodding is performed by inserting a high-pressure water nozzle from the accessed manhole to the upstream manhole and pulling the nozzle head back with the flow to the accessed manhole while maintaining a visual on the liquids and debris being pulled back. This process is continued until a visual indicates a free-flow and clean pipe. Two methods of collecting debris are either the use of a steel cage or the suction function of the equipment. The steel cage is used frequently to catch debris during the operation. Debris is caught in the cage and removed to the surface area and scooped up into trash bags for disposal. Caution is exercised for sharp objects during this operation. The suction function of the Vactor is the preferred method to use since a higher percentage of debris is captured in the spoils tank. This method is a little more time consuming and requires decanting of the liquids from the spoils tank to stay compliant with vehicle weight limitations. However, this is a safer way of capturing debris without handling it. Liquids are decanted and solids are transported to the Crosthwaite Materials Handling Yard and disposed of in the wastewater collection basin. The wastewater collection system has been reorganized and divided into three basins: north, central, and south. Each basin consists of collection systems within the main system. Each system has a starting point and termination manhole before flowing into another system. The Vactor suction function is incorporated at each termination manhole. Special care is taken in systems related to any of the five sewer lift stations. Treatment plant staff is notified when working on the system immediately impacts flows for a lift station and extra attention to the removal of debris at termination manhole. Vactor Response Protocol for Trunk and Collector Line Blockages PROTOCOL: The Vactor truck immediately responds to main line blockages detected during regular business hours by CCTV staff or other wastewater utilities staff performing work on the collection system. Mitigation of a blockage is first City of Poway SSMP 3 Section 4.0 Operation and Maintenance priority to prevent a potential SSO. Vactor truck staff documents footage location of blockage from downstream manhole and uses a cage in the manhole to collect cause of blockage. After a blockage is mitigated, the impacted main line is video inspected by CCTV staff to ensure a free-flowing system before the Vactor truck is released from the jobsite. Vactor Response Protocol for Trunk and Collector Line Partial blockages PROTOCOL: The Vactor truck immediately responds to partial main line blockages detected during regular business hours by CCTV staff or other wastewater utilities staff performing work on the collection system. Mitigation of a partial blockage is first priority to prevent a potential SSO. Vactor truck staff documents footage location of a blockage from the downstream manhole and uses a cage in the manhole to collect cause of blockage. After a partial blockage is mitigated, the impacted main line is video inspected by CCTV staff to ensure a free-flowing system before the Vactor truck is released from the jobsite. Vactor Response Protocol for Trunk and Collector Line SSO IMMEDIATE ACTION: During regular working hours, staff and a Vactor truck are immediately dispatched to the scene to clear a mainline blockage causing an SSO event. Containment and recovery crews are dispatched as needed. During off-duty hours, the standby employee responds and calls out crews as needed. A supervisor is notified as soon as possible. An additional Vactor is dispatched for containment as needed. PROTOCAL: Mitigation of a blockage is the first priority, followed by containment efforts and 100% recovery of an SSO. Debris and liquids are recovered from the affected area and returned to the sewer system. Wash downs of the affected area are contained and recovered by a Vactor. All line segments involved in the overflow are inspected by the division’s CCTV crew. Bilingual warning signs may be posted depending upon the boundaries of the spill. Notification is performed immediately after clearing the blockage and posting the affected areas. Notification is conducted in accordance with the State Water Resources Control Board’s guide for Sanitary Sewer Overflow Reduction Program, Cal OES, and the San Diego County Health Department. CCTV Operations Trunk and Collector Line Maintenance (described) City of Poway SSMP 4 Section 4.0 Operation and Maintenance VIDEO INSPECTION (CCTV) is the function of performing scheduled routine video inspection of the wastewater collection system utilizing mainline video inspection equipment. This core function is performed daily by a two-man crew validating the efficiency and effectiveness of the jet-rodding program identifying pipe defects, grease, roots, and infiltration of groundwater into the system. The City utilizes the Cues GraniteNet Asset Inspection/Decision Support Software program and equipment to provide recorded video inspections, still pictures, and reports related to the collection system. The video equipment has the ability to perform inspections from upstream manholes to downstream manholes and perform multiple inspections from one location. The primary operator is stationed in the vehicle operating the equipment and software program performing a visual inspection and condition of pipe, noting the findings on the recorded video. The secondary operator is located in the rear of the vehicle at the accessed manhole. He will lower the camera into position in the mainline and communicate with the primary operator during operation. After the video inspection is completed, the secondary operator will safely remove the camera from the manhole using a series of extension poles with a hook attached to the end, clean the camera, and secure it in the vehicle for transport. Due to the depth of manholes and the weight of the video equipment, proper lifting techniques shall be followed to protect employees. The video inspection performed for the day is loaded onto the City server at the end of each shift. The stored information shall be categorized in a manner to be easily accessed by City staff for review and potential CIP projects. CCTV Response Protocol for Trunk and Collector Line Blockages PROTOCOL: During the course of routine collection system CCTV inspection, staff can detect trunk or collector line blockages. The Wastewater Utilities Supervisor and necessary response staff are contacted for blockage mitigation, the Vactor truck and other wastewater staff. Mitigation of a blockage is first priority to prevent a potential SSO. Once the appropriate staff has mitigated the main line blockage, CCTV staff performs a comprehensive inspection of the impacted main line segment ensuring a free-flowing system. Documentation shall include identifying the cause of the SSO, i.e., roots, debris, silt, grease or defect. CCTV Response Protocol for Trunk and Collector Line Partial Blockages City of Poway SSMP 5 Section 4.0 Operation and Maintenance PROTOCOL: During the course of routine collection system CCTV inspection, staff can detect trunk or collector line partial blockages. The Wastewater Utilities Supervisor and necessary response staff are contacted for blockage mitigation, Vactor truck and other wastewater staff. Mitigation of a blockage is first priority to prevent a potential SSO. Once the appropriate staff has mitigated the main line blockage, CCTV staff performs a comprehensive inspection of the impacted main line segment ensuring a free-flowing system. Documentation shall include identifying the cause of the SSO, i.e., roots, debris, silt, grease or defect. CCTV Response Protocol for identifying lateral blockages during routine mainline inspections. PROTOCOL: CCTV staff identifying a lateral connection blockage during routine mainline segment video inspections will identify the location of the lateral in the street or easement associate the lateral with a structure and try to locate the property line cleanout. Once the property line cleanout is located, an email including a photo of the issue is sent to the Wastewater Utilities Supervisor for review and coordination with Utility staff to respond and mitigate the issue. If no property line cleanout is found CCTV staff try and contact occupant of the structure or leave the Wastewater Utilities Supervisor’s business card, boiler plate letter explaining their findings and public outreach pamphlet explaining the City policy regarding lateral maintenance. In addition, an email and attached photo are sent to the Wastewater Utilities Supervisor to document and to use in discussion with property owner if they contact the city for further information. CCTV Response Protocol for Trunk and Collector Line SSO PROTOCOL: CCTV staff is called out to all SSO’s to perform comprehensive video documentation of the impacted mainline segments and to ensure a free-flowing system. Documentation shall include identifying the cause of the SSO, i.e., roots, debris, silt, grease or defect. Utility Work, Annual Lateral Assessments, Annual Manhole Inspections, Easements, and Customer Care UTILITY CREW is a two-man function performing multiple scheduled and unscheduled core functions: Annual Lateral Assessment: Staff is assigned lateral assessments each month based on lateral documentation from CaretGraph from the previous year. An assessment is performed to determine condition of the lateral and if additional City of Poway SSMP 6 Section 4.0 Operation and Maintenance action is required. If action is required, the lateral is either cable or jet-rodded and an inspection is performed. If the lateral inspection identifies a rating of 40 or less it is schedule on an annual basis to verify condition and determine any additional course of action; root foaming, excavation repair, or lining. Annual Manhole Inspections: Staff is assigned manhole inspection each month based on manhole documentation from CarteGraph from the previous year. An inspection is performed to determine condition of the manhole and if additional action is required. If action is required and manhole inspection identifies a rating of 40 or less it is scheduled on an annual basis to verify condition and determine any additional course of action; manhole lining. Customer Care: Staff responds to and investigates and mitigates customer inquiries, complaints and concerns related to property-line cleanouts, operational procedures, policies and odor complaints. Lateral Blockage: Staff responds to and investigates and mitigates possible lateral blockages reported by customers. Staff verifies the location of an existing property-line cleanout and determines whether the issue is City of Poway or private property owner responsibility. Smoke Testing: Staff performs testing of the infrastructure by introducing smoke into the collection system via manholes to detect inflow, infiltration, and to verify legal and non-legal connections. Raising Manholes: Staff raises manholes to grade in roadways and on easements to ensure compliance with Street and Highway Standards and access for general maintenance. Easement Maintenance: Staff verifies location and width of easement utilizing available resources. Staff locates manholes, dead-end cleanouts, and performs vegetation trimming and clearance as necessary to ensure equipment access for maintenance. Installing Property-Line Cleanouts: Staff will perform visual inspection and install the new No. 3 cleanout box, lid, plug and adaptor on new connections. Traffic Control: Staff sets up and maintains approved traffic control for various projects including Monthly and Quarterly High Frequency Flushing locations. Emergency Responders: Wastewater staff are the initial responders to all emergency calls, lateral blockages, and Sanitary Sewer Overflows (SSO’s). City of Poway SSMP 7 Section 4.0 Operation and Maintenance SEWAGE LIFT STATIONS The City of Poway has five sewer lift stations for sewage pumping: • St. Andrews Lift Station (LS-2) completed: HP Pump GPM # of Pumps Force Main Diameter Force Main Length Force Main Material Pump Manufacturer 15 125 3 4-inch 1,083 feet PVC Monoflo • Highlands Ranch Lift Station (LS-4) completed: HP Pump GPM # of Pumps Force Main Diameter Force Main Length Force Main Material Pump Manufacturer 30 100 2 4-inch 1,335 feet PVC Flygt NP 3153 SH • Camino Del Valle Lift Station (LS-3) completed: HP Pump GPM # of Pumps Force Main Diameter Force Main Length Force Main Material Pump Manufacturer 60 900 3 6-inch 6,494 feet PVC Cornell • Old Coach Lift Station (LS-1): HP Pump GPM # of Pumps Force Main Diameter Force Main Length Force Main Material Pump Manufacturer 75 125 2 6-inch 2,745 feet PVC Essco • Heritage Lift Station (LS-5): HP Pump GPM # of Pumps Force Main Diameter Force Main Length Force Main Material Pump Manufacturer 25 215 2 6-inch 3,694 feet PVC Yeomans City of Poway SSMP 8 Section 4.0 Operation and Maintenance Lift Station Preventive Maintenance Activities • Daily Physical Checks: All five lift stations are inspected as per a guide list provided for each station (daily checks are accomplished Monday through Friday) as described below: Daily / Weekly 1. Visually inspect station for vandalism. 2. Listen for noise, feel for vibration, and detect any odors. 3. Clean up any trash or debris. 4. View pump hours for each pump. 5. Run each pump by hand / MANUAL control and watch level control go up and down to ensure pumps are operating properly. 6. Check sump pumps operation. 7. Inspect the pumps to see if they are going backwards; if so, clean check valves. 8. Place pump controls back in AUTO position prior to leaving station. 9. Visually inspect emergency generator (if equipped) for fuel and ability to operate properly. 10. Test all panel lights and change as needed to ensure proper operation. 11. Report all problems with the lift station in CartéGraph. 12. Lock up station, including exterior power panels if required, prior to leaving. Monthly 1. Open up wet well and visually inspect the pumping of each pump. 2. Completely pump down wet well to lowest point; make a visual inspection. 3. Hose the wet well down during the pump down process. 4. Inspect wet well for excessive grease buildup on surface; clean when needed. 5. Check wet well floats for rag buildup; clean as needed. 6. Visually check pumps and piping for defects. 7. Power backup generator and check fuel level, battery and general condition; check transfer switch. 8. Perform end-of-month reads. City of Poway SSMP 9 Section 4.0 Operation and Maintenance Quarterly 1. Clean the wet wells. 2. Clean Grinders (if equipped) Summary • Electronic Monitoring: Stations are real-time monitored (SCADA) via telemetry or radio lines. All stations are equipped with a HIGH wet well, PUMP FAILURE, and DRY well flooding alarms. In addition, all stations are equipped with override controls. Sewer lift stations are currently undergoing improvements adding auxiliary power via generators to mitigate power failure. • Weekly Physical Checks: Detailed dry and wet well inspection. • Monthly Physical Checks: Test all components (pumps, valves, alarms, bubblers) and verify all alarm system set points. • Record Efforts: Document discrepancies using CartéGraph maintenance software. • Staff Monitoring: Water Treatment Plant staff monitors lift stations around the clock through real- time SCADA displays maintained at the water treatment plant. REHABILITATION AND REPLACEMENT PROGRAM (c) Develop a rehabilitation and replacement plan to identify and prioritize system deficiencies and implement short- and long-term rehabilitation actions to address each deficiency. The program should include regular visual and CTTV inspections of manholes and sewer pipes, and a system for ranking the condition of sewer pipes and scheduling rehabilitation. Rehabilitation and replacement should focus on sewer pipes that are at risk of collapse or prone to more frequent blockages due to pipe defects. Finally, the rehabilitation and replacement plan should include a capital improvement plan that addresses proper management and protection of the infrastructure assets. The plan shall include a time schedule for implementing the short- and long-term plans plus a schedule for developing the funds needed for the capital improvement plan. The City plans to budget for $250,000 per fiscal year over the next 5-years for rehabilitation and replacement of wastewater system deficiencies. The Development Services Department manages the design and construction of the program. Funding is allocated annually based upon program needs and available City of Poway SSMP 10 Section 4.0 Operation and Maintenance funds. The Public Works Department systematically completes CCTV of a portion of the City’s sewer pipes each year. As deficiencies are found, the information is provided to the Development Services Department, a priority is attached to the deficiency, and it is added to the list as either a short-term immediate project or long-term future project. Each year, the two departments coordinate to determine the project scope for that year. The City continues in its effort to mitigate infiltration by identifying manholes requiring rehabilitation. Fiscal year 17/18 Manhole Rehabilitation project consisted of rehabilitation (99) manholes for a sum of $211,960. Sewer Manhole Rehabilitation CIP funding is identified as SWR0002 with a current available balance of $183,961 for future manhole rehabilitation. (d) Staff is provided Sewer System Operations and Maintenance, SSMP AND OERP training various times throughout the year. All training is documented in the CarteGraph OMS program. Contractors are provided mandatory SSMP/OERP training during pre-construction meetings prior to start of project to verify and acknowledge that they have read and understand the documents, contact information, and reporting procedures. Pre-construction training notes are stored in project files at Development Services. (e) Provide equipment and replacement parts inventories, including identification of critical replacement parts. Vactor, CTTV, lift stations, etc. (Section 4e-1) Section 4.0 a. Collection System Map The City of Poway’s GIS application currently has sewer pipes and manholes. They were converted into the GIS files and we currently use them on our internal GIS Web Application (PowayGIS). The City released an RFP in 2009 to have its sewer facilities converted from the original engineering as-built drawings. This project was completed in 2010 and includes the scanning of these documents. The RFP included a tool to allow City staff to create field maps for use by the crews, as well as a maintenance application that allows City staff to keep the data current. b. Resources and Budget Enterprise Fund Financing: The City of Poway utilizes an enterprise fund for financing its sewer utility operations. The primary source of revenue for the sewer enterprise fund is generated from user fees, which are adjusted annually under a Proposition 218 compliant process. The City utilizes a comprehensive rate model to determine the revenue requirement for sewer operations, and derive user rates that are sufficient to recover fixed and variable costs and apportion these costs equitably among sewer system users. Rate-based user fees are also the primary source for financing sewer system capital improvements (see CIP Information) and infrastructure rehabilitation. The sewer enterprise fund is included in the City of Poway annual audit, performed by an independent certified firm, to ensure adherence to GAAP and GASB standards as well as the City’s formally adopted Financial Principles. Operating Budget and Expenditure Plan: Each year, a Comprehensive Financial Program is adopted by public hearing of the City Council of the City of Poway. The adopted Financial Program authorizes the appropriation of funds for all City operating budgets, including the general, enterprise, and special funds. The sewer enterprise fund includes two cost centers for sewer operations, comprised of Wastewater Pumping and Disposal, and Wastewater Collection Maintenance. The budget expenditure activity detail for these costs centers is included with this submittal. The Financial Program also establishes the basis for the allocation of administrative and indirect costs, which are included in the appropriation of sewer funds. The adopted cost allocation, or Budget by Fund (pages xviii – xix of the Financial Program), is also included with this submittal. Section 4.0 Capital Improvement Plan Requirement: The City of Poway manages public infrastructure and facilities under a formal multi-year Capital Improvement Program. Major updates to the program are completed every 5 years, and program adjustments are adopted annually as needed. General oversight of the Program is provided by the City Manager, and CIP Administration is managed under the City’s Capital Improvement Administration division, comprised of project management, engineering and administrative staff. Technical assistance and financial administration is provided by Administrative Services. The current group of capital improvements for the sewer system is based on the findings of a comprehensive sewer system master plan. The plan identified improvements necessary to meet ultimate capacity requirements based on the City of Poway General Plan. Funds are also appropriated each year for as-needed rehabilitation projects. San Diego L a k eHodge s L a k ePoway RanchoBernardo CarmelMountainRanch S.D. County S.D. County San Diego Pom er a d o R dP o m era d o Rd C a r m e l M o untainRdRanchoCarmelDrR anchoBernardoRd Po m eradoRdTedWilliam s Pky Camino Del Norte S c ri pp s P ow ay Pk y S c r i p p s P o w a y P k y Espola Rd EspolaRd PowayR d P o w a yRd§¨¦15 41C 38D 38A 36F 36E 22E 22D 22C 32C 33A 28D 28B 28C33D33E31 30 13E 22A 21A 21C 21B 19G 2B 2A 3 1C 38D 36C 35B35C 5B 5C 9C 26C 29C 28A 27 36D 36A 1A 1B 1D 1F1E 8B 4C 7C 19A 8A 6B 6C 5A 5D7A 7B 19B 19D 19C19B 11A 11B 11C 9A 9B 11D 10C 9D 9C 10A 10B 11E 12A 12C 12D 12B 15D 15B 15C 19E20B 20A 19F20C 21D 21E 15A 15E 17A 18A 16A 13A 16C 16B 26A23A 23C 22B 13D 26F 26E26B26D 28E 14C 14B 33B 33C 14D14E14F 29A 13F 16D 29B 17B 17C 30 18C 18E 25A 25B 42C 36B 42B 37A 37C 37B38C 38B 41D 41B 41A 40A 39E 40B 39F 40C 35A 34E 39B 39D 34C 34D 34B 34A 32A32B 39C 39A 10C 42A 18B 42 18D 23B 24 4B 4A 6A 14A 13C 13B Section 4a-1 This map provided without warranty of any kind, either express or implied, including but not limited to, the implied wa rranties of merchantability and fitness for a particular purpose. This map has been prepared for descriptive purposes only and its accuracy cannot be guaranteed. 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") ") ") ") ") ") #* #* #* #* #* #* #* San Diego L a k eHodge s L a k ePoway RanchoBernardo CarmelMountainRanch S.D. County S.D. County San Diego SabreSpringsPkyPo m eradoRdPom er a d o R dP o m era d o Rd CarmelMountainR d RanchoCarmelDrR a n cho BernardoRd TedWilliam s Pky Camino Del Norte S c r i p p s P o w a y P k y S c rip ps P ow a y P k y P owayRdPoway Rd Espola Rd EspolaRd §¨¦15 Section 4a-2 This map provided without warranty of any kind, either express or implied, including but not limited to, the implied wa rranties of merchantability and fitness for a particular purpose. This map has been prepared for descriptive purposes only and its accuracy cannot be guaranteed. Sewer System22 May 2019 City of Poway N0.5 0 0.50.25 Miles Sewer Mains: LiftSta tion MeterSta tion Manhole Unknown 3" - 8" 10" - 15" 16" - 21" 24" - 30" 33" - 42" Hale Connection LS1 LS2 LS3 LS4 LS5 RB Connection Lift Station Zones: Sewer Features: ! #* ") San Diego L a k ePoway RanchoBernardo CarmelMountainRanch S.D. County S.D. County San Diego Po m e radoRdPom er a d o R dP o m era d o Rd Ca r m e l M ountainRdPomerado RdTedWilliam s Pky Camino Del Norte Scripps Powa y Pk y ScrippsPow ay P k y P o w a y R d E s p o l a R d Espola RdPowayR d P o w a yRd§¨¦15 Section 4a-3 This map provided without warranty of any kind, either express or implied, including but not limited to, the implied wa rranties of merchantability and fitness for a particular purpose. This map has been prepared for descriptive purposes only and its accuracy cannot be guaranteed. CMPs and Squashed CMPs22 May 2019 City of Poway All Other Pipes CMP Squashed CMP Cha nnels N0.5 0 0.50.25 Miles ID MaintBook Zone HFF Book HFF Sequence Type Length Unit Material Sewer Main Diameter Status Ownership 5406WWMAIN 5A Monthly 1 Collector 295 ft VCP 6 inch Asbuilt Poway 5405WWMAIN 5A Monthly 2 Collector 273 ft VCP 6 inch Asbuilt Poway 5397WWMAIN 5A Monthly 3 Collector 306 ft VCP 6 inch Asbuilt Poway 5557WWMAIN 5A Monthly 4 Collector 165 ft VCP 6 inch Asbuilt Poway 5550WWMAIN 5A Monthly 5 Collector 229.76 ft VCP 6 inch Asbuilt Poway 3806WWMAIN 5A Monthly 6 Collector 101.93 ft VCP 8 inch Asbuilt Poway 3804WWMAIN 5A Monthly 7 Collector 144 ft DIP 8 inch Asbuilt Poway 3805WWMAIN 6A Monthly 8 Collector 352.87 ft VCP 8 inch Asbuilt Poway 3803WWMAIN 5A Monthly 9 Collector 186.77 ft VCP 8 inch Asbuilt Poway 4288WWMAIN 6C Monthly 10 Collector 290.93 ft PVC 10 inch Asbuilt Poway 4287WWMAIN 6C Monthly 11 Collector 136.4 ft PVC 10 inch Asbuilt Poway 4652WWMAIN 4B Monthly 12 Collector 221.8 ft VCP 8 inch Asbuilt Poway 4660WWMAIN 4B Monthly 13 Collector 175 ft VCP 8 inch Asbuilt Poway 7000WWMAIN 4B Monthly 14 Collector 93 ft VCP 8 inch Asbuilt Poway 4751WWMAIN 4B Monthly 15 Collector 254 ft VCP 8 inch Asbuilt Poway 4029WWMAIN 7B Monthly 16 Collector 320 ft VCP 8 inch Asbuilt Poway 4030WWMAIN 7B Monthly 17 Collector 215.02 ft VCP 8 inch Asbuilt Poway 7103WWMAIN 23C Monthly 18 Collector 140 ft VCP 8 inch Asbuilt Poway 5113WWMAIN 22B Monthly 19 Collector 280 ft VCP 8 inch Asbuilt Poway 5108WWMAIN 23C Monthly 20 Collector 170 ft VCP 8 inch Asbuilt Poway 5057WWMAIN 23C Monthly 21 Collector 287 ft VCP 8 inch Asbuilt Poway 798WWMAIN 24 Monthly 22 Collector 386 ft VCP 8 inch Asbuilt Poway 796WWMAIN 24 Monthly 23 Collector 248 ft VCP 8 inch Asbuilt Poway 797WWMAIN 24 Monthly 24 Collector 85 ft VCP 8 inch Asbuilt Poway 1002WWMAIN 42B Monthly 25 Siphon 630 ft VCP 8 inch Asbuilt Poway 985WWMAIN 42B Monthly 26 Siphon 630 ft VCP 15 inch Asbuilt Poway 817WWMAIN 42C Monthly 27 Collector 153.5 ft VCP 8 inch Asbuilt Poway 816WWMAIN 25B Monthly 28 Collector 325 ft VCP 8 inch Asbuilt Poway 818WWMAIN 25B Monthly 29 Collector 244 ft VCP 8 inch Asbuilt Poway Monthly High Frequency Flushing Mainline Segments May 2019 SECTION 4b-1 835WWMAIN 37C Monthly 30 Collector 270 ft VCP 15 inch Asbuilt Poway 834WWMAIN 37C Monthly 31 Collector 209.46 ft VCP 15 inch Asbuilt Poway 7098WWMAIN 36D Monthly 32 Collector 290 ft VCP 8 inch Asbuilt Poway 2192WWMAIN 31 Monthly 33 Collector 153.05 ft VCP 8 inch Asbuilt Poway 6367WWMAIN 29C Monthly 34 Collector 263 ft VCES 8 inch Asbuilt Poway 6365WWMAIN 30 Monthly 35 Collector 135 ft VCES 8 inch Asbuilt Poway 6366WWMAIN 29C Monthly 36 Collector 273 ft VCES 8 inch Asbuilt Poway 5643WWMAIN 14E Monthly 37 Collector 34.3 ft PVC 8 inch Asbuilt Poway 5647WWMAIN 14E Monthly 38 Collector 320.1 ft VCP 8 inch Asbuilt Poway 1631WWMAIN 13E Monthly 39 Collector 230 ft PVC 8 inch Asbuilt Poway 1632WWMAIN 13E Monthly 40 Collector 350 ft VCP 8 inch Asbuilt Poway 1725WWMAIN 13E Monthly 41 Collector 235 ft VCP 8 inch Asbuilt Poway 4296WWMAIN 13E Monthly 42 Collector 160.5 ft VCES 8 inch Asbuilt Poway 42 10262 Footage TotalSegment Total Count SECTION 4b-1 ID MaintBook Zone HFF Book HFF Sequence Type Length Unit Material Sewer Main Diameter Status Ownership 2792WWMAIN 26C Quarterly 1 Collector 254 ft VCP 8 inch Asbuilt Poway 2139WWMAIN 29A Quarterly 2 Collector 228 ft VCP 10 inch Asbuilt Poway 1997WWMAIN 30 Quarterly 3 Collector 230 ft VCP 10 inch Asbuilt Poway 4305WWMAIN 29B Quarterly 4 Collector 384.68 ft PVC 8 inch Asbuilt Poway 2103WWMAIN 29B Quarterly 5 Collector 252.6 ft PVC 8 inch Asbuilt Poway 2060WWMAIN 30 Quarterly 6 Collector 374 ft VCP 8 inch Asbuilt Poway 2031WWMAIN 30 Quarterly 7 Collector 365 ft VCES 10 inch Asbuilt Poway 833WWMAIN 37C Quarterly 8 Collector 210.9 ft VCP 15 inch Asbuilt Poway 832WWMAIN 42B Quarterly 9 Collector 315 ft VCP 15 inch Asbuilt Poway 1612WWMAIN 23A Quarterly 10 Collector 274 ft VCP 8 inch Asbuilt Poway 3217WWMAIN 19D Quarterly 11 Collector 167.31 ft VCP 8 inch Asbuilt Poway 3212WWMAIN 19E Quarterly 12 Collector 274.8 ft VCP 8 inch Asbuilt Poway 3224WWMAIN 19E Quarterly 13 Trunk 45 ft VCP 8 inch Asbuilt Poway 3206WWMAIN 19E Quarterly 14 Collector 163 ft VCP 8 inch Asbuilt Poway 3994WWMAIN 19A Quarterly 15 Collector 270 ft VCP 8 inch Asbuilt Poway 3995WWMAIN 19A Quarterly 16 Collector 111.81 ft VCP 8 inch Asbuilt Poway 3931WWMAIN 19A Quarterly 17 Collector 274.33 ft VCP 8 inch Asbuilt Poway 3942WWMAIN 19A Quarterly 18 Collector 336.57 ft VCP 8 inch Asbuilt Poway 3957WWMAIN 19A Quarterly 19 Collector 335.56 ft VCP 8 inch Asbuilt Poway 3958WWMAIN 7B Quarterly 20 Collector 130 ft VCP 8 inch Asbuilt Poway 3962WWMAIN 7B Quarterly 21 Collector 201.47 ft VCP 8 inch Asbuilt Poway 3960WWMAIN 7B Quarterly 22 Collector 138.83 ft VCP 8 inch Asbuilt Poway 3959WWMAIN 7B Quarterly 23 Collector 350 ft VCP 8 inch Asbuilt Poway 3965WWMAIN 7B Quarterly 24 Collector 326.16 ft VCP 8 inch Asbuilt Poway 3970WWMAIN 7B Quarterly 25 Collector 131 ft VCP 8 inch Asbuilt Poway 3929WWMAIN 7B Quarterly 26 Collector 300.9 ft VCP 8 inch Asbuilt Poway 4031WWMAIN 7B Quarterly 27 Collector 220 ft VCP 8 inch Asbuilt Poway 4039WWMAIN 7B quarterly 28 Collector 233 ft VCP 10 inch Asbuilt Poway 4032WWMAIN 7B Quarterly 29 Collector 124.82 ft VCP 8 inch Asbuilt Poway 4268WWMAIN 6C Quarterly 30 Collector 363.8 ft VCP 8 inch Asbuilt Poway 4267WWMAIN 6C Quarterly 31 Collector 323 ft VCP 8 inch Asbuilt Poway 4669WWMAIN 6C Quarterly 32 Trunk 260.25 ft VCP 8 inch Asbuilt Poway 4679WWMAIN 6C Quarterly 33 Trunk 350 ft VCP 8 inch Asbuilt Poway 4678WWMAIN 6C Quarterly 34 Trunk 350 ft VCP 8 inch Asbuilt Poway 4676WWMAIN 6C Quarterly 35 Trunk 349 ft VCP 8 inch Asbuilt Poway 4408WWMAIN 3 Quarterly 35.5 Collector 135 ft VCP 8 inch Asbuilt Poway 4407WWMAIN 3 Quarterly 36 Collector 172 ft VCP 8 inch Asbuilt Poway 4797WWMAIN 3 Quarterly 37 Collector 188.8 ft VCP 8 inch Asbuilt Poway 4932WWMAIN 3 Quarterly 38 Collector 342.86 ft VCP 8 inch Asbuilt Poway 4931WWMAIN 3 Quarterly 39 Collector 350 ft VCP 8 inch Asbuilt Poway 1759WWMAIN 16D Quarterly 40 Collector 230 ft PVC 8 inch Asbuilt Poway 2016WWMAIN 13F Quarterly 41 Collector 350 ft VCP 8 inch Asbuilt Poway 1445WWMAIN 13A Quarterly 42 Collector 350 ft VCP 8 inch Asbuilt Poway 3084WWMAIN 11C Quarterly 43 Collector 241.56 ft VCP 8 inch Asbuilt Poway 44 11379.01 Footage Total Quarterly High Frequency Flushing Mainline Segments May 2019 Segment Total Count SECTION 4b-2 City of Poway Capital Improvement Program Summary Updated May 2019 2019/2020 CIP SEWER PROJECTS 5 YEAR PLAN WORKSHEET 18/19 Ongoing Projects Sewer Line Repair Replace 14/15 (Pomerado at Stone Canyon)$745,000 (previously funded) Martincoit Road Sewer Upsize (MP CAP-01)$2,300,000 (previously funded) Sewer Line Repair Replace 16/17 (Exposed Sewer east of Martincoit)$300,000 (design previously funded) Butterfield Trail Sewer Upsize (MP CAP-02)$1,300,000 (previously funded; delayed to 2020) Year Proposed Projects Estimated Cost Annual Appropriation 19/20 Manhole Rehabilitation 19/20 $150,000 19/20 Sewer Line Repair Replace 16/17 (Exposed Sewer east of Martincoit)$1,000,000 (construction) $1,150,000 19/20 20/21 Manhole Rehabilitation 20/21 $150,000 20/21 Sewer Line Repair Replace 20/21 $250,000 20/21 Butterfield Trail Sewer Upsize (MP CAP-02)$1,300,000 (previously funded) $400,000 20/21 21/22 Manhole Rehabilitation 21/22 $150,000 21/22 Sewer Line Repair Replace 21/22 $250,000 21/22 Sagewood Drive Sewer Upsize-Orchard Bend to Martincoit (MP CAP-04)$530,000 $930,000 21/22 22/23 Manhole Rehabilitation 22/23 $150,000 22/23 Sewer Line Repair Replace 22/23 $250,000 22/23 Treatment Plant Sludge Discharge Study $25,000 22/23 Camino Del Valle MCC Rebuild $50,000 22/23 Camino Del Valle Lift Station Upgrades (MP CAP-11)$45,000 $520,000 22/23 23/24 Manhole Rehabilitation 23/24 $150,000 23/24 Sewer Line Repair Replace 23/24 $250,000 23/24 Old Coach Lift Station Capacity Upgrade (MP CAP-10)$660,000 23/24 Replace generator at Old Coach Lift Station $125,000 $1,185,000 23/24 5 Year Total $4,185,000 average/year $837,000 LONG TERM Annual Sewer Line Repair Replace Project $250,000 per year Annual Manhole Rehabilitation $150,000 per year Lake Poway Road/Espola Road Sewer Main Replace/Upgrade $340,000 Poway Road Sewer Upsize-Pomerado to Oak Knoll (MP CAP-03)$970,000 Rios Road Sewer Replacement (MP CAP-05)$1,403,000 Powers Road Sewer Replacement (MP CAP-06)$452,000 Bowron Road Sewer Replacement (MP CAP-07)$382,000 Community Road Sewer Replacement (MP CAP-08)$878,000 Neddick Avenue Sewer Replacement (MP CAP-09)$85,000 Install Scrubber Systems at Various Lift Stations $100,000 5 Lift Stations Rehab/Replace tbd HAARF Capacity Relief Project tbd Ductile Iron Pomerado Sewer Replacement tbd Section 4c-1 Wastewater Division Critical Parts List Updated May 2019 Spare Parts Jet Rodder 2012 International Vactor Jet Rodder 600' of hose 2019 Detroit Diesel GAPVAX Jet Rodder 600' of hose , extra 600' of hose on spool in warehouse. Cable Rodder 1065 Spartin Rodder 75' of cable 2001 Spartin Rodder 75' of cable, Two extra 75' spools of cable in storage garage. Generator EU3000is Honda Generator Backup 2000 Honda Generator Pump 2001 Wacker PT3A Pump Backup 2001 Wacker PT3A Pump Pump ML23P Pump Parts avaliable through Hawthorne Trailer Jetter 2007 U.S. Jetting Trailer Jetter Parts availiable through U.S. Jetter Easement Crawler 2016 Sewer Equipment of America Crawler Rodder Parts avaliable through Plumbers Depot Equipment Section 4e-1 Utilities Systems Division Sewer Lift Station Critical Replacement Parts Updated May 2019 Station Spare Parts Complete pump Pump Type LS-1 Spare pump and motor Yes Essco LS-2 Spare pump/motor budgeted for FY 19/20 purchase Yes Monoflo LS-3 Spare pump and motor Yes Cornell LS-4 Spare pump and motor Yes Flygt NP 3153 SH LS-5 Spare pump and motor Yes Yeomans Section 4e-1 Task ID Activity Department Details Notes Status Actual Stop Date 175938 Training Wastewater Collection WW Crew attend Bi-weekly Safety Tailgate "Avoid Back Injury by Lifting Correctly"Completed 7/11/2017 0:00 176664 Training Wastewater Collection Review SOP for CCTV operations. Become familiar with the van and the locations of equipment and parts. Completed 8/29/2017 0:00 176817 Training Wastewater Collection Attend Dig Alert Training in Ops Lounge WW Crew attended Dig Alert Training.Completed 8/7/2017 0:00 176841 Training Wastewater Collection Tailgate training on Tailgates.Completed 8/29/2017 0:00 177094 Training Wastewater Collection Train Joe with use of Cartegraph and set up filters. Train Joe with GIS usage and plans searching. Completed 8/14/2017 0:00 177305 Training Wastewater Collection Attend JPIA Lockout, Tagout, Basic Electrical Safety training at PW Operations lounge. Morning session 7:30-11:00am, afternoon session 12:00-4:00pm. Completed 8/23/2017 0:00 177350 Training Wastewater Collection Training for the usage of the CCTV equipment with unit 25 Completed 8/18/2017 0:00 177494 Training Wastewater Collection CCTV Training with Chad Completed 9/30/2017 0:00 179859 Training Wastewater Collection Tri State Completed 10/2/2017 0:00 180082 Training Wastewater Collection Attend Mandatory Hazardous Communication training session.Completed 9/28/2017 0:00 180270 Training Wastewater Collection Attend Traffic Control Training in Ops Lounge WW Crew attended Traffic Control Training Completed 10/11/2017 0:00 180533 Training Wastewater Collection Attend Snake awareness training in Ops Lounge tended Snake awareness training in Ops Loun Completed 10/11/2017 0:00 180640 Training Wastewater Collection Training with Chad for CCTV maintenance and light repairs. e reel. Explained break down and build up pr Completed 10/13/2017 0:00 180875 Training Wastewater Collection Attend Environmental Safety Completed 10/18/2017 0:00 182507 Training Wastewater Collection Emergency Generator Response Action Plan. mergency Generator Response Action Plan. ER Completed 11/1/2017 0:00 182629 Training Wastewater Collection Attend scheduled DKF Solutions Group training on Sewer Overflow and Backup Response Plans. Completed training provides certificate of completion to include 3 contact hours. Completed 11/2/2017 0:00 Wastewater Training Matrix 184226 Training Wastewater Collection Attend SCAP Meeting/ Training in Carlsbad topics on activities with different municipalitie Completed 12/12/2017 0:00 184351 Training Wastewater Collection Attend bi-weekly Cal-OSHA safety training - A burning issue: fire prevention and safety.Completed 12/18/2017 0:00 184371 Training Wastewater Collection Attend JPIA Trenching and Shoring training as required.Completed 3/2/2018 0:00 184551 Training Wastewater Collection JPIA Training for Trenching And Shoring Completed 12/20/2017 0:00 185117 Training Wastewater Collection Attend Mandatory Cal-OSHA bi-weekly safety tailgate, Dangers of using damaged jetter hose and proper repairs techniques. Completed 1/9/2018 0:00 185152 Training Wastewater Collection Attend safety training tailgate associated with new Vactor disinfectant product "Vanguard San-Solution" prior to use in the field. Completed 1/11/2018 0:00 185728 Training Wastewater Collection Attend Mandatory Cal-OSHA Bi-weekly safety tailgate "Hands on training on use of vactor hose swage machine" Completed 1/23/2018 0:00 185733 Training Wastewater Collection Train crew on swedge kit to mend piranha armor belt hose for Vactor.Completed 1/24/2018 0:00 186495 Training Wastewater Collection Attend mandatory Cal-OSHA Bi-weekly safety tailgate meeting "Get a leg up on ladder safety" Completed 2/6/2018 0:00 186822 Training Wastewater Collection Attend mandatory Cal-OSHA Bi-weekly safety tailgate "Avoiding Slips and Trips"Completed 2/20/2018 0:00 187694 Training Wastewater Collection Fit testing: In class Lecture and face mask fitting cept for Chad. Chad will test at later time to f Completed 2/28/2018 0:00 187898 Training Wastewater Collection Attend mandatory Cal-OSHA bi-weekly safety tailgate " Climb into confined - space safety" Completed 3/5/2018 0:00 189316 Training Wastewater Collection Attend Cal-OSHA mandatory bi-weekly tailgate safety meeting "OSHA Fact Sheet ,Personal Protective Equipment". Completed 3/19/2018 0:00 189954 Training Wastewater Collection Attend mandatory Cal-OSHA bi-weekly tailgate "Safe Driving in Adverse Weather Condition" Completed 4/4/2018 0:00 191683 Training Wastewater Collection Attend new backhoe equipment walk around training at Fleet.Completed 4/12/2018 0:00 192112 Training Wastewater Collection Attend new GraniteNet training. Training is a three day event. Will need to locate decent pipe to run during training. Nothing that needs cleaning. . Staff learned how operate the new system t Completed 5/3/2018 0:00 192542 Training Wastewater Collection Attend CSRMA Webinar sponsored by DKF Solutions " Selecting the Best Method and Nozzle/Attachment for Cleaning Pipe". (1 Contact Hour) Webinar ID: 584-075-059 Webinar will start at 8:15am and conclude at 9:15am. Webinar debriefing will be conducted afterward to discuss training. Completed 4/24/2018 0:00 193164 Training Wastewater Collection Attend mandatory bi-weekly Cal -OSHA safety tailgate "Safe fuel handling practices"Completed 5/14/2018 0:00 194488 Training Wastewater Collection Attend mandatory Cal-OSHA bi-weekly tailgate " ABC's Plus of safety: Awareness and attitude, background, and caution". Completed 5/29/2018 0:00 195237 Training Wastewater Collection Attend Cal-OSHA mandatory by-weekly tailgate safety meeting "Trenching Safety"Completed 6/11/2018 0:00 195451 Training Wastewater Collection Attend CDL training and DMV test. Dates as follows: Training 6/11 - 6/12 - 6/19 - 6/20 - 6/25 - 6/26 DMV Test 6/28 Completed 6/28/2018 0:00 195803 Training Wastewater Collection ERT Training- Train Barn/ Old Poway Park Completed 3/28/2019 0:00 195913 Training Wastewater Collection Attend Cal-OSHA mandatory bi-weekly safety tailgate meeting "Using Jackhammer Safety". Completed 6/25/2018 0:00 195953 Training Wastewater Collection Attend 2 Day Backhoe Safety and Skills Training with Ron provided through Hawthorne CAT. Training is split between Classroom and Field. Training with Ron provided through Hawthor Completed 6/26/2018 0:00 197838 Training Wastewater Collection Attend mandatory Cal-OSHA bi-weekly safety tailgate " Avoiding slips and trips".Completed 7/25/2018 0:00 199298 Training Wastewater Collection Attend JPIA Big 5 safety training at operations: *Hearing *Heat Illness *BBP *Aerosolized Transmitted Diseases Completed 8/15/2018 0:00 199299 Training Wastewater Collection Attend JPIA CPR/First Aid training at operations as required. Afternoon class starts at noon and ends at 4pm. Completed JPIA training on CPR/AED/First Aid Completed 8/30/2018 0:00 199300 Training Wastewater Collection Attend CAT Backhoe level one certification at Hawthorne Rancho Bernardo site.Completed 8/7/2018 0:00 199654 Training Wastewater Collection Attend mandatory Cal-OSHA bi-weekly safety tailgate " Carbon Monoxide: A silent killer". Completed 8/20/2018 0:00 199688 Training Wastewater Collection Attend initial training on new Gapvax equipment, training will start at fleet then move out into the field. (8am - 2pm). ue to a Customer request. Observed operatio Completed 8/23/2018 0:00 199907 Training Wastewater Collection Provide training for new staff for the process of CCTV with PLC's g for Ivan and Jose to perform CCTV push cam Completed 8/27/2018 0:00 200021 Training Wastewater Collection ERT training on ERT procedures MJ attended ERT procedure training in Admi Completed 8/31/2018 0:00 200056 Training Wastewater Collection Attend Cal-OSHA safety tailgate "Reducing the threat of customer violence".Completed 9/4/2018 0:00 201220 Training Wastewater Collection Assist Vactor Crew with training new staff. Includes training on Traffic Control, SOP, and Mitigation. 9-10-18 Showed Jose how to perform one man flagging around the Vactor on Oak Knoll Rd. for Monthly HFF. I first demonstrated while explaining the techniques to use. Jose observed and then took over flagging duties while I observed his abilities. He did a great job and comprehended the skills to safely flag traffic around the Vactor. 9-11-18 Trained Vactor Crew on locating buried MH's, root removal, and final jetting. 9-27-18 Observe Jose operate in Zone 1A. He did very well and looked confident in his abilities. I explained what heads I would use and why per Main as well as PSI and he comprehended. He adjusted well when faced with difficulties obtaining the distance needed. 10-30-18 Worked with MJ and Ivan: Reviewed jetting and easements with 535 & 91. Used the GapVax in the afternoon for WW crew to familiarize ourselves with the new Combination Vacuum Jetting vehicle. Reviewed Monthly HFF procedures and T.C. 11-8-18 Explained the forced main to Ivan and Nick located on Highlands Ranch Rd. Assisted with jetting and filling. Completed 4/10/2019 0:00 201224 Training Wastewater Collection Assist with CCTV Training. Training includes Traffic Control, SOP, and Mitigation 9-10-18 CCTV operations as well as the use of Cartegraph time recording. Ivan began operating the CPR... CPR had issues with panning head. Showed crew how to trouble shoot OZ3 head. Used test cable as well. Contacted Cues West who confirmed to me they have a loaner. They will contact Plumbers Depot to set up Loaner Agreement. 9-11-18 Trained CCTV on locating buried MH's, root removal, and final jetting. 9-27-18 Observed Ivan operate CPR, performed very well and treated the equipment well. Completed 4/10/2019 0:00 201399 Training Wastewater Collection ERT Training for Facility Gate Operations.Completed ERT Training for Gate Operations.Completed 9/14/2018 0:00 201413 Training Wastewater Collection Attend "Your role as disaster service worker" training at city hall 8am to 9am.WW Staff attended the training at City Hall.Completed 9/19/2018 0:00 201414 Training Wastewater Collection Attend "confined space training" at operations. 7:30am - 11:30am. attended the Confined Space Safety review i Completed 9/27/2018 0:00 201748 Training Wastewater Collection Attend mandatory Cal-OSHA bi-weekly safety tailgate "Your Role as a Disaster Services Worker - Being Prepare" Training is at City Hall administered by Safety Services. Completed 9/19/2018 0:00 203000 Training Wastewater Collection Attend Respiratory Training class in morning from 7:15 - 8:15am. Fit testing schedule as follows: 9:00 T. Zaragoza 9:15 Chad Fried/Amjad Mohamad/Jose Godinez 9:30 Ivan Martinez/Nick Maxey completed SCBA Fit Testing and Training in O Completed 10/15/2018 0:00 204971 Training Wastewater Collection Attend scheduled SCBA physical at Sharp Rees-Stealy Rancho Bernardo Occupational Medicine 16899 West Bernardo Dr. Jose Godinez - Thursday 10/11/18 @ 1:45pm Ivan Martinez - Monday 10/15/18 @ 1:15pm. I have passed the test!Completed 10/11/2018 0:00 205196 Training Wastewater Collection Attend JPIA training : Asbestos/Lead, Hazardous waste, and NPDES as required. Training is at Operations November 6th 7:30am - 11:30am. Completed 11/6/2018 0:00 205305 Training Wastewater Collection Attend Gap Vaxs training at Fleet. rkham as well as at Crosthwaite. Hands on tra Completed 10/24/2018 0:00 205532 Training Wastewater Collection ERT Training on mechanical rodding.ERT training Completed 10/26/2018 0:00 206081 Training Wastewater Collection Attend Cal-OSHA bi-weekly safety tailgate meeting "Biohazards and Worker Safety''Completed 11/13/2018 0:00 212334 Training Wastewater Collection Attend Cal-OSHA Mandatory by-weekly safety meeting "Identify, Treat, and Prevent Carpal Tunnel Syndrome". Completed 11/27/2018 0:00 212782 Training Wastewater Collection Train new employee. Go over the Vactor's S.O.P. Practice jeeting procedures. ent to Kirkham to go over all jetting procedure Completed 12/3/2018 0:00 212964 Training Wastewater Collection Attend " Collection Systems Overview" training at Operations as required. Supervisor provide staff overview of wastewater collection system utilizing map of system to identify: * sewer lift stations * flows to and from San Diego to include metering stations * Locations of sewer trunk lines and direction of flows Completed 12/6/2018 0:00 213228 Training Wastewater Collection Attend "Intro to Collection Systems O&M" Webinar at operations lounge 8:15am - 9:15am. ff attended webinar and discussed webinar af Completed 12/13/2018 0:00 213230 Training Wastewater Collection Attend Employee Self Service (ESS) Training at operations lounge 7:30am - 9:00am.Completed 1/9/2019 0:00 213252 Training Wastewater Collection Attend Radio use training at PW Operations lounge morning session 7:30am -11:30am.Completed 12/18/2018 0:00 213564 Training Wastewater Collection Cartegraph Training for Utility Crew d Irving and Vernon in Cartegraph usage for U Completed 12/27/2018 0:00 213777 Training Wastewater Collection Attend Cal-OSHA mandatory by-weekly safety meeting "Climb into confined-space safety". Completed 1/7/2019 0:00 213795 Training Wastewater Collection Attend CLD training. Use this task for all time associated with training. 1/17/19 Ivan went to the DMV to get his class A permit. 1/17/19 Vernon went to the DMV to get start his class A permit. 1/18/19 Vernon went to the DMV to finish his class A permit. Completed 4/8/2019 0:00 213865 Training Wastewater Collection Training new hire on CCTV Completed 1/31/2019 0:00 214586 Training Wastewater Collection Attend Cal-OSHA bi-weekly safety tailgate "Be prepared for an emergency".Completed 1/22/2019 0:00 215198 Training Wastewater Collection Train Vernon on Cartegraph Data entry for Utilities as well as Push Cam Video Uploading. n on Cartegraph entry, Video uploading with Completed 1/31/2019 0:00 215557 Training Wastewater Collection Training Vernon with jet rodding and Cartegraph.19 Training Vernon with jet rodding and Carte Completed 2/12/2019 0:00 215752 Training Wastewater Collection Training Vernon on unit 7 jet rodding.Completed 3/4/2019 0:00 215912 Training Wastewater Collection Attend Cal-OSHA bi-weekly safety tailgate meeting :Cutting pipe safely with power saws". Completed 2/21/2019 0:00 216192 Training Wastewater Collection ADS Environmental ECHO Flow Monitor Demonstration in Ops Lounge ADS Environmental ECHO Flow Monitor Demo Completed 2/27/2019 0:00 216312 Training Wastewater Collection Attend Cal-OSHA "Don't get in a bind with a backhoe" bi-weekly training.Completed 3/4/2019 0:00 216937 Training Wastewater Collection Attend Safety Rodeo at Crosthwaite Crosthwaite Material Yard. MJ was a demonst Completed 3/14/2019 0:00 216989 Training Wastewater Collection Attend Cal-OSHA bi-weekly tailgate "Stepladder safety"Completed 3/21/2019 0:00 221066 Training Wastewater Collection Training with supervisor on mark out on Pomerado and Stone Canyon Completed 3/26/2019 0:00 221744 Training Wastewater Collection Attend training in field to install and set up new ADS ECHO monitoring device in manhole xx-xxx-SM. Completed 4/10/2019 0:00 221884 Training Wastewater Collection Attend Cal-OSHA safety tailgate "Dog Wise: Safety with customers canines".Completed 4/16/2019 0:00 CITY OF POWAY DESIGN AND PERFORMANCE PROVISIONS City of Poway SSMP 1 Section 5.0 Design and Performance Provisions Sanitary Sewer Management Plan (SSMP) Section 5.0 Design and Performance (a) Design and construction standards and specifications for installation of new sanitary sewer systems, pump stations and other appurtenances; and for the rehabilitation and repair of existing sanitary sewer systems. The City of Poway has adopted the 2015 publication for the following specifications, details, and standards for construction: • Standard Specifications for Public Works Construction (THE GREENBOOK) • San Diego Regional Standard Drawings • City of Poway Supplemental Engineering Standards (b) Procedures and standards for inspecting and testing the installation of new sewers, pumps, and other appurtenances and for rehabilitation and repair projects. The City of Poway has adopted the 2015 publication for the following specifications, details, and standards for construction inspection: • Standard Specifications for Public Works Construction (THE GREENBOOK) • San Diego Regional Standard Drawings • City of Poway Supplemental Engineering Standards New Sewer Lift Station: Plans are pre-inspected from the start of the project thru the 100% (percent) submittals. The station is built according to the 100% drawings. A start-up test is set up with representatives from the pump, electrical and engineering contractors and Public W orks staff. The wet well is filled with potable water to test the alarms, then the pumps are placed in AUTO and the system tested to verify it runs as designed. Any failures are corrected and the test is re-run from the beginning. If the test is successful, the station is allowed to operate for the duration of the test, usually from 14 to 30 days. After successful completion of the test, the station is operated per design and manufacturer’s specifications. Rehabilitation of a station: Plans are pre-inspected from the start of the project thru the 100% (percent) submittals. The station is built according to the 100% drawings. A start-up test is set up with representatives from the pump, electrical, and engineering contractors, and Public Works staff. The alarms are tested, then the pumps are placed in AUTO and the system City of Poway SSMP 2 Section 5.0 Design and Performance Provisions is tested to verify it runs as designed. Any failures are corrected and the test is re-run from the beginning. If the test is successful, the station is allowed to operate for the duration of the test, usually from 14 to 30 days. The existing station is left online as a back-up in the event the new station fails (from 14 to 30 days). In the event the new station fails, the old station is placed back online until the problems can be fixed, at which time a new test will begin. The wet well continues to be online since raw sewage is still flowing into the system. If the wet well needs to be repaired or coated, a temporary pump may be installed in a manhole upstream of the station to move the sewage around the station until the wet well is finished. After successful completion of the test, the station is operated per design and manufacturer’s specifications. CITY OF POWAY OVERFLOW EMERGENCY RESPONSE PLAN City of Poway SSMP 1 Section 6.0 Overflow Emergency Response Plan Sanitary Sewer Management Plan (SSMP) Section 6.0 Overflow Emergency Response Plan Each Enrollee shall develop and implement an overflow emergency response plan that identifies measures to protect public health and the environment. At a minimum, this plan must include the following: (a) Proper notification procedures so the primary responders and regulatory agencies are information of all SSOs in a timely manner; (b) A program to ensure an appropriate response to all overflows; (c) Procedures to ensure prompt notification to appropriate regulatory agencies and other potentially affected entities (e.g., health agencies, Regional Water Boards, water suppliers, etc.) of all SSOs that potentially affect public health or reach the water of the State in accordance with the MRP. All SSOs shall be reported in accordance with this MRP, the California Water Code, other State Law, and other applicable Regional Water Board WDRs or NPDES permit requirements. The SSMP should identify the officials who will receive the notification; (d) Procedures to ensure that appropriate staff and contractor personnel are aware of and follow the Emergency Response Plan and are appropriately trained; (e) Procedures to address emergency operations, such as traffic and crowd control, and other necessary response activities; and (f) A program to ensure all reasonable steps are taken to contain and prevent the discharge of untreated and partially treated wastewater to waters of the United States and to minimize or correct any adverse impact on the environment resulting from the SSOs, including such accelerated or additional monitoring as may be necessary to determine the nature and impact of the discharge. See the included City of Poway Sewer Overflow Prevention Plan (SOPP) and Sewer Overflow Response Plan, Revised May 2019. SEWER OVERFLOW PREVENTION PLAN AND SEWER OVERFLOW RESPONSE PLAN CITY OF POWAY MAY 2019 1 SEWER OVERFLOW PREVENTION PLAN In compliance with the San Diego Regional Water Quality Control Board (RWQCB) Permit Order No.2006-0003-DWQ (SSS WDR) (Permit), the City of Poway will prevent, respond to, contain, and clean up all sewage and other spills that discharge to its municipal separate storm sewer system (MS4) from any source. In order to accomplish this, the City has developed specific spill prevention and spill response mechanisms described below. The Sewer Overflow Prevention Plan (SOPP) describes the sewer system and addresses the organization and major activities of the City of Poway’s wastewater operations. ORGANIZATION The City of Poway operates its wastewater system within the Department of Public Works. The maintenance of the sewage collection system is the responsibility of the Wastewater Collection Division and the Utility Systems Division. The sewage collection system includes the actual wastewater collection system and five sewer lift stations. The City of Poway maintains a full-time staff responsible for performing continuous preventative maintenance activities on the sanitary sewer system including traffic and crowd control during routine and emergency operations. Exhibit 1 presents the organizational chart of the Public Works divisions responsible for the operation and maintenance of the collection system. These positions are also responsible for emergency response and repair of the system. SEWAGE COLLECTION SYSTEM The City of Poway sewage collection system consists of 185.6 miles of pipeline, 4,017manholes, and five sewer lift stations. The system serves an estimated population of 49,986. The collection system delivers wastewater to the City of San Diego for treatment. The sewage collection system serves properties within the incorporated boundaries of the City of Poway and additional flows from the City of San Diego that are conveyed through a portion of Poway’s system. City of Poway’s average daily sewage flows are 2.3 mgd with an additional average daily flow of 1.4 mgd from the City of San Diego. The City of San Diego’s portion is deducted from Poway’s main meter for billing purposes. MAJOR OPERATIONAL ACTIVITES Preventive maintenance is often the most effective method of preventing SSO’s. The City of Poway actively maintains its sewer collection, lift station systems and MS4. The majority of the City’s sewage collection system is approximately 50 years old. The City has not experienced an SSO event related to capacity of the system. 2 Eighty-six mainline segments within the collection system area (for a total of approximately 21,641 lineal feet) have been identified for increased flushing. The City of Poway’s standard BMP for these mainline segments is to clean them monthly and quarterly due to grease buildup and root intrusion. The 86 mainline segments will continue to be evaluated for future capital improvement projects. Maintenance Activities • Monthly and quarterly cleaning of 86 mainline segments (21,641 lineal feet) • Annual mainline segment cleaning goal of 293,182 lineal feet • Annual mainline segment CCTV inspection of 205,227 lineal feet Infiltration and Inflow In addition to the rigorous maintenance schedule, the City’s spill prevention procedures are designed to prevent infiltration of seepage from sanitary sewer systems to MS4s. Addressing infiltration and inflow is one of the key goals of the Wastewater Collection Division. The City’s Infiltration and Inflow Study, prepared by Dudek and Associates, is completed. The study was started in the year 2000. Due to several seasons of low precipitation, the study was completed and submitted to the city in 2005. The City performed video inspection of areas identified in the study during the wet season to identify the location of the infiltration. Dudek and Associates analyzed the data and provided an action plan to decrease inflow and infiltration. In 2005, 6,296 lineal feet of 15-inch vitrified clay pipe on Community Road and 1,326 lineal feet of 8-inch vitrified clay pipe on Metate Lane were rehabilitated with CIPP to mitigate identified Inflow and Infiltration. Video Inspection In early 2019 the City has initiated a program to perform sewer mainline segment condition inspections to verify condition of VCP within the system. Staff has found older sections starting to fatigue to the point rehabilitation will be required to maintain an efficient and effective system. Collection System, Capital Improvements Program • The Sanitary Sewer Master Plan (SSMP) was completed by Atkins North America Inc. in 2013. The SSMP objectives were to evaluate the capacity of Poway’s conveyance system and provide a general assessment of the condition of the existing sewer collection system, including its sewer lift stations, in order to develop a recommended comprehensive 10-year Capital Improvement Program (CIP). 3 • The City continues to evaluate existing manholes for potential candidates for the on-going Manhole Rehabilitation Program. To date the City’s asset management program has identified 1,348 of the 4,024 rehabilitated with a liner system to date. SEWAGE PUMPING STATIONS The City of Poway has five sewer lift stations for sewage pumping. The following three sewer lift stations have been completely rehabilitated; • St. Andrews lift station completed 2011 • Highlands Ranch lift station completed 2009 • Camino Del Valle lift station completed 2003 Chopper pump in wet wells were added to; • Old Coach lift station in 2015 • St. Andrews lift station in 2015 Preventive Maintenance Actions • Daily Physical Checks – all five lift stations inspected as per guide list provided for each station (daily checks are accomplished Monday through Friday). • Electronic Monitoring – stations are real-time monitored (SCADA) via telemetry lines. All stations are equipped with high wet well; pump failure, and dry well flooding alarms. In addition, all stations are equipped with override controls. Sewer lift stations are currently undergoing improvements adding auxiliary power via generators to mitigate power failure. • Weekly Physical Checks – detailed well inspection. • Monthly Physical Checks – test all components (pumps, valves, alarms, bubblers) and verify all alarm system set points. • Record Efforts on Monthly Check-off Form – document discrepancies using maintenance software. Update monthly run hour meter log and computerized maintenance files. • Water Treatment Plant staff monitor lift stations around the clock through real- time SCADA displays maintained at the plant. 4 SEWER OVERFLOW RESPONSE PLAN WASTEWATER COLLECTION SYSTEM NOTIFICATION During regular working hours, the Wastewater Collection staff is notified of overflows by the public or a City staff member. The reports are called in to the Public Works Maintenance Operations Office and are immediately reported to the Wastewater Collection Division Supervisor. During off-duty hours, reports of overflows are called in to the Water Treatment Plant. The staff at the Water Treatment Plant immediately calls the wastewater collection on-call worker or standby person. (Exhibit 1). IMMEDIATE ACTION During regular working hours, staff and a Vactor truck is immediately dispatched to the scene to clear the blockage, and provide traffic and crowd control when necessary. Recovery crews are dispatched as needed. During off-duty hours, the standby employee responds and calls out crews as needed. A Supervisor is called as soon as possible. An additional Vactor is dispatched for containment as needed. GUIDELINES The City of Poway implements all remedial actions to the extent that they are applicable to the discharge, including the following: • Interception and rerouting of sewage flows around the sewage line failure; • Vactor truck recovery of sanitary sewer overflows and wash down water utilizing appropriate containment BMP’s; (Exhibit 4) • Perform mandatory SSO reporting in accordance with the State Water Resources Control Board’s guide for Sanitary Sewer Overflow Reduction Program, Cal OES, and the San Diego County Health Department utilizing DKF Solutions, SMART Sewer Overflow Volume Estimation Workbook for volume estimations. • Cleanup of debris of sewage origin at the overflow site and additional monitoring when required. Removal of the blockage is the priority, followed by efforts to contain and recover the overflow. The affected area is disinfected and receives a wash down. All wash downs are contained and recovered by a Vactor. All line segments involved in the overflow are inspected by the division’s TV crew. Bilingual warning signs may be posted depending upon the boundaries of the spill. Notification is conducted in accordance with the attached procedures and report form for overflows (Exhibits 2, 3). 5 SEWER OVERFLOW RESPONSE PLAN PUMP STATIONS NOTIFICATION During regular working hours, the Wastewater Pumping Division and the Utility Systems staff are notified of any pumping station malfunction by the Water Treatment Plant staff that monitors all incoming pump station alarms. During off-duty hours, alarms are also monitored by the Water Treatment Plant staff. In the event of a pump station malfunction, the duty operator will immediately dispatch the Treatment Plant on-call worker or standby person (Exhibit 1). IMMEDIATE ACTION During regular working hours, the Vactor Crew is dispatched to the site to pump down the wet well and keep it from overflowing. A repair crew is also dispatched to assess and make the necessary repairs to put the station back into operation. During after- hours, the standby employee responds and calls out the necessary crews. The Utility Systems Supervisor is notified as soon as possible. GUIDELINES The priority is to prevent any new blockage and SSO, containing and recovering overflows utilizing appropriate containment BMP’s (Exhibit 4). Concurrent to this process, the repair of the station is of vital importance. All areas exposed to overflow are disinfected and receive a wash down. Bilingual warning signs may be posted depending upon the boundaries of the spill. The Vactor Crew will remain at the site until the sewer lift station is put back into service. Notification will be done in accordance with the attached procedures and report form for overflows (Exhibits 2, 3). M:\\ WATER UTILITIES\Sewer System\SSMP\SSMP2019 Update\ Section 6 Overflow Emergency Response Plan City of Poway Public Works Wastewater Division Sewer Overflow Prevention Plan Contact Information Office # 858-668-4783 Radio Moniker: Util 04 Radio Moniker: Sugar 07 Wastewater Utilities Crew Leader Chad Fried (LRO) Cell # 858-243-8438 Radio Moniker: Sugar 02 Wastewater Utilities Crew Leader Amjad "MJ" Mohamad (LRO) Cell # 858-395-1609 Radio Moniker: Sugar 03 Wastewater Utility Worker I Chad Weigel Irving Echeverria Vernon Fitzpatrick Radio Moniker: Sugar 05 Radio Moniker: Sugar 06 Wastewater Utilitiy Worker I Ivan Martinez Radio Moniker: Sugar 04 Wastewater Utility Worker I Wastewater Utility Worker I Office # 858-668-4719 Cell # 858-243-5616 Radio Moniker: Sugar 01 City of San Diego SSMP Contact Infromation Central Operations Management Center Staffed 7-24 for SPS and Flow Meter Alarms Contact # 858-614-4551 Wastewater Utilities Supervisor Office # 858-668-4754 Radio Moniker: Util 01 Cell # 760-703-4770 Terry Zaragoza(LRO) Utilities System Supervisor Frank Dumbrique Administrative Assistant III Kathy Makepeace Office: # 858-668-4715 Radio Moniker: Station Bravo Cell # 760-420-5571 Radio Moniker: Admin 03 Jason Rice Office # 858-668-4756 Radio Moniker: Util 06 Director of Public Works Mike Obermiller Office # 858-668-4722 Radio Moniker: Admin 01 Gil Aguilar Office # 858-668-4758 Radio Moniker: Util 05 Utility Systems Mechanic Office # 858-668-4755 Radio Moniker: Util 02 Assistant Director of Public Rudy Guzman Office # 858-668-4750 City Engineer Tom Frank Office # 858-668-4603 Radio Moniker: Util 03 Utility Systems Mechanic Sr. Utility Systems Tech After Hours Emergency Response Contact Water Treatment Plant Operator Office # 858-668-4751 Radio Moniker: Station Tango Tom Moylan Sr. Utility Systems Mechanic Barry Medlin Office # 858-668-4762 Sr. Utility Systems Tech Chau "Donny" Tran Office # 909-825-7693 Fax # 909-825-7696 Dispatch Center for Emergencies Clinical Laboratory of San Bernardino Inc. Additional Monitoring Laboratory Contact Robin Glenney Station 38 (06:00 - 23:00) Contact # 619-515-3525 Fire Dispatch (23:00 - 06:00) Contact # 858-974-0275 Exhibit 1 Updated May 2019 M:\WATER UTILITIES\SSMP 2019 Draft\SSMP 2019 Update Draft\Section 6 Overflow Emergency Response 2019 Final\5 Exhibit 2_Regulatory Reporting Guide 2019.docx Regulatory Reporting Guide Detailed information on each SSO is submitted by enrollees in the SSO report. Enrollees are required to report all SSOs that result from a failure or flow condition in any portion of a sanitary sewer system under their ownership or management. For the purposes of reporting, SSOs fall into one of the three categories: Category 1, Category 2, and Category 3. The definitions for each Category are listed in Table 1, below. CATEGORIES DEFINITIONS Category 1 Discharges of untreated or partially treated wastewater of any volume resulting from an enrollee's sanitary sewer system failure or flow condition that: Reach surface water and/or reach a drainage channel tributary to a surface water; or Reach a municipal separate storm sewer system and not fully captures and returned to the sanitary sewer system or not otherwise captured and disposed of properly. Any volume of wastewater not recovered from the municipal separate storm sewer system is considered to have reached surface water unless the storm drain system discharges to a dedicated storm water or ground water infiltration basin (e.g., infiltration pit, percolation pond). Category 2 Discharges of untreated or partially treated wastewater of 1,000 gallons or greater resulting from an enrollee's sanitary sewer system failure or flow condition that do not reach surface water, a drainage channel, or a municipal separate storm sewer system unless the entire SSO discharge to the storm drain system is fully recovered and disposed of properly Category 3 All other discharges of untreated or partially treated wastewater resulting from an enrollee’s sanitary sewer system failure or flow condition. Private Lateral Sewage Discharge (PLSD) Discharge of untreated or partially treated wastewater resulting from blockages or other problems within a privately owned sewer lateral connected to the enrollee’s sanitary sewer system or from other private sewer assets. PLSDs that the enrollee becomes aware of may be voluntarily reported to the SSO Database. Table 1 – Spill Categories and Definitions The reporting deadline for submittal of a SSO report depends on the classification of the spill as shown in Table 2. For Category 1 and 2 SSOs, the enrollee must submit an initial, draft report of the SSO as soon as possible but no later than 3 business days after becoming aware of the SSO. The final, certified report for Category 1 and 2 SSOs must be submitted within 15 calendar days of the SSO end date. For Category 3 SSOs, the enrollee must submit a final, certified report (no initial, Draft report required) within 30 calendar days after the end of the calendar month in which the SSO occurred. For instance, if the SSO occurred on February 1st, the enrollee must certify the Category 3 SSO before March 30th M:\WATER UTILITIES\SSMP 2019 Draft\SSMP 2019 Update Draft\Section 6 Overflow Emergency Response 2019 Final\5 Exhibit 2_Regulatory Reporting Guide 2019.docx ELEMENT REQUIREMENT METHOD Notification Within 2 hours of becoming aware of any Category 1 SSO greater than or equal to 1,000 gallons notify the California Office of Emergency Services (Cal OES) and obtain a notification control number. Call Cal OES at: (800) 852-7550 Reporting Category 1 SSO: Submit Draft report within 3 business days of becoming aware of the SSO and certify within 15 calendar days of SSO end date. Category 2 SSO: Submit Draft report within 3 business days of becoming aware of the SSO and certify within 15 calendar days of SSO end date. Category 3 SSO: Submit Certified report within 30 calendar days of the end of month in which SSO occurred. “No Spill” Monthly Certification: Certify that no SSOs occurred within 30 calendar days of the end of the month in which no SSOs occurred. Collection System Questionnaire: Update and Certify every 12 months. Enter data into the California Integrated Water Quality System (CIWQS) Online SSO Database (http://ciwqs.waterboards.ca.gov/) , certified by enrollee’s Legally Responsible Official(s). Table 2 – Notification, Reporting, Monitoring, and Record Keeping Requirements Notification of Cal OES is required within two hours of becoming aware of a Category 1 SSO greater than or equal to 1,000 gallons that results or may result in a discharge to surface waters. Specifically, the enrollee shall, as soon as possible, but no later than two (2) hours after (A) the enrollee has knowledge of the discharge, (B) notification is possible, and (C) notification can be provided without substantially impeding cleanup or other emergency measures, notify the California Office of Emergency Services (Cal OES) and obtain a notification control number. With the exception of enrollees in the San Diego region, Private Lateral Sewage Discharges (PLSDs) are not required to be reported, but they can be voluntarily reported to the database. The State Water Board encourages enrollees to Notify Cal OES for PLSDs greater than or equal to 1,000 gallons that result or may result in a discharge to surface waters. No-spill Certifications are required within 30 days after the end of each calendar month if there are no SSOs during the calendar month. If there are no SSOs during a calendar month but the enrollee reported a PLSD, the enrollee must still file a “No Spill” certification statement for that month. Sanitary Sewer Overflow (SSO) Reporting Flow Chart Did SSO occur? (See SSO Response Flowchart) Was the spill caused by a problem in the public sewer or on private property? If no SSOs occurred during the calendar month, submit “No Spill” Certification to CIWQS within 30 calendar days of the end of the month or, if reporting quarterly, the quarter in which no SSOs occurred.* END NO PRIVATE PUBLIC YES Private lateral sewage discharge (PLSD) 1. Did the spill discharge to a surface water or in a location where it will probably discharge to a surface water? 2. OR did the spill reach a storm drain and could not be completely recovered? Category 1 SSO YES Did the spill equal or exceed 1,000 gallons? Within 2 hours**, report spill by phone (800) 852-7550 to the California Office of Emergency Services (Cal OES) and obtain notification control number.*** Did the spill equal or exceed 1,000 gallons AND discharge to a surface water or in location where it may discharge to a surface water? Notify Cal OES (800) 852-7550 1. Did the spill reach surface waters or drainage channel? 2. OR did the spill reach a storm drain and could not be completely recovered? 3. OR did the spill equal or exceed 1,000 gallons? Did the spill equal or exceed 1,000 gallons? NO Category 2 SSO Category 3 SSO NO YES Call RWQCB within 24 hours** NO YES NO YES Did the spill equal or exceed 50,000 gallons? Submit certified report using CIWQS within 30 calendar days of the end of the calendar month in which SSO occurred. Within 48 hours after initial SSO notification, conduct water quality sampling. Upload water quality results into CIWQS. Submit draft report using CIWQS**** within 3 business days of becoming aware of SSO. Certify report within 15 calendar days of SSO end date. NO YES Submit draft report using CIWQS**** within 3 business days of becoming aware of SSO. Certify report within 15 calendar days of SSO end date. Submit SSO Technical Report within 45 calendar days after SSO end date. END Call RWQCB within 24 hours** If considered a health hazard, report to applicable agencies. Report using CIWQS within 30 days after the end of the calendar month in which spill occurred. NO YES NOTES *Per Order 2013-0058-EXEC, if there are no SSOs during a calendar month but a PLSD was reported, a “No Spill” certification statement for that month should still be submitted. **After the Sewage Collection Agency becomes aware of the SSO, notification is possible, and notification can be provided without substantial impeding cleanup or other emergency measures. ***If applicable, update Cal OES regarding substantial changes to the estimated volume of the spill and any substantial changes to known impact(s) after initial notification and before SSO report is certified. ****If CIWQS is not available for any reason, information must be faxed or emailed to the San Diego RWQCB according to the time frame. CITY OF POWAY Public Works Department / Wastewater Collection 858/668-4719 or 668-4757 Fax: 858/679-8719 SANITARY SEWER OVERFLOW (SSO) REPORTING FORM WDID: 9SSO10656 CITY OF POWAY COLLECTION SYSTEM WAS SPILL REPORTED TO THE FOLLOWING AGENCIES? (Leave blank if not required.) STATE WATER RESOURCES CONTROL BOARD (CIWQS) Online Reporting CA RWQCB REGION 9 SAN DIEGO: 619/516-1994 (fax) 619/516-1990 (office phone) SAN DIEGO COUNTY / DEPT OF ENVIRONMENTAL HEALTH: 858/505-6786 (fax) CAL EMA (OES): 800/852-7550 (1,000+ GALS discharged into state waters or any spill that poses "significant hazard to human health & safety or the environment." YES YES YES This report is the: DRAFT REPORT FINAL REPORT PSLD SSO Spill Type: CATEGORY 1 CATEGORY 2 CATEGORY 3 LOCATION DETAILS Spill location name or ID: Latitude of spill location: Longitude of spill location: Address or street reference: City, State Zip County: Spill location description: Regional Water Quality CB: Region 9 SPILL DETAILS Spill appearance point: Spill appearance point explanation: Did spill discharge to drainage channel and/or surface water? Did spill reach a separate (i.e., not combined) storm drain pipe? YES NO YES NO If spill reached a separate storm- drain pipe, was all wastewater fully captured from the separate drain and returned to sanitary sewer system? YES NO N/A SPILL DETAILS (cont'd) Page 2 Private lateral spill? YES NO If private lateral spill, what is the name of the responsible party, if known: Final spill destination: Explanation of final spill destination: Estimated spill volume: Estimated volume of spill recovered: Estimated volume of spill that reached surface water(s), drainage channel, or NOT recovered from a separate stormdrain (or N/A): N/A Estimated current spill rate (if applicable): N/A Estimated spill START date/time: Date/time Poway Public Works staff was notified of or discovered spill: Estimated onsite arrival date/time: Estimated spill END date/time: Spill cause: Spill cause explanation (brief): Where did failure occur? Explain where failure occurred: Spill caused by wet weather? Diameter of sewer pipe at point of blockage or spill cause (if applicable) Sewer pipe material at point of blockage or spill cause (if applicable): Age (estimated) of sewer pipe at point of blockage or spill cause (if applicable): Describe terrain surrounding the point of blockage or spill cause (if applicable): N/A N/A N/A N/A YES N/A SPILL DETAILS (cont'd) Page 3 Spill response activities: Visual inspection results from impacted receiving water (or N/A): N/A Health warning signs posted? Impacted beach(es) (or N/A): YES NO N/A Enter Name Impacted surface water(s) (or N/A): N/A NOTIFICATION DETAILS OES Control Number (if applicable): Date/Time OES called (f applicable): Date/Time RWQCB notified: Method of notification and number: Date/Time County DEH notified: Method of notification and number: Was any of this spill report information submitted via fax or electronically to the RWQCB? If yes, enter date/time information was submitted to RWQCB. If no, leave box blank. (OES#) (date/time) YES NO N/A N/A Other remarks/comments: I swear under penalty of perjury that the information submitted in this report is true and correct. I certify under penalty of perjury that I have personally examined and am familiar with the information submitted in this document and all attachments and that, based on my inquiry of those individuals immediately responsible for obtaining the information, I believe that the information is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment. Signature: Print Name: Title: Date: Email (optional): SPILL DETAILS (cont'd) Page 3 CITY OF POWAY FOG CONTROL PROGRAM City of Poway SSMP 1 Section 7.0 FOG Control Program Sanitary Sewer Management Plan (SSMP) Section 7.0 FOG Control Program Requirements Each Enrollee shall evaluate its service area to determine whether a FOG control program is needed. If an Enrollee determines that a FOG program is not needed, the Enrollee must provide justification for why it is not needed. If FOG is found to be a problem, the Enrollee must prepare and implement a FOG source control program to reduce the amount of these substances discharged to the sanitary sewer system. This plan shall include the following as appropriate: (a) An implementation plan and schedule for a public education outreach program that promotes proper disposal of FOG; (b) A plan and schedule for the disposal of FOG generated within the sanitary sewer system service area. This may include a list of acceptable disposal facilities and/or additional facilities needed to adequately dispose of FOG generated within a sanitary sewer system service area; (c) The legal authority to prohibit discharges to the system and identify measures to prevent SSOs and blockages caused by FOG; (d) Requirements to install grease removal devices (such as traps or interceptors), design standards for the removal devices, maintenance requirements, BMP requirements, record keeping and reporting requirements; (e) Authority to inspect grease-producing facilities, enforcement authorities, and whether the Enrollee has sufficient staff to inspect and enforce the FOG ordinance; (f) An identification of sanitary sewer system sections subject to FOG blockages and establishment of a cleaning maintenance schedule for each section; and (g) Development and implementation of source control measures for all sources of FOG discharged to the sanitary sewer system for each section identified in (f) above. City of Poway SSMP 1 Section 7.0 FOG Control Program Sanitary Sewer Management Plan (SSMP) Section 7.0 fog Control Program City of Poway Public Works Department FOG Program (Fat, Oil, Grease) Summary of Rules and Regulations for Wastewater Discharge from Food Establishments The Poway Municipal Code (Chapters 13.04 and 13.05) and the adopted Uniform Plumbing Code give the City of Poway the authority for the FOG Program and should be referred to for complete requirements. The Poway Municipal Code can be referred to on the City’s web page: www.poway.org. The following is a summary of rules and regulations. Purpose of the FOG Program The FOG Program helps prevent sewer line blockages and spills. Wastewater sewer blockages or spills can cause harm to the environment and the community, resulting in costly cleanup and repairs. Any wastewater that enters a storm drain flows untreated into creeks, rivers, and the ocean, and can result in polluted water and closed beaches. The intent of the FOG Program is to eliminate the discharge of excess grease and oil into the wastewater collection system, minimize the potential formation of blockages to the flow of wastewater as a result of grease accumulations, and eliminate sewage spills that may result from such blockages. Industrial Wastewater Discharge Permit - Food Establishment Wastewater Discharge (FEWD) Permit All food establishments including, but not limited to, restaurants, delis, ice-cream parlors, commercial kitchens, etc., desiring to discharge wastewater into the City’s sewer system shall obtain a FEWD Permit from the Director of Public Works. Subject to Industrial Wastewater Limitations Wastewater discharged into the City sewer system from establishments engaged in preparing food for public consumption shall be subject to the limitations for Industrial Wastewater Discharge as set forth in Poway Municipal Code Chapters 13.05, as well as Chapter 13.04, the Uniform Plumbing Code, and other conditions and requirements as may be specified in the FOG Program and FEWD Permit. City of Poway SSMP 2 Section 7.0 FOG Control Program Permit Requirements The Food Establishment Wastewater Discharge Permit (FEWD Permit) may require pretreatment of wastewater prior to discharge, restriction of peak flow discharge, discharge of certain wastewater only to specified sewers of the City, or relocation of the point of discharge. Such requirements may also include prohibition of discharge of certain wastewater components, restriction of discharge to certain hours of the day, payment of additional charges to defray increased costs of the City created by the wastewater discharge, and such other conditions as may be required to achieve the purpose of the FOG Program. Discharge of Industrial Wastewater in excess of the quantity or quality limitations set by the FEWD Permit is prohibited. Applications for Food Establishment Wastewater Discharge (FEWD) Permit Applicants for a Food Establishment Wastewater Discharge (FEWD) Permit shall complete and file with the City of Poway Public Works Department an application in the form prescribed by the Director of Public Works. Information Requirements The applicant may be required to submit for evaluation the following information: a) Name and address of applicant, and 24-hour emergency telephone contact b) Service and site address c) Volume of wastewater to be discharged d) Time of daily food preparation operations e) Description of food preparation, type, and number of meals served, clean-up procedures, dining room capacity, number of employees, and size of kitchen f) Any other information deemed necessary by the Director of Public Works to evaluate the Permit application. Application Review and Approval The City will review the FEWD Permit application and may require the applicant to provide additional information in order to complete the review. Additionally, an on-site inspection of the wastewater discharge system, pretreatment systems, and any other systems relating to the wastewater discharge may be required. Upon final approval, the Director of Public Works will issue a Food Establishment Wastewater Discharge Permit, subject to the terms and conditions of the FOG Program, Poway Municipal Code, and Uniform Plumbing Code. City of Poway SSMP 3 Section 7.0 FOG Control Program Penalty for Violations Discharge of wastewater in any manner in violation of the Poway Municipal Code (PMC) Chapter 13.05 is a public nuisance. Whenever a discharge of wastewater is in violation of the PMC and/or FEWD Permit and FOG Program, the City may seek a petition to the Superior Court for the issuance of an injunction. The City may revoke any industrial wastewater discharge permit issued pursuant to Section 13.05.160 of the municipal code or terminate any wastewater service to any premises if a violation of any provision of the PMC (Chapter 13.05) is found to exist or threatens to cause a condition of contamination, pollution, or nuisance. Duration of the Permit Permits are issued for a specified time period, not to exceed five years before renewal application by the establishment. A permit may be issued for a period less than a year or may be stated to expire on a specific date. Terms and Conditions of the Permit The terms and conditions of the FEWD Permit may be subject to modification by the Director of Public Works in accordance with any changes in the discharge standard limitations or the prohibited discharge substances described. The discharger shall be informed of any proposed changes in the permit at least thirty (30) days prior to the effective date of change. Any modifications or new conditions in the permit shall include a time schedule for compliance as determined by the City. Permit is not Transferable Any sale, lease, transfer, or assignment of the premises or operation for which a FEWD Permit was issued shall require a new permit. A permit shall be issued only for a specific use or operation, and any new or modified conditions of operation shall require an amended or new permit. Revocation of Permit The Director of Public Works may revoke the FEWD Permit of any discharger who is found to be in violation of the FOG Program. The permit may also be revoked on the basis of the following violations: a) Failure to install grease pretreatment devices as required by the permit. b) Failure to fulfill reporting requirements or pretreatment maintenance as required by the permit. c) Refusal to grant reasonable access to the premises for the purpose of inspection or monitoring. d) Violation of a condition of the permit. City of Poway SSMP 4 Section 7.0 FOG Control Program Food Establishment Wastewater Discharge Requirements Grease Pretreatment Food establishment dischargers shall ensure that wastewater is acceptable for discharge into the City sewer system in accordance with the limitations established in PMC Chapters 13.04, 13.05, adopted Uniform Plumbing Code, and FOG Program. The Standard Maximum Effluent Concentration of grease and oil is 500 mg/L. Each discharger shall install a grease pretreatment device, of a type approved by the Director of Public Works, to remove grease from wastewater prior to discharge. Such device shall be located on the waste line leading from areas where grease may be introduced into the sewer system, such as sinks, drains, appliances, and other fixtures or equipment used in food preparation or the cleanup process. Each discharger shall also provide a collection drum or other container for the purpose of physically segregating all oils, greases, and greasy solids. No such collected grease shall be introduced into any drainage pipeline, public sewer system, or storm drain. The permit holder shall establish procedures for the discharger’s personnel to perform maximum segregation of oils, greases, and greasy solids, which shall be collected in a drum or container prior to discharging of washing or cleaning wastewater into the sewer system. Grease pretreatment devices shall be maintained in efficient operating condition by means of periodic removal of accumulated grease. Dischargers shall be responsible for the proper removal and disposal of material captured from grease pretreatment devices, and from collection drums used for segregating oils, greases, and greasy solids. Monitoring Reports and Grease Removal Maintenance Records The discharger shall keep records of grease pretreatment device cleaning, maintenance and grease removal, and report on such maintenance to the Public Works Department per FOG Program requirements. Dischargers shall also make the records available to City staff during normal business hours. Each food establishment holding a permit shall provide results of periodic measurements of its discharge, which is to include chemical analysis of oil and grease content and shall provide documentation of delivery of all grease and oil to a recycling or disposal contractor or facility. Documentation shall be in the form of a manifest from the transporter, or a receipt that identifies the date and volume, name of waste, address, phone, and contact person with contractor or facility. The Public Works Department, Wastewater Utilities Division, will review reports annually. Right of Entry City of Poway SSMP 5 Section 7.0 FOG Control Program No person shall interfere with, delay, resist, or refuse entrance to authorized City personnel attempting to inspect any wastewater generation, conveyance, or treatment facility connected directly or indirectly to the City’s wastewater system. The Director of Public Works shall provide adequate identification for all inspectors and authorized personnel, and they will identify themselves when entering property for inspection purposes or when inspecting the work of any contractor. Mainline Asset ID Main Size Pipe Type Lineal Feet Location Fequency Comments 6365WWMAIN 8''VCP 135 13301 Poway Road (5 Guys) Monthly Grease (FOG) 85' push north 6366WWMAIN 8''VCP 273 13302 Poway Road (5 Guys) Monthly Grease (FOG) 6367WWMAIN 8''VCP 263 13303 Poway Road (5 Guys) Monthly Grease (FOG) 1997WWMAIN/2139WWMAIN 10''VCP 470 Gate Dr/Poway Rd.Quarterly Grease (FOG)/pull east only/need traffic control 2031WWMAIN/2060WWMAIN 8''-10''VCP 728 Bowron Rd/Poway Rd.Quarterly Grease (FOG)/350' pull west/378' pull north/need traffic control 3217WWMAIN 8''VCP 220 Pomerado Rd (between Casa Avenida/Roberto Way)Quarterly Grease (FOG)/pull east 3206WWMAIN 8''VCP 220 Pomerado Rd (between Casa Avenida/Via Monte Claro)Quarterly Grease (FOG)/pull east 1631WWMAIN 8''PVC 230 York Ave Monthly Grease (FOG) 1632WWMAIN 8''VCP 350 York Ave Monthly Grease (FOG) 1725WWMAIN 8''VCP 235 York Ave Monthly Grease (FOG) 4296WWMAIN 8''VCP 160 York Ct.Monthly Grease (FOG) Monthly Locations 7 3284 Lineal Feet Cleaned Quarterly Locations 4 Identified Sanitary Sewer Sections subject to FOG Blockages/Cleaning Schedule CITY OF POWAY SYSTEM EVALUATION AND CAPACITY ASSURANCE PLAN City of Poway SSMP 1 Section 8.0 System Evaluation and Capacity Assurance Plan Sanitary Sewer Management Plan (SSMP) Section 8.0 System Evaluation and Capacity Assurance The Enrollee shall prepare and implement a capital improvement plan (CIP) that will provide hydraulic capacity of key sanitary sewer system elements for dry weather peak flow conditions, as well as the appropriate design storm or wet weather event. At a minimum, the plan must include: (a) Evaluation: Actions needed to evaluate those portions of the sanitary sewer system that are experiencing or contributing to an SSO discharge caused by hydraulic deficiency. The evaluation must provide estimates of peak flows (including flows from SSOs that escape from the system) associated with conditions similar to those causing overflow events, estimates of the capacity of key system components, hydraulic deficiencies (including components of the system with limiting capacity) and the major sources that contribute to the peak flows associated with overflow events; (b) Design Criteria: Where design criteria do not exist or are deficient, undertake the evaluation identified in (a) above to establish appropriate design criteria; (c) Capacity Enhancement Measures: The steps needed to establish a short- and long- term CIP to address identified hydraulic deficiencies, including prioritization, alternatives analysis, and schedules. The CIP may include increases in pipe size, I/I reduction programs, increases and redundancy in pumping capacity, and storage facilities. The CIP shall include an implementation schedule and shall identify sources of fund; and (d) Schedule: The Enrollee shall develop a schedule of completion dates for all portions of the capital improvement program developed in (a)-(c) above. This schedule shall be reviewed and updated consistent with the SSMP review and update requirements. Reference the included February 2013 CD, City of Poway Sanitary Sewer Master Plan. CITY OF POWAY SANITARY SEWER MASTER PLAN February 2013 Prepared for: City of Poway 13325 Civic Center Drive Poway, California 92064 Prepared by: 3570 Carmel Mountain Road, Suite 300 San Diego, California 92130 Atkins Project No.: 100021812 ______________________________ Carmen C Kasner, PE Project Manager i City of Poway Sanitary Sewer Master Plan February 2013 Contents Chapter 1 Introduction ...................................................................................................... 1-1 1.1 Sewer Master Plan Objectives ................................................................ 1-1 1.2 Report Organization................................................................................ 1-1 1.3 Background............................................................................................. 1-2 1.4 Regulatory Requirements ....................................................................... 1-4 1.5 Environmental Compliance ..................................................................... 1-4 Chapter 2 Study Area ........................................................................................................ 2-1 2.1 Study Area Description ........................................................................... 2-1 2.2 Potential Impacts to the Sanitary Sewer System .................................... 2-3 2.3 Land Uses............................................................................................... 2-6 2.4 Existing and Forecasted Populations ................................................... 2-10 2.5 Existing Sanitary Sewer System ........................................................... 2-10 2.6 Regional Sewerage Facilities ............................................................... 2-11 Chapter 3 Wastewater Generation Analysis .................................................................... 3-1 3.1 Flow Meters ............................................................................................ 3-1 3.2 Wastewater Generation Rates ................................................................ 3-7 3.3 Wastewater Flow Projections ............................................................... 3-12 3.4 Metro Capacity...................................................................................... 3-13 3.5 Conclusions .......................................................................................... 3-14 Chapter 4 Capacity Evaluation ......................................................................................... 4-1 4.1 Background............................................................................................. 4-1 4.2 Methodology ........................................................................................... 4-1 4.3 Flow Monitoring ...................................................................................... 4-1 4.4 Limitations of Hydraulic Modeling ........................................................... 4-2 4.5 Evaluation Criteria .................................................................................. 4-2 4.6 Model Development ................................................................................ 4-3 4.7 Model Loading ........................................................................................ 4-3 4.8 Model Calibration .................................................................................... 4-7 4.9 Capacity Analysis ................................................................................. 4-17 Chapter 5 Operations and Maintenance Evaluation ....................................................... 5-1 5.1 Background............................................................................................. 5-1 5.2 Approach ................................................................................................ 5-1 5.3 Review of Cleaning/Preventative Maintenance Program ....................... 5-2 5.4 Review of Physical Inspection and Assessment ..................................... 5-4 5.5 Identification and Elimination of Inflow and Infiltration ............................ 5-8 5.6 Review of Other System Components and Issues ................................. 5-9 5.7 Lift Station Assessment .......................................................................... 5-9 5.8 Odor Assessment ................................................................................. 5-12 5.9 Oak Knoll Siphon .................................................................................. 5-12 Contents ii City of Poway Sanitary Sewer Master Plan February 2013 Chapter 6 Proposed Capital Improvement Projects ....................................................... 6-1 6.1 Development of Unit Costs ..................................................................... 6-1 6.2 Priority Sanitary Sewer Improvement Projects ....................................... 6-2 6.3 Recommended Improvements ................................................................ 6-3 6.4 Condition Related Improvement Projects ............................................... 6-7 6.5 Recommended CIP ................................................................................ 6-8 Appendices Appendix A Gravity System Detailed Breakdown Appendix B ADS Flow Metering Report and Data Appendix C Calibration Tables Appendix D Model Basin Population Projections and Diurnal Patterns Appendix E Lift Station System Head Curves Appendix F Technical Memorandum No. 1 – Satellite Treatment Plant Study Appendix G H2S Analysis Contents iii City of Poway Sanitary Sewer Master Plan February 2013 Figures Figure 1-1 Project Location .................................................................................................. 1-3 Figure 2-1 Study Area .......................................................................................................... 2-2 Figure 2-2 Distribution of Parcels ........................................................................................ 2-4 Figure 2-3 Service Areas ..................................................................................................... 2-5 Figure 2-4 Existing Land Use .............................................................................................. 2-8 Figure 2-5 Planned Land Use .............................................................................................. 2-9 Figure 2-6 Existing Sewer System ..................................................................................... 2-12 Figure 2-7 Existing Gravity Mains Pipeline Age ................................................................. 2-13 Figure 2-8 Existing Gravity Mains Pipeline Material .......................................................... 2-14 Figure 2-9 Regional Sewerage Facilities ........................................................................... 2-15 Figure 3-1 Flow Meter Locations ......................................................................................... 3-2 Figure 3-2 Flow Meter Schematic ........................................................................................ 3-4 Figure 3-3 Major Sewer Basins ........................................................................................... 3-5 Figure 4-1 Modeled Basins .................................................................................................. 4-4 Figure 4-2 December 2010 Rainfall Intensity-Duration-Frequency Curve ........................... 4-6 Figure 4-3 Meter PO-2 Wet Weather Flow Assessment ...................................................... 4-6 Figure 4-4 Dry Weather Calibration at Meter PO-1.............................................................. 4-8 Figure 4-5 Dry Weather Calibration at Meter PO-3.............................................................. 4-8 Figure 4-6 Dry Weather Calibration at Meter PO-5.............................................................. 4-9 Figure 4-7 Dry Weather Calibration at Meter PO-4.............................................................. 4-9 Figure 4-8 Dry Weather Calibration at Meter PO-6............................................................ 4-10 Figure 4-9 Dry Weather Calibration at Meter A.................................................................. 4-10 Figure 4-10 Dry Weather Calibration at Meter B.................................................................. 4-11 Figure 4-11 Dry Weather Calibration at Meter C ................................................................. 4-11 Figure 4-12 Dry Weather Calibration at Meter D ................................................................. 4-12 Figure 4-13 Dry Weather Calibration at Meter E.................................................................. 4-12 Figure 4-14 Dry Weather Calibration at Meter PO-2............................................................ 4-13 Figure 4-15 Wet Weather Calibration at Meter PO-1 ........................................................... 4-14 Figure 4-16 Wet Weather Calibration at Meter PO-3 ........................................................... 4-14 Figure 4-17 Wet Weather Calibration at Meter PO-5 ........................................................... 4-15 Figure 4-18 Wet Weather Calibration at Meter PO-4 ........................................................... 4-15 Figure 4-19 Wet Weather Calibration at Meter PO-6 ........................................................... 4-16 Figure 4-20 Wet Weather Calibration at Meter PO-2 ........................................................... 4-16 Figure 4-21 8-inch Siphon under Modeled Existing Flows ................................................... 4-21 Figure 4-22 15-inch Siphon under Modeled Existing Flows ................................................. 4-22 Figure 4-23 18-inch Siphon under Modeled Existing Flows ................................................. 4-22 Figure 4-24 Gravity Pipeline Identified Deficiencies ............................................................ 4-25 Figure 5-1 H2S Readings Manhole V3-001 Old Siphon Inlet ............................................. 5-14 Figure 6-1 Proposed CIP Projects ....................................................................................... 6-4 Contents iv City of Poway Sanitary Sewer Master Plan February 2013 Tables Table 2-1 Study Area .......................................................................................................... 2-1 Table 2-2 Service Area ....................................................................................................... 2-4 Table 2-3 Existing Land Use .............................................................................................. 2-7 Table 2-4 Planned Land Use .............................................................................................. 2-7 Table 2-5 Existing and Forecasted Populations ............................................................... 2-10 Table 2-6 Lift Stations ....................................................................................................... 2-11 Table 2-7 Force Mains ...................................................................................................... 2-11 Table 3-1 Sanitary Sewer Flows by Meter .......................................................................... 3-1 Table 3-2 Poway Metered Sewer Flows by Basin .............................................................. 3-3 Table 3-3 Wastewater Unit Generation Rate Calibration based on Population .................. 3-8 Table 3-4 Wastewater Unit Generation Rate Calibration based on Land Use ................... 3-9 Table 3-5 Recommended Unit Generation Rates............................................................. 3-11 Table 3-6 Study Area Flow Projections through 2050 (by Population) ............................. 3-12 Table 3-7 Study Area Flow Projections through 2050 (by Land Use) ............................... 3-12 Table 4-1 Recommended Evaluation Criteria ..................................................................... 4-2 Table 4-2 Dry Weather Calibration Summary ..................................................................... 4-7 Table 4-3 Wet Weather Calibration Summary .................................................................. 4-17 Table 4-4 Lift Station Pumping Capacities ....................................................................... 4-18 Table 4-5 Force Main Capacities ...................................................................................... 4-18 Table 4-6 Lift Station Storage Capacities ......................................................................... 4-18 Table 4-7 Model Predicted Existing Flows in Siphon ........................................................ 4-21 Table 4-8 Gravity Pipeline Identified Deficiencies by Model Condition ............................. 4-23 Table 5-1 H2S Readings ................................................................................................... 5-14 Table 6-1 Pipeline Unit Costs ............................................................................................. 6-2 Table 6-2 Recommended Pipeline Improvement Projects ................................................. 6-5 Table 6-3 Poway Capital Improvement Projects................................................................. 6-9 v City of Poway Sanitary Sewer Master Plan February 2013 Acronyms ABS Acrylonitrile Butadiene Styrene Pipe ACP Asbestos Cement Pipe CEQA California Environmental Quality Act CI Cast Iron Pipe CIP Capital Improvement Program City City of Poway d/D ratio depth to pipe diameter DIP Ductile Iron Pipe DU dwelling unit EIR Environmental Impact Report fps feet per second gpd/ac gallons per day per acre gpd/du gallons per day per dwelling unit gpm gallons per minute H2S hydrogen sulfide gas HARRF Hale Avenue Resource Recovery Facility HDPE High Density Polyethylene Pipe LS Lift Station Master Plan Sanitary Sewer Master Plan MBR membrane bioreactor Metro San Diego’s Metropolitan Wastewater System mgd million gallons per day PVC Poly-Vinyl Chloride Pipe RCP Reinforced Concrete Pipe RDI&I Rainfall derived inflow and infiltration SANDAG San Diego Association of Governments SFR DU Single-Family Residential Dwelling Units SPS Sewer Pump Station SSMP Sanitary Sewer Management Plan SWRCB State Water Resources Control Board VCP Vitrified Clay Pipe WDRs Waste Discharge Requirements Acronyms vi City of Poway Sanitary Sewer Master Plan February 2013 This page intentionally left blank. 1-1 City of Poway Sanitary Sewer Master Plan February 2013 Chapter 1 Introduction The City of Poway (City or Poway) is updating their Sanitary Sewer Master Plan (Master Plan), previously conducted in 2000, for its sewer service area. Poway is seeking an update to the Master Plan to reflect growth in development, modifications to the wastewater system, and ongoing water conservation efforts. This introductory chapter to the Master Plan provides a summary of the: Master Plan Objective Contents and Organization of this Report Background Information about Poway’s sanitary sewer system Overview of Regulatory Requirements Environmental Compliance and Policy Considerations 1.1 Sewer Master Plan Objectives The objectives of this Master Plan are to evaluate the capacity of Poway’s conveyance system, provide a general assessment of the condition of the existing sewer collection system, including its pump stations, in order to develop a recommended comprehensive 10-year Capital Improvement Program (CIP). The Master Plan also includes evaluating the cost-effectiveness of a potential satellite wastewater treatment plant. The 10-year CIP includes pipeline and pump station condition and capacity improvement projects, long range maintenance program enhancements and regional treatment and transportation needs and opportunities. This recommended CIP forms the basis for capital facility needs, sewer rate evaluations, and long- range financial plans to be completed in separate financial studies. 1.2 Report Organization This Master Plan provides a comprehensive review and evaluation of Poway’s wastewater collection, conveyance, and capacity requirements under existing and future conditions. Based on findings of the evaluation, the Master Plan recommends facility improvements and identifies capital cost requirements to ensure aging infrastructure remains serviceable and to allow for additional growth within Poway. The Master Plan is presented in six (6) chapters: Chapter 1 provides an introduction to the project. Chapter 2 presents an overview of the study area and existing sanitary sewer collection facilities. Chapter 3 presents an overview of the sewer basins and provides estimates of future wastewater generation rates and regional treatment capacity requirements. Introduction 1-2 City of Poway Sanitary Sewer Master Plan February 2013 Chapter 4 presents the methodology and findings of the sewer capacity evaluation, including summaries of hydraulic computer models used to analyze flow conditions. Chapter 5 presents a general condition assessment of Poway’s sanitary sewer system and pump stations, an assessment of potential odors and corrosion resulting from potential hydrogen sulfide gas generation, an assessment of inspection and maintenance procedure, and identifies specific opportunities for enhancement based on condition assessments, as well as providing recommendations for enhancements to Poway’s Maintenance Program. Chapter 6 presents a recommended 10-year CIP for Poway’s sanitary sewer facilities. 1.3 Background The City of Poway is located in northeast San Diego County, as shown in Figure 1-1, and is spread out over 39.4 square miles. Poway was historically an agricultural area with many farms, orchards and vineyards. Residential growth within Poway occurred in the 1950’s once Poway Valley Homes opened its first subdivision. In 19 80, Poway incorporated as a full-service, general law city, operating under the Council/Manager form of government. Poway is committed to the preservation of natural open spaces and is home to over 4,700 acres of open space, 82 miles of trails, and 25 parks. Poway features a mixture of residential and commercial properties. There are more than 16,000 housing units within the City limits, with 80 percent of the housing units being single family residences. Poway currently has a residential population of approximately 50,000 people. Poway also has a large commercial area known as the Poway Business Park. This 700 acre commercial area is home to nearly 500 businesses which, with the rest of Poway’s commercial areas, employ approximately 31,000 employees. The Poway Municipal Water District originated in 1954 to purchase and provide water to Poway. In 1959, the Pomerado County Water District formed to provide sewer service along the Pomerado Road corridor. When Poway was incorporated in 1980, the two entities were incorporated and the City of Poway Public Works Department assumed responsibility for all utility operations. Poway provides sanitary sewer service within its City limits, predominantly serving the western areas of Poway. In general, developments in the eastern areas of Poway are served by on-site septic systems. Additionally, Poway provides sewer service to some neighborhoods located within City of San Diego boundaries. Approximately 25 percent of the total wastewater flows conveyed through the sewer system are from the City of San Diego. The majority of flows from Poway drain to the City of San Diego’s Metropolitan Wastewater System (Metro) under a comprehensive Regional Wastewater Disposal Agreement and are metered at Meter PO-2 along Poway Road. Two small areas (approximately 6 percent of Poway’s total sanitary sewer flow) in the northwest area of Poway flow north through the Rancho Bernardo Trunk Sewer to the Hale Avenue Resource Recovery Facility (HARRF) in Escondido. !"_$ ?z !"_$ ?À !"^$ %&s( !"a$ !"a$ ?©?ª !"^$?© ?À AÛ?§ %&s( U S A M E X I C O Pacific Ocean Aù R I V E R S I D E C O U N T Y S A N D I E G O C O U N T Y O R A N G E C O U N T Y ?h ?t EL CAPITAN RESERVOIR LAKE HODGES BARRETT LAKE SAN VICENTE RESERVOIR OTAY RESERVOIR SUTHERLAND RESERVOIR LOVELAND RESERVOIR LAKE MURRAY LAKE WOHLFORD MIRAMAR RESERVOIR San Diego Poway Carlsbad Oceanside Escondido Vista Coronado Santee San Marcos Chula Vista Encinitas El Cajon J LaMesa NationalCity ImperialBeach LemonGrove SolanaBeach DelMar County Of San Diego Incorporated City 2/5/2013 LH SD Z:\Projects\IS\Poway\SewerMP\mxd\21812_PSMP_ProjectLocation_Fig 1-1.mxd ¯ 8 Miles Sanitary Sewer Master Plan February 2013 Project Location Figure 1-1 City of Poway Introduction 1-4 City of Poway Sanitary Sewer Master Plan February 2013 1.4 Regulatory Requirements On May 2, 2006, the State Water Resources Control Board (SWRCB) adopted Order 2006- 0003 for statewide Waste Discharge Requirements (WDRs) requiring all federal and state agencies, municipalities, counties, districts, and other public entities that own or operate a sanitary sewer system greater than one (1) mile in length to comply with the elements of the WDRs. The WDRs serve to provide a unified statewide approach for reporting and tracking sanitary sewer overflows, establishing consistent and uniform requirements for the Sanitary Sewer Management Plan (SSMP) development and implementation, establishing uniformity in reporting, and facilitating consistent enforcement for violations. Additionally, the WDRs require that the SSMP include directives for owners and operators of sanitary sewer systems to demonstrate effective and efficient management, operation and maintenance of the sanitary sewer system. Poway recognizes the importance of preventing sewage spills for the mutual protection of its surface waters and the overall environment to safeguard public health and safety. Therefore, in compliance with State WDR requirements, Poway prepared an SSMP that includes various plans and programs that are reflective of Poway’s existing processes and procedures pertaining to Poway’s sanitary sewer collection system. The City of Poway Wastewater Utilities Division’s overall work plan includes six (6) primary activities: Administration and Training Video Inspection of Wastewater Collection System Wastewater Discharge Requirements and Vactor Flushing and Rodding Program Wastewater Utility and Easement Program Fats, Oils, and Grease (FOG) Program Smoke Testing A summary of the tasks and objectives identified for each primary activity is included in Poway’s SSMP. To establish an understanding of Poway’s current operation and maintenance procedures pertaining to the wastewater collection system, Atkins conducted a review of Poway’s SSMP and met with operations staff to discuss inspection and maintenan ce measures implemented by the Wastewater Utilities Division staff in conformance with industry best-in-class practices. Chapter 5 includes a summary of the activities currently performed by the Wastewater Utilities Division staff and provides recommendations to supplement Poway’s current efforts. 1.5 Environmental Compliance Poway’s Master Plan is statutorily exempt from the preparation of an Environmental Impact Report (EIR) or a Negative Declaration per Section 15262 of the California Environmental Quality Act (CEQA) guidelines. However, the approval of specific improvement projects identified in this Master Plan represents a discretionary action by Poway, which is subject to review under CEQA. 2-1 City of Poway Sanitary Sewer Master Plan February 2013 Chapter 2 Study Area This chapter provides a description of the Master Plan study area including: Potential impacts to the existing sanitary sewer system; Existing and planned land uses; Existing and projected populations; Physical attributes of the sanitary sewer system; and Regional sewerage facilities serving Poway. 2.1 Study Area Description The City of Poway is located in northern San Diego County, approximately three miles east of Interstate 15 and just west of Highway 67. Poway is approximately 25 miles north east of the San Diego International Airport. Terrain ranges in elevation from 450 to 2,700 feet. The Poway LAFCO sphere of influence boundary, last affirmed in March 2008, generally aligns with the Poway boundary except in two locations along the eastern portion of Poway where it extend s beyond the Poway boundary. The City of Poway service area includes both developed and undeveloped areas and encompasses 39.4 square miles. Poway conveys wastewater flows generated within its boundary as well as flows generated from bordering areas within the City of San Diego. The study area for this Master Plan includes Poway’s jurisdictional boundary, the sphere of influence extensions into the County of San Diego and the portions of the City of San Diego that convey wastewater flows to Poway’s sanitary sewer system. Table 2-1 summarizes the study area component coverage and Figure 2-1 presents the study area for the Master Plan. The City of Poway can be generally divided into a western and eastern portion. The western portion of Poway is predominantly built out and is either connected to the existing sewer system or in close proximity to it. The eastern portion of Poway is generally ru ral and utilizes on-site septic systems for sewer disposal. This Master Plan assumes that parcels in the City of San Diego that drain to Poway’s sewer system are connected to the existing sewer system and are not on septic systems. The portion of the County of San Diego within the study area is generally rural and utilizes on-site septic systems for sewer disposal. Table 2-1 Study Area Area Square Miles Percentage of System Area City of Poway 39.4 84.7% City of San Diego 3.8 8.2% County of San Diego 3.3 7.1% Study Area Total 46.5 100% !!!! ! !!!!!!!!!! !! !! !!!! ! !!! !! !!!!!! !! !!!! !! !!!! !! !!!!!! !!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!! ! ! !!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!! ! ! !! !! !! !!!!!!!!!!!!!! !! !!!!!!!!!!!!!!!!!!! ! !!! ! !! ! ! ! ! ! ! !! !! !! !!!! !! !! !! !!!!!!!!!!!!!!!!!!!! !! !!!!!! !! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!! !!!! !! !! !!!! !!!!!! ! ! !!!!!!!!!!!!! ! !!!!!! ! ! ! ! ! !! !! !!!!!!!!!!!!!!!!!!!!!!!!!!! ! !! ! ! !!! ! ! ! S Miramar Reservoir Lake Hodges Lake Poway City of San Diego Escondido Poway County of San Diego Santa Maria Creek L o s P e n a s q u it o s C a n y o n Santa Ys abel Creek S y c a mo r e C r e e k C re e k Beeler Canyon C re e kPomerado RdPoway Rd Highland Valley Rd Espola RdW Bernardo DrScripps Poway Pkwy Twin Peaks Rd C a mino Del N orte Community RdTedGarden Rd Archi e Moore RdPoway Rd !"a$ ?z William s P k w y P o w a y R d H ighland Valley Rd 2/5/2013 LH SD Z:\Projects\IS\Poway\SewerMasterPlan\mxd\21812_PSMP_Study Area_F2-1.mxd Study Area Figure 2-1 ¯ 7,000 Feet Sanitary Sewer Master Plan February 2013 Study Area Poway Sphere of Influence City of Poway County of San Diego City of San Diego City of Escondido City of Poway Study Area 2-3 City of Poway Sanitary Sewer Master Plan February 2013 2.2 Potential Impacts to the Sanitary Sewer System Poway provides sanitary sewer service to developed parcels within the City boundary. Within the current City boundary, approximately 90 percent of developed parcels connect to the sewer system, with the remaining parcels either vacant or on septic systems. City of San Diego properties within the sewer basins draining to the Poway system were all assumed to be connected to the sewer system and not serviced by on-site septic systems. This Master Plan considers the future impacts of existing private septic system connections to the sanitary sewer system, due to failing septic systems in the future. The County of San Diego Department of Environmental Health Code Section 68.312 states that any new building construction or reconstruction where the building is located within 200 feet of an existi ng public sewer shall connect to a public sewer. With this code in mind and recognizing the high costs for small rural developments to extend lengthy sewers, the study area is divided into four service areas with a 1,000-foot distance set as a boundary for a reasonable Potential Service Area, to be conservative. For purposes of evaluating the conveyance capacity of the existing sewer system, it is assumed that the Potential Service Area will be connected by 2030 and that the Rural Service Area will be connected by 2050, which for the purposes of this Master Plan is considered the buildout horizon. The hydraulic analysis for this Master Plan will consider growth through year 2030. Table 2-2 summarizes the four service area sizes and Figure 2-2 presents a distribution of parcels by acreage chart. The study area is evaluated as five service areas, as shown on Figure 2-3: Existing Service Area is comprised of the western half of Poway and consists of currently permitted parcels. The majority of the Existing Service Area is made up of parcels less than an acre in size. San Diego Service Area is comprised of the portions of the City of San Diego that drain into Poway’s sanitary sewer system and mainly consist of parcels less than one acre in size or between one and five acres. Potential Service Area is comprised of parcels, either vacant or utilizing an on-site septic system, within or surrounding the existing sanitary sewer system within a distance of 1,000 feet, that have a higher probability of connecting, future development, or existing developments which may experience a septic system failure and connect to the existing sewer system. This service area is assumed to be completely connected to the existing sewer system by 2030. Rural Service Area is comprised of parcels, either vacant or utilizing an on-site septic system, which are more than 1,000 feet from the existing sewer system and extend to the study area boundary. These parcels have a low probability of connecting to the sewer system given the high costs of sewer system extension. This service area is assumed to be completely connected to the existing sewer system by 2050, which is the assumed buildout horizon. Buildout flow estimates and assumed growth from the Rural Service Area are considered in this Master Plan for informative purposes only and to provide a conservative view of growth within the Poway area. Parks and Open Space comprise 27 percent of the acreage within the Master Plan study area. These areas are considered to remain undeveloped and unconnected to the sanitary sewer system. Wastewater flows from parks and open space areas are Study Area 2-4 City of Poway Sanitary Sewer Master Plan February 2013 assumed to be accounted for as part of the overall service area flows and are not evaluated at a parcel level for the purposes of evaluating the sewer system capacity. Table 2-2 Service Area Area Acres Percentage of System Existing Poway 7,753 27.6% City of San Diego 1,438 5.1% Poway Potential 4,126 14.7% Poway Rural 5,414 19.3% County Rural 1,693 6.0% Parks/Open Space 7,673 27.3% Study Area Total 28,097 100% Figure 2-2 Distribution of Parcels Note: Number of “Existing Poway” parcels less than 1 acre totals 10,155 parcels; chart axis adjusted to better view remaining categories. 0 1,000 2,000 3,000 4,000 5,000 < 1 ac 1-5 ac 5-20 ac > 20 ac No. of Parcels Parcel Acreage Existing Poway City of San Diego Poway Potential Poway Rural County Rural Open Space 10,000 4,000 3,000 2,000 1,000 0 !!!! ! !!!!!!!!!! !! !! !!!! ! !!! !! !!!!!! !! !!!!!! !!!! !! !!!!!! !!!!!!!! !! !! !!!!!!!!!!!!!!!!!!!!! ! ! !!!!!!! ! ! ! !!!!!!!!!!!!!!!!!!!!!!!!!! ! ! !! !! !! !!!!!!!!!!!!!! !! !!!!!!!!!!!!!!!!!!! !!!! ! !! ! ! ! ! ! ! !! !! !! !!!! !! !! !!!!!!!!!!!!!!!!!!!!!! !! !!!!!! !! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!! !! !! !!!! !! !!!! ! !!!!!!!!!! !!!!!!! ! ! ! ! ! !! !! !!!!!!!!!!!!!!!!!!!!!!!!!!! ! !! ! ! !!! ! !!!!! Miramar Reservoir Lake Hodges Lake Poway Santa Maria Creek L o s P e n a s q u i t o s Santa Ysabel Creek S y c a mo r e C r e k C a n y o n Beeler Canyon C re e k CreekPomerado RdPoway Rd Highland Valley Rd Espola RdW Bernardo DrScripps Poway Pkwy Twin Peaks Rd Ca mino D el N orte Community RdTedGarden Rd Archi e Moore RdPoway Rd !"a$ ?z William s P k w y P o w a y R d Highland Valley Rd 2/5/2013 LH SD Z:\Projects\IS\Poway\SewerMasterPlan\mxd\21812_PSMP_ServiceArea_F2-3.mxd Service Areas Figure 2-3 ¯ 7,000 Feet Sanitary Sewer Master Plan February 2013 City of Poway Study Area Existing Poway Service Area San Diego Service Area Potential Service Area Rural Service Area Dedicated Open Space Study Area 2-6 City of Poway Sanitary Sewer Master Plan February 2013 2.3 Land Uses To document land use and population projections within the study areas, the San Diego Association of Governments (SANDAG) 2050 Regional Growth Forecast was utilized. The primary function of the SANDAG land use model is to produce mid-range and long-range demographic and economic forecasts for the San Diego region. Essential model inputs include assumptions about birth and death trends, international and domestic migration, and national economic and demographic forecasts, as well as forecasts for the California population and economy. These forecasts act as independent driving variables in the model, supplying the overall trend and direction that the local demographics and economy are likely to follow. The current forecast (Series 12 – 2050 San Diego Regional Growth Forecast Update) was adopted by SANDAG’s Board of Directors on February 26, 2010 and is the twelfth forecast completed since SANDAG began forecasting in the late 1970s. The land uses within the study area were categorized into eight categories; single-family residential, multi-family residential, commercial, industrial, institutional, parks and open space, undeveloped land, and agricultural. SANDAG Series 12 existing land use coverage was used as the existing land use and SANDAG planned land use coverage, along with Poway’s Zoning data, was used for the planned land uses, shown on Figure 2-4 and Figure 2-5, respectively. The land use coverages were overlaid with parcels from the SANGIS parcel database (January 2009). Parcels were attributed with a Master Plan land use category based on the location of the parcel centroid and the SANDAG land use overlay. Poway’s current Zoning was then compared to the SANDAG planned land use overlay to identify and correct any errors in the SANDAG data. Table 2-3 and Table 2-4 summarize existing and planned dwelling unit (DU) counts for residential parcels and acreage for nonresidential parcels for the service areas. The following describes the anticipated growth in each service area. The Existing Service Area is anticipated to change slightly as some agriculture land uses transition to non-residential uses. Vacant land within this service area was included in the Potential Service Area. The San Diego Service Area is anticipated to add approximately 220 dwelling units with the non-residential uses not changing significantly. The Potential Service Area has the most potential for growth because it include s vacant land surrounding the existing sewer system. This service area is anticipated to see growth of an estimated 200 new dwelling units. This service area also contains approximately 1,000 existing dwelling units currently being served with on -site septic systems that could be converted to the existing sewer system. For the purposes of this Master Plan the 2030 planning horizon will include this service area. The Rural Service Area is anticipated to add approximately 700 dwelling units at very low densities. It is unlikely that these areas will require sewer service unless the dwelling units are located in closer proximity to the existing sewer system. This Master Plan includes this service area in the 2050 planning horizon. Study Area 2-7 City of Poway Sanitary Sewer Master Plan February 2013 Table 2-3 Existing Land Use Land Use Category Existing Service Area San Diego Service Area Potential Service Area Rural Service Area Study Area Total Single Family Residential 5,530 Ac 852 Ac 1,368 Ac 2,115 Ac 9,864 Ac Single Family Residential 11,739 DU 4,560 DU 1,033 DU 311 DU 17,643 DU Multifamily Residential 238 Ac 117 Ac 0 Ac 0 Ac 354 Ac Multifamily Residential 3,397 DU 1,248 DU 0 DU 0 DU 4,645 DU Agricultural 377 Ac 0 Ac 25 Ac 453 Ac 855 Ac Commercial 383 Ac 45 Ac 0 Ac 0 Ac 427 Ac Hospital 30 Ac 0 Ac 0 Ac 0 Ac 30 Ac Industrial 759 Ac 74 Ac 0 Ac 0 Ac 833 Ac Institutional 422 Ac 109 Ac 0 Ac 2 Ac 533 Ac Park/Open Space 2,861 Ac 982 Ac 503 Ac 3,432 Ac 7,778 Ac Vacant 25 Ac 241 Ac 2,672 Ac 4,537 Ac 7,475 Ac Total Area 10,623 Ac 2,420 Ac 4,569 Ac 10,538 Ac 28,149 Ac Total Dwelling Units 15,136 DU 5,808 DU 1,033 DU 311 DU 22,288 DU Ac = Acres DU = dwelling units Table 2-4 Planned Land Use Land Use Category Existing Service Area San Diego Service Area Potential Service Area Rural Service Area Study Area Total Single Family Residential 5,904 Ac 1,023 Ac 3,620 Ac 7,140 Ac 17,687 Ac Single Family Residential 11,742 DU 4,782 DU 1,215 DU 336 DU 18,075 DU Multifamily Residential 238 Ac 117 Ac 2 Ac 0 Ac 356 Ac Multifamily Residential 3,397 DU 1,248 DU 0 DU 0 DU 4,645 DU Agricultural 6 Ac 0 Ac 0 Ac 0 Ac 6 Ac Commercial 390 Ac 45 Ac 22 Ac 0 Ac 457 Ac Hospital 30 Ac 0 Ac 0 Ac 0 Ac 30 Ac Industrial 757 Ac 74 Ac 312 Ac 0 Ac 1,143 Ac Institutional 419 Ac 127 Ac 31 Ac 6 Ac 583 Ac Park/Open Space 2,856 Ac 1,001 Ac 463 Ac 3,376 Ac 7,695 Ac Vacant 24 Ac 33 Ac 118 Ac 16 Ac 191 Ac Total 10,623 Ac 2,420 Ac 4,569 Ac 10,538 Ac 28,149 Ac Total Dwelling Units 15,139 DU 6,030 DU 1,215 DU 336 DU 22,720 DU Ac = Acres DU = dwelling units The existing service area is predominantly built out with only minor anticipated growth of approximately 200 dwelling units in total. Extending service to the Potential Service Area would add another 180 dwelling units. The following describes the anticipated growth in each service area. S Miramar Reservoir Lake Hodges Lake Poway City of San Diego Escondido Poway County of San Diego Santa Maria Creek L o s P e n a s q u i t o s Santa Ysabel Creek S y c a mo r e Cr e e k Creek Beeler Canyon C re e k C a n y o nPomerado RdPoway Rd Highland Valley Rd Espola RdW Bernardo DrScripps Poway Pkwy Twin Peaks Rd Ca mino Del Norte Community RdT e d Garden Rd Archi e Moore RdPoway Rd !"a$ ?zWilliamsPkwyPoway R d H i g h l a n d Va l l e y R d 2/5/2013 LH SD Z:\Projects\IS\Poway\SewerMasterPlan\mxd\21812_PSMP_ExistingLandUSE_F2-4.mxd Existing Land Use Figure 2-4 ¯ 7,000 Feet Study Area City Boundary Land Use Vacant Single Family Residential Multi-Family Residential Commercial Institutional Industrial Agriculture Park/Open Space Sanitary Sewer Master Plan February 2013 City of Poway !!!!!!!!!!!!!!!!! !! !! !!!! ! !!! !! !!!!!! !! !!!! !! !!!! !! !!!!!! !!!!!!!! !! !! !!!!!!!!!!!!!!!!!!!!!!!!!! ! ! !!!!!!! ! ! ! !!!!!!!!!!!!!!!!!!!! !!!!!! ! ! !! !! !! !!!!!!!!!!!!!! !! !!!!!!!!!!!!!!!!!!! !!!! ! !! ! ! !!! ! !! !! !! !!!! !! !! !!!!!!!!!!!!!!!!!!!!!! !! !!!!!! !! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !! !!!! !! !! !!!! !!!!!! ! ! !!!!!!!!!!!!! ! ! ! ! ! ! ! ! !!!!!! ! ! ! ! ! !!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!! !! ! ! ! ! ! !!! S Miramar Reservoir Lake Hodges Lake Poway City of San Diego Escondido Poway County of San Diego Santa Maria Creek L o s P e n a s q u it o s C a n y o n Santa Ysabel Creek C re e k Beeler Canyon C re e k Sycamore Creek Pomerado RdPoway Rd Highland Valley Rd Espola RdW Bernardo DrScripps Poway Pkwy Twin Peaks Rd Ca mino Del Norte Community RdTedGarden Rd Archi e Moore RdPoway Rd !"a$ ?z Willia m s P k w y P o w a y R d H i g h l a n d Va l l e y R d 2/5/2013 LH SD Z:\Projects\IS\Poway\SewerMasterPlan\mxd\21812_PSMP_PLANNED_LandUSE_F2-4.mxd Planned Land Use Figure 2-5 ¯ 7,000 Feet Study Area City Boundary Land Use Vacant Single Family Residential Multi-Family Residential Commercial Institutional Hospital Industrial Agricultural Park/Open Space Sanitary Sewer Master Plan February 2013 City of Poway Study Area 2-10 City of Poway Sanitary Sewer Master Plan February 2013 2.4 Existing and Forecasted Populations Residential and employment populations were estimated for the existing 2010 condition and the future 2030 and 2050 horizon conditions. Populations within the study area were provided by SANDAG at the model basin level for years 2010, 2030 and 2050 based on the Series 12 data and adjusted based on recent 2010 census data for the City of Poway. The 2030 horizon assumes that populations within the Potential Service Area will be connected to the existing system. The 2050 buildout horizon assumes that the sanitary sewer system will have been extended to serve the Rural Service Area. Table 2-5 summarizes the residential and employment population estimates for the existing and future horizon scenarios. Table 2-5 Existing and Forecasted Populations Planning Scenario Service Areas Included Populations Residential Employment Existing Existing + San Diego 65,949 34,997 2030 Horizon Maximum Growth Existing + San Diego + Potential 74,463 39,016 2050 Buildout Horizon Without Rural Existing + San Diego + Potential 76,634 45,423 With Rural Existing + San Diego + Potential + Rural 80,569 46,182 Based on SANDAG’s forecasted projections, populations within the study area are expected to grow by 15 percent by 2030 and 30 percent through 2050. This Master Plan will utilize the Existing planning scenario to evaluate Poway’s existing infrastructure and the 2030 Horizon planning scenario to assess potential infrastructure deficiencies in the sanitary sewer system. The 2050 Buildout Horizon will be used to assess planned infrastructure needs and develop recommended capital improvement projects. 2.5 Existing Sanitary Sewer System Poway’s existing sanitary sewer system consists of approximately 4,000 manholes, 18 5 miles of gravity mains, five (5) lift stations and force mains and the Oak Knoll Siphon, which has three barrels. Figure 2-6 depicts Poway’s sanitary sewer system along with the contributing City of San Diego sewer mains. Figures 2-7, and 2-8 depict the existing gravity system by age and material, respectively, and a summary of this breakdown is provided in Appendix A. In general, Poway includes predominantly 8-inch diameter pipelines constructed of either vitrified clay pipe (VCP) generally before the 1990s or poly vinyl chloride (PVC) pipe in the 1990s to current. Tables 2-6 and 2-7 summarize Poway’s existing lift stations, force mains and siphon, respectively. Study Area 2-11 City of Poway Sanitary Sewer Master Plan February 2013 Table 2-6 Lift Stations Lift Station Date Installed/ Upgraded No. Pumps Design Discharge (gpm) Design TDH (feet) Hp RPM Emergency Storage (gallons) Backup Power Old Coach (LS-1) 1999 2 215 248 75 1,750 1,571 Generator St Andrews (LS-2) 1975/2011 3 100 105 15 1,250 7,898 Portable Camino del Valle (LS-3) 1979/2007 3 565 165 60 1,750 4,308 Generator Highlands Ranch (LS-4) 1988/2010 2 150 156 30 1,750 804 Portable Heritage (LS-5) 2003 2 290 127 25 1,750 1,429 Portable gpm = gallons per minute Table 2-7 Force Mains Force Main Diameter (inches) Material Length (feet) Old Coach Force Main 6 PVC 6,171 St Andrews Force Main 4 PVC 1,925 Camino del Valle Force Main 12 PVC 6,442 Highlands Ranch Force Main 4 PVC 1,363 Heritage Force Main 6 PVC 1,263 Oak Knoll Road Siphon 8 15 18 VCP VCP PVC 677 677 768 2.6 Regional Sewerage Facilities Poway conveys sewer flows generated in its service area as well as sewer flows generated in portions of the City of San Diego into the City of San Diego’s Municipal Wastewater System (Muni) for conveyance to either the City of Escondido’s Hale Avenue Resource Recovery Facility (HARRF) or to the City of San Diego Metropolitan Wastewater District’s System (Metro). Sewer flows are conveyed within the Metro System for disposal at either the North City Water Reclamation Plant (NCWRP) and/or the Point Loma Wastewater Treatment Plant (PLWTP). The majority of sewage generated within the study area flows southwesterly along Poway Road and discharges into the City of San Diego’s Penasquitos Trunk Sewer, where flows are ultimately conveyed to the Metro System. Poway’s current contracted conveyance capacity within the Metro System is 5.05 million gallons per day (mgd). Conveyance capacity provides Poway with a contracted flow capacity to transport wastewater within the Metro trunk sewer system and is contracted separately from treatment capacity within Metro treatment facilities. Sewage generated in the Pomerado and Old Winery basins (approximately 1 percent of total Poway flows) are conveyed north westerly into Muni’s East Bernardo Trunk Sewer and are ultimately conveyed to HARRF. Poway has 5.894 mgd of contracted treatment capacity within the Metro system, including 0.05 mgd of treatment capacity at HARRF. Regional sewerage facilities are shown in Figure 2-9. !!!!!!!!!!!!!!!!! !! !! !!!! ! !!!!! !!!!!! !! !!!! !! !!!! !! !!!!!! !!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! !!!!!!! ! ! !!!!!!!!!!!!!!!!!!!!! !!!!!! ! ! !! !! !! !!!!!!!!!!!!!! !! !!!!!!!! !!!!!!!!!!! !!!! ! !! ! ! ! ! ! ! !! !! !! !!!! !! !! !!!!!!!!!!!!!!!!!!!!!! !! !!!!!! !! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!! !! !! !!!! ! !!!!! ! ! !!!!!!!!!!!!! ! ! ! ! ! ! !!!!!!!! ! ! ! ! ! !! !! !!!!!!!!!!!!!!!!!!!!!!!!!!! ! !! ! ! ! ! ! ! ! ! S Miramar Reservoir Lake Hodges Lake Poway City of San Diego Escondido Poway County of San Diego Santa Maria Creek L o s P e n a s q u i t o s C a n y o n Santa Ysabel Creek C re e k Beeler Canyon C re e k Sycamore Creek Pomerado RdPoway Rd Highland Valley Rd Espola RdW Bernardo DrScripps Poway Pkwy Twin Peaks Rd Ca mino D el N orte Community RdTedGarden Rd Archi e Moore RdPoway Rd !"a$ ?z W il lia m s P k w y P o w a y R d H i g h l a n d V a l l e y R d FS-2 LS-4 LS-2 LS-5 LS-1 LS-3 PO3 PO5 PO6 PO1 PO4 PO2 2/5/2013 LH SD Z:\Projects\IS\Poway\SewerMasterPlan\mxd\21812_PSMP_ExSewSyst_F2-6.mxd Existing Sewer System Figure 2-6 ¯ 7,000 Feet Sanitary Sewer Master Plan February 2013 City of Poway Study Area City of Poway Gravity Main < 10" Siphon Gravity Main > 12" ForceMain City of San Diego Pipe Meter Station Lift Station !!!!!!!!!!!!!!!!! !! !! !!!! ! !!!!! !!!!!! !! !!!! !! !!!! !! !!!!!! !!!!!!!! !! !!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! !!!!!!! ! ! !!!!!!!!!!!!!!!!!!!!! !!!!!! ! ! !! !! !! !!!!!!!!!!!!!! !! !!!!!!!! !!!!!!!!!!! !!!! ! !! ! ! ! ! ! ! !! !! !! !!!! !! !! !!!!!!!!!!!!!!!!!!!!!! !! !!!!!! !! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!! !! !! !!!! ! !!!!! ! ! !!!!!!!!!!!!!!!!!! ! ! ! ! ! ! !!!!!!!! ! ! ! ! ! !! !! !!!!!!!!!!!!!!!!!!!!!!!!!!! ! !! ! ! Miramar Reservoir Lake Hodges Lake Poway City of San Diego Escondido Poway County of San Diego Santa Maria Creek L o s P e n a s q u i t o s C a n y o n Santa Ysabel Creek C re e k Beeler Canyon C re e k Sycamore Creek Pomerado RdPoway Rd Highland Valley Rd Espola RdW Bernardo DrScripps Poway Pkwy Twin Peaks Rd Ca mino D el N orte Community RdTedGarden Rd Archi e Moore RdPoway Rd !"a$ ?z Wi lli am s P k w y P o w a y R d H i g h l a n d V a l l e y R d 2/5/2013 LH SD Z:\Projects\IS\Poway\SewerMasterPlan\mxd\21812_PSMP_Ex_Gravity_AGE_F2-7.mxd Existing Gravity Mains Pipeline Age Figure 2-7 ¯ 7,000 Feet Study Area Sewer Main - Year Installed 1920 to 1969 1970 to 1989 1990 to 2010 City of Poway Sanitary Sewer Master Plan February 2013 City of Poway !!!!!!!!!!!!!!!!! !! !! !!!! ! !!!!! !!!!!! !! !!!! !! !!!! !! !!!!!! !!!!!!!! !! !!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! !!!!!!! ! ! !!!!!!!!!!!!!!!!!!!!! !!!!!! ! ! !! !! !! !!!!!!!!!!!!!! !! !!!!!!!! !!!!!!!!!!! !!!! ! !! ! ! ! ! ! ! !! !! !! !!!! !! !! !!!!!!!!!!!!!!!!!!!!!! !! !!!!!! !! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!! !! !! !!!! ! !!!!! ! ! !!!!!!!!!!!!!!!!!! ! ! ! ! ! ! !!!!!!!! ! ! ! ! ! !! !! !!!!!!!!!!!!!!!!!!!!!!!!!!! ! !! ! !AKE ODGES Miramar Reservoir Lake Hodges Lake Poway City of San Diego Escondido Poway County of San Diego Santa Maria Creek L o s P e n a s q u i t o s C a n y o n Santa Ysabel Creek C re e k Beeler Canyon C re e k Sycamore Creek Pomerado RdPoway Rd Highland Valley Rd Espola RdW Bernardo DrScripps Poway Pkwy Twin Peaks Rd Ca mino D el N orte Community RdTedGarden Rd Archi e Moore RdPoway Rd !"a$ ?z Wi lli am s PkwyP o w a y R d H i g h l a n d V a l l e y R d 2/5/2013 LH SD Z:\Projects\IS\Poway\SewerMasterPlan\mxd\21812_PSMP_Ex_gravity_MATERIAL_F2-8.mxd Existing Gravity Mains Pipeline Material Figure 2-8 ¯ 7,000 Feet Study Area City of Poway PVC VCP DIP Sanitary Sewer Master Plan February 2013 City of Poway [Ú +C [Ú +C [Ú +C [Ú [Ú San Vic Reser LAKE MURRAY SANTEE LAKES Miramar Reservoir Lake Hodges Lake Poway County ofSan DiegoCounty ofSan Diego PS 64 North City WRP Penasquitos PS Penasquitos Trunk Sewer PenasquitosRelief Sewer PS 64Force MainRose Canyon& Miramar RoadTrunk Sewers North MetroInterceptor Force Main Outfall Point Loma WWTP Force Main PS #2 Rose Canyon &Rose Canyon ParallelTrunk Sewers East Mission Bay Trunk Sewer &Morena BoulevardInterceptor HARRF East BernardoTrunk Sewer PS 77B PS 77A ?ä #"^ #"s ?ù #"^ ?h ?t SAN DIEGO POWAY SANTEE ENCINITAS EL CAJON CARLSBAD LA MESA ESCONDIDO CORONADO NATIONAL CITY CHULA VISTA SAN MARCOS LEMON GROVE SOLANA BEACH DEL MAR 2/5/2013 LH SD Z:\Projects\IS\Poway\SewerMasterPlan\mxd\21812_PSMP_RegionalSewerMap_F2-9.mxd Sanitary Sewer Master Plan February 2013 NOTE: Pipelines shown schematically for graphic purposes only. Regional Sewerage Facilities Figure 2-9 ¯ 4 Miles City of Poway Study Area 2-16 City of Poway Sanitary Sewer Master Plan February 2013 This page intentionally left blank. 3-1 City of Poway Sanitary Sewer Master Plan February 2013 Chapter 3 Wastewater Generation Analysis This chapter provides a description of the wastewater generation including: Existing flow meter data summary; Methodology for developing unit generation rates; Recommended unit generation rates; Estimated future wastewater flows; and Metro capacity needs. 3.1 Flow Meters As described in Section 2.6, most of Poway's sewer flows are conveyed within the City of San Diego Metro System for disposal at either the NCWRP and/or the PLWTP. Poway’s current contracted conveyance capacity within the Metro System is 5.05 million gallons per day (mgd). Sewage generated in the Pomerado and Old Winery basins are conveyed north westerly into Muni’s East Bernardo Trunk Sewer and are ultimately conveyed to HARRF. Poway has 5.894 mgd of contracted treatment capacity within the Metro system, including 0.05 mgd of treatment capacity at HARRF. The existing sanitary sewer system has one permanent flow meter located at the downstream end of the Poway system (Meter PO-2) and five permanent flow meters where City of San Diego flows are metered into the Poway sanitary sewer system. The permanent meters are maintained by the City of San Diego through their contractor ADS Environmental Services (ADS). To help characterize wastewater flows throughout the system, five temporary flow meters were placed strategically throughout Poway’s sanitary sewer system to monitor flows from internal Poway areas. ADS monitored these locations for a 14-day period, from November 11 through November 24, 2011. Table 3-1 summarizes the average daily metered flow at the permanent and the temporary meters with viable data. Figure 3-1 presents the locations of the permanent and temporary meters. The ADS flow metering report and meter data are included in Appendix B. Table 3-1 Sanitary Sewer Flows by Meter Meter Name Monitoring Period Metered Average Flow (mgd) PO1 Dec 1, 2010 - Nov 30, 2011 0.44 PO3 Dec 1, 2010 - Nov 30, 2011 0.12 PO5 Dec 1, 2010 - Nov 30, 2011 0.23 PO4 Dec 1, 2010 - Nov 30, 2011 0.15 PO6 Dec 1, 2010 - Nov 30, 2011 0.19 Meter C Nov 11, 2011 - Nov 24, 2011 0.14 Meter D Nov 11, 2011 - Nov 24, 2011 0.36 Meter E Nov 11, 2011 - Nov 24, 2011 0.26 Meter B Nov 11, 2011 - Nov 24, 2011 1.41 Meter A Nov 11, 2011 - Nov 24, 2011 0.06 PO2 Dec 1, 2010 - Nov 30, 2011 4.60 mgd = million gallons per day #* #* #* #* #* #* Temp D Temp E Temp C Temp A Temp B PO3 PO5 PO6 PO1 PO4 PO2 B D D C PO2 E PO1 HARRF PO6 PO3 A PO5 PO4 Unmetered StoneCanyon HARRF 2/5/2013 LH SD Z:\Projects\IS\Poway\mxd\21812_PSMP_FlowMonitorLoc_F3-1.mxd Sanitary Sewer Master Plan February 2013 Municipal Boundary Gravity Sewer Forcemain #*Permanent Meter Temporary Meter City of Poway Flow Meter Locations Figure 3-1 ¯ 6,000 Feet Wastewater Generation Analysis 3-3 City of Poway Sanitary Sewer Master Plan February 2013 3.1.1 Metered Sewer Basins Meter basins were delineated for all of the installed temporary and permanent flow meters and encompass all of Poway’s existing connected wastewater customers. Wastewater flows generated within each meter basin were estimated from the average flows observed at each meter. In some basins, this required the deduction of flows from upstream meters. Table 3 -2 summarizes the meter basins, the estimated average flow and a description of each basin. Figure 3-2 presents a flow schematic of the meter basins and flow meters in Poway’s sanitary sewer system. Table 3-2 Poway Metered Sewer Flows by Basin Meter Name Description Metered Average Flow (mgd) San Diego Basin PO1 San Diego West (includes La Manda area) 0.44 PO3 San Diego West 0.12 PO4 San Diego West 0.15 PO5 San Diego South 0.23 PO6 San Diego South 0.19 City Metro Basin Meter C Poway Business Park 0.14 Meter D South East Poway/ Business Park 0.36 Meter E South East Poway 0.26 Meter B Pomerado/ North Poway 1.41 Camino del Valle Camino del Valle LS (pumps to Meter B) 0.62 Meter A North Poway 0.06 PO2 Central Poway 4.60 mgd = million gallons per day Note: Flow meter data from November 11-25, 2011. The study area is comprised of three major sewer basins, shown in Figure 3-3: San Diego flows to Poway (San Diego Basin), Poway flows treated by HARRF (Poway HARRF Basin), and Poway flows to the Metro System (City Metro Basin). The San Diego Basin is monitored by three flow meters along the western portion of Poway (PO-1, PO-3, and PO-5) and two additional meters along the southern boundary of Poway (PO-4 and PO-6). The Poway HARRF Basin is not metered but includes two house count areas for estimating flow contributions, Old Winery and Pomerado. The Poway Metro Basin is monitored at meter PO-2, located on Poway Road west of Poway’s boundary prior to entering the City of San Diego’s Penasquitos Trunk Sewer. M M San Diego House Count Area Poway Agency House Count Area Permanent Meter Billing & Sampling Meter Temporary Meter San Diego Pipeline Poway Pipeline M Stone Canyon La Manda Springhurst Street M PO4 M PO1 M PO6 Pomerado Old Winery To HARRF M C M D M E M A February 2013 H:\PbWks\112Poway\100021812 Sewer Master Plan\Graphics\21812_SewerFlowSchematic_F3-2.cdr 4-06-2012 City of Poway Sanitary Sewer Master Plan Figure 3-2 M PO5 M PO3M MB M PO2To Metro Camino de Valle Lift Station LS Flow Meter Schematic #* #* #* #* #* #* Potential Future Service Area Temp D Temp E Temp C Temp A Temp B PO3 PO5 PO6 PO1 PO4 PO2 2/5/2013 LH SD Z:\Projects\IS\Poway\mxd\21812_PSMP_Major_Sewer_Basins.mxd Sanitary Sewer Master Plan February 2013 Municipal Boundary Gravity Sewer Forcemain #*Permanent Meter Temporary Meter Outside of Service Area City Metro Basin San Diego Basin City HARRF Basin City of Poway Major Sewer Basins Figure 3-3 ¯ 6,000 Feet Wastewater Generation Analysis 3-6 City of Poway Sanitary Sewer Master Plan February 2013 San Diego Basin The San Diego Basin includes areas to the west and to the south of Poway. Flows generated within this basin are metered at the point where flows enter the Poway sanitary sewer system and are conveyed through the Poway Metro Basin to the City of San Diego’s Penasquitos Trunk Sewer. The basin is predominantly residential but also includes some retail commercial areas. In addition to metered flows, there are three unmetered areas where flows are estimated by house counts. The La Manda area is located along the western boundary of Poway and flows through meter PO-1. Meter PO-1 monitors flows from the City of San Diego into the Poway sanitary sewer system but also includes Poway flows from the La Manda area. The area consists of 63 single family-residential units. The Springhurst Street area is located in the Sabre Springs area of the City of San Diego, just west of Poway’s boundary and north of Poway Road. The area flows unmetered into the Poway sanitary sewer system just upstream of meter PO-2 and consists of 72 single-family residential units. The Stone Canyon area is located along the western boundary of Poway and enters the Poway sanitary sewer system as a pumped flow from San Diego Sewer Pump Station (SPS) No. 75. The area consists of 484 single-family units, 154 multi-family residential units, and some retail commercial. Poway HARRF Basin The Poway HARRF Basin includes areas in the northern and western portion of Poway. Flows generated within this basin are conveyed to HARRF via the East Bernardo Trunk Sewer. The basin is made up of two unmetered areas that are billed by house counts. Old Winery: The Old Winery area is located in the northern portion of Poway near Old Winery Road and flows unmetered into the City of San Diego sewer system and through the San Diego East Bernardo Trunk Sewer to HARRF. The area consists of 175 single- family residential units, Chaparral Elementary School, and Bernardo Winery and is estimated at approximately 193 equivalent dwelling units (EDUs). This area also includes 8 vacant parcels. Pomerado: The Pomerado unmetered basin is located along Pomerado Road and Stone Canyon Road within Poway. The area flows to the City of San Diego sewer system and through the San Diego East Bernardo Trunk Sewer to HAARF. The area consists of 34 single-family residential units, three churches, and medical offices and is equivalent to approximately 53 EDUs. This area also includes one single-family residential unit that is not currently connected to the sanitary sewer system. Poway Metro Basin The Poway Metro Basin includes the majority of the Study Area and conveys flows generated within its basin and the San Diego Basin along Poway Road to the City of San Diego Penasquitos Trunk Sewer. The Poway Metro Basin flows are monitored by Meter PO-2. In Wastewater Generation Analysis 3-7 City of Poway Sanitary Sewer Master Plan February 2013 order to better understand wastewater flows within this basin, five temporary meters (Figure 3-2) were installed to monitor flows over a 14-day period. Meter A: Area A is located in the northern portion of Poway near Espola Road and Valle Verde Road. The area mainly consists of single-family residential units. Meter B: Area B includes the northern portion of Poway that drains into the major trunk sewers along the Pomerado Road corridor. The area also includes flows from the City of San Diego that flows through meters PO-1, PO-3, and PO-5. Area B is divided into a north and south metered basin. The Camino del Valle Lift Station (LS) serves the northern portion of the Basin and discharges into the trunk sewer in Pomerado Road. Atkins received metered flows from Poway for the Camino del Valle LS during the temporary monitoring period of November 11 through 24, 2011. Meter C: Area C is located within the Business Park area of Poway and includes flows that drain west to Pomerado Road. This area consists of all commercial and industrial development. Meter D: Area D is located in the south central portion of Poway and includes commercial and residential areas. Flows from this area generally drain north to Poway Road. Meter E: Area E is located within the central portion of Poway and includes commercial and residential areas. Flows from this area generally drain southwest to Poway Road. 3.2 Wastewater Generation Rates The purpose of establishing wastewater generation rates is to characterize the existing unit use by either population or land use and for use in forecasting wastewater flows. The existing metered flows were compared with land use data and population estimates to develop unit wastewater generation rates. Unit generation rates were estimated using two sources for comparison purposes: 1) population estimates compiled by SANDAG (Series 12), and 2) SANDAG Series 12 existing and planned land use coverage along with Poway’s Zoning data. Based on the findings of the unit generation rate analysis by land use and population, recommended unit rates will be established for use in forecasting future wastewater flows. SANDAG produces a new population forecast every three to five years based on land use input from incorporated cities within the County of San Diego. SANDAG coordinates with local agencies and cities on potential land use changes, general plan updates, and assumptions for residential and non-residential growth potential within its jurisdiction. Land use changes and demographic factors are input into SANDAG’s forecasting models to produce popul ation, housing unit, and employment data forecasts. To develop unit wastewater generation rates for each Meter Basin, the metered flows were compared with land use data and population estimates. Unit generation rates were estimated for residential dwelling units and commercial, industrial, and institutional acreages. Residential unit generation rates were determined in each basin based on the average household size (meter basin population / meter basin Single-Family Residential Dwelling Units (SFR DU)). Multi-family residential unit generation rates were assumed to be 75 percent of SFR generation rates. Per capita unit generation rates were determined through an iterative process utilizing established typical rates for residential and employment populations within San Diego County. Non- Wastewater Generation Analysis 3-8 City of Poway Sanitary Sewer Master Plan February 2013 residential generation rates were determined in each basin by iteratively a djusting the unit rate between 300 and 1,500 gallons per day per acre (gpd/ac). Commercial and industrial land uses can have a wide range of unit generation rates depending on the type of development, such as manufacturing, office, or warehouse distribution. With large potential variations in non-residential unit generation rates, non-residential (employment) population data was used from SANDAG Series 12 data as a check against the unit generation rates. For Commercial/Industrial land uses, employment populations were utilized to determine per capita rates as a check against the land use unit rates. Typically, employment per capita rates range from 10 to 50 gallons per capita per day (gpcd) depending on the type of employer (i.e. low rates for large warehousing and retail facilities and higher rates for manufacturing). For institutional land uses, student and employment populations were utilized to determine per capita rates. Student population data was gathered from Poway Unified School District School Accountability Report Cards for the school year 2009-2010. Typically student and employee per capita rates range from 10 to 30 gpcd. The unit generation rate calibration of each basin is described in the following sections and summarized in Table 3-3 and Table 3-4. A detailed summary of the calibration process is presented as Appendix C. Table 3-3 Wastewater Unit Generation Rate Calibration based on Population Basin Residential Employment Student Calculated Flow Calibration % Meter PO-1 55 gpcd 20 gpcd 15 gpcd 0.482 mgd 9.5 Meter PO-3 60 gpcd 20 gpcd N/A 0.110 mgd -8.6 Meter PO-5 60 gpcd 20 gpcd 15 gpcd 0.230 mgd 0.1 Meter PO-4 90 gpcd 20 gpcd N/A 0.147 mgd -1.7 Meter PO-6 90 gpcd 20 gpcd N/A 0.183 mgd -3.7 Meter C 60 gpcd 20 gpcd N/A 0.151 mgd 8.0 Meter D 55 gpcd 20 gpcd N/A 0.382 mgd 5.5 Meter E 60 gpcd 20 gpcd 15 gpcd 0.277 mgd 6.9 Meter B 55 gpcd 20 gpcd 15 gpcd 0.170 mgd -5.6 Camino del Valle 90 gpcd 20 gpcd N/A 0.611 mgd -4.1 Meter A 90 gpcd 20 gpcd N/A 0.043 mgd -22.4 Meter PO-2 55 gpcd 20 gpcd 15 gpcd 2.095 mgd 6.3 gpcd = gallons per capita per day mgd = million gallons per day Wastewater Generation Analysis 3-9 City of Poway Sanitary Sewer Master Plan February 2013 Table 3-4 Wastewater Unit Generation Rate Calibration based on Land Use Basin SFR MFR Commercial Industrial Institutional Calculated Flow Calibration % Meter PO-1 200 gpd/DU 150 gpd/DU 300 gpd/ac 500 gpd/ac 500 gpd/ac 0.464 mgd 5.5 Meter PO-3 180 gpd/DU N/A N/A N/A N/A 0.110 mgd -8.7 Meter PO-5 180 gpd/DU N/A 300 gpd/ac 500 gpd/ac 1,000 gpd/ac 0.228 mgd -1.0 Meter PO-4 270 gpd/DU N/A N/A N/A N/A 0.147 mgd -2.1 Meter PO-6 270 gpd/DU 205 gpd/DU N/A N/A 500 gpd/ac 0.181 mgd -4.7 Meter C N/A N/A 300 gpd/ac 300 gpd/ac N/A 0.137 mgd -2.1 Meter D 180 gpd/DU 135 gpd/DU 300 gpd/ac 500 gpd/ac 500 gpd/ac 0.335 mgd -7.4 Meter E 190 gpd/DU 145 gpd/DU 300 gpd/ac N/A 500 gpd/ac 0.266 mgd 2.5 Meter B 165 gpd/DU 125 gpd/DU 300 gpd/ac 500 gpd/ac N/A 1.649 mgd -2.6 Camino del Valle 240 gpd/DU 180 gpd/DU 500 gpd/ac N/A N/A 0.598 mgd -6.1 Meter A 285 gpd/DU N/A 500 gpd/ac N/A N/A 0.042 mgd -24.5 Meter PO-2 190 gpd/DU 145 gpd/DU 300 gpd/ac 500 gpd/ac 500 gpd/ac 1.863 mgd -4.9 gpd/ac = gallons per day per acre gpd/DU = gallons per day per dwelling unit mgd = million gallons per day Wastewater Generation Analysis 3-10 City of Poway Sanitary Sewer Master Plan February 2013 3.2.1 Generation Rates Using SANDAG Population The purpose of estimating population based unit generation rates is to establish the amount of wastewater a typical residential person and non-residential employee generate over a given day in order to assist in forecasting the amount of wastewater that th e study area can expect through 2050. Per capita unit generation rates are determined through a comparison of the existing SANDAG population data within a given meter basin against the average wastewater flows observed at that flow meter and industry standard ranges. SANDAG provided 2010 residential and employment population projections by basin for the study area based on Series 12 data. Through an iterative process, per capita generation rates for residential and employment populations were estimated. Table 3-3 summarizes the estimated unit generation rates by population through the iterative flow calibration process. Per capita unit generation rates were calibrated to within ten percent of existing flows based on industry standards, with the exception of Meter A. Flows generated within Meter A are small, so even slight differences in the calibrated flows make up a relatively large percentage when compared to metered flows. Both Poway and San Diego basins had an estimated employment per capita unit generation rate of 20 gpcd. Residential unit generation rates ranged from 55 to 90 gpcd. The range of residential unit generation rates can be attributed to large estate homes in the San Diego South area and the Camino del Valle LS Basin in the north and smaller homes along South East Poway. 3.2.2 Generation Rates Using Land Use Data The purpose of estimating land use based unit generation rates is to establish the amount of wastewater generated in a day over an acre of land by general land use types in order to assist in estimating the amount of wastewater that the study area can expect at the buildout. Land use based unit generation rates are determined through a comparison of the existing area per land use type within a given meter basin against the average wastewater flows observed at that flow meter and industry standard ranges. As shown in Figure 2-4 of the previous chapter, existing land uses include single-family residential, multi-family residential, industrial, commercial, and institutional. When the GIS land use coverage is overlaid with Poway’s permitted sewer database, it was possible to estimate the number of single-family and multi-family dwelling units and calculate industrial, commercial, and institutional acreage for the study area. Table 3-4 summarizes the calibration of sewer flows for each meter basin with estimated unit wastewater generation rates summarized by land use. Unit wastewater generation rates were “calibrated” to within ten percent of existing flows, with the exception of Meter A. SANDAG data projected an average of 3.32 persons per household for Poway and 3.16 persons per household for the areas of San Diego that drain to Poway. The household population density was between 2.8 and 3.4 persons per household for Poway and 3.0 to 3.6 persons per household for the areas of San Diego that drain to Poway based on estimated dwelling unit counts and SANDAG population. Wastewater Generation Analysis 3-11 City of Poway Sanitary Sewer Master Plan February 2013 Commercial and Industrial unit generation rates averaged 300 and 500 gpd/ac, respectively. Institutional unit generation rates ranged from 300 to 500 gpd/ac, due to varying student densities of the schools. Student densities were estimated based on parcel acreage and student enrollment population stated in each school’s Accountability Report Card. In each meter basin the single-family residential land use unit generation rate was first assigned a value equal to the calculated household density multiplied by the calibrated population unit generation rate. The multi-family residential land use unit generation rate was then set equal to 75 percent of the single-family unit generation rate, and the rates were adjusted through an iterative process to reasonably match the estimated residential wastewater generation for each area, as presented in Table 3-3. Non-residential land use unit generation rates were set equal to each other and then were adjusted through an iterative process to reasonably match the estimated employment wastewater generation for each area presented in Table 3-3. Typically, design standards for agencies in San Diego County assume wastewater flows between 200 to 400 gallons per day per dwelling unit (gpd/du) for single-family residential, with multi-family residential ranging from 60 percent to 75 percent of single -family residential, and 500 to 1,500 gpd/ac for non-residential land uses. When compared to typical design standards, the calibrated unit generation rates suggest that, overall, Poway residential customers generate lower than average wastewater flows and Poway has lower than average employment densities. 3.2.3 Recommended Unit Generation Rates For future development, it is typical to develop uniform unit generation rates. Poway has relatively uniform wastewater generation for land use and population projections based on our unit generation rate analyses. Therefore, for the existing system analysis, the calibrated unit generation rates shown above will be used. For future wastewater generation, more conservative generation rates will be used for the hydraulic capacity analysis. The wastewater generation rates used to estimate future flows are summarized in Table 3-5. Table 3-5 Recommended Unit Generation Rates Land Use / Population Recommended Unit Generation Rate Range of Existing Unit Rates Land Use Single-Family Residential 215 gpd/DU 165-285 gpd/DU Multi-Family Residential 160 gpd/DU 125-205 gpd/DU Commercial 300 gpd/ac 300-500 gpd/ac Industrial 500 gpd/ac 300-500 gpd/ac Institutional 600 gpd/ac 500-1,000 gpd/ac Population Residential 65 gpcd 55-90 gpcd Employment 20 gpcd 20 gpcd Student 15 gpcd 15-20 gpcd These recommended unit generation rates are intended to serve as a guide for estimating sewer flows from potential future development projects. Wastewater Generation Analysis 3-12 City of Poway Sanitary Sewer Master Plan February 2013 3.3 Wastewater Flow Projections Wastewater flow projections were developed through 2030 and for buildout. Flow projection s for 2030 and 2050 were estimated by applying the recommended population unit generation rates to the recommended phased populations. These projections form the basis for sewer input flows to the hydraulic model and analyses of future capacity needs in th e wastewater collection system. Table 3-6 summarizes the study area estimated future flows based on recommended phasing through 2050 and Table 3-7 summarizes the estimated buildout flow based on the land use for ultimate conditions. Table 3-6 Study Area Flow Projections through 2050 (by Population) Basin Population Estimated Wastewater Generation (mgd) 2010 2030 2050 2010 2030 2050 Poway HAARF Residential 635 688 704 0.04 0.04 0.05 Employment 229 514 537 0.00 0.01 0.01 HARRF Subtotal 0.04 0.05 0.06 Poway Metro Residential 47,347 54,337 59,900 2.84 3.53 3.89 Employment 30,833 34,357 40,263 0.62 0.69 0.81 Metro Subtotal 3.46 4.22 4.70 Poway Subtotal 3.50 4.27 4.76 San Diego Residential 17,966 19,437 19,965 1.08 1.26 1.30 Employment 3,920 4,145 5,382 0.08 0.08 0.11 San Diego Subtotal 1.16 1.34 1.41 Total 4.66 5.61 6.17 Table 3-7 Study Area Flow Projections through 2050 (by Land Use) Land Use Units/Acres Recommended Unit Generation Rate Estimated Wastewater Generation (mgd) Poway Poway Rural San Diego Poway Poway Rural San Diego Total w/ Rural Single-Family Residential 12,777 336 4,518 215 gpd/du 2.75 0.07 0.97 3.79 Multi-Family Residential 3,397 0 1,248 160 gpd/du 0.54 0.00 0.20 0.74 Commercial 382 0 45 300 gpd/ac 0.11 0.00 0.01 0.12 Industrial 757 0 74 500 gpd/ac 0.38 0.00 0.04 0.42 Institutional 417 6 127 600 gpd/ac 0.25 0.00 0.08 0.33 Total 4.03 0.07 1.30 5.40 The study area includes parcels that are currently on septic systems and are not connected to Poway’s sanitary sewer system (included in the Potential Service Area described in Chapter 2). There are also areas of rural residential land along the eastern portion of Poway’s jurisdiction Wastewater Generation Analysis 3-13 City of Poway Sanitary Sewer Master Plan February 2013 that are not yet developed and/or not connected to the sanitary sewer system (part of the Rural Service Area described in Chapter 2). When evaluating growth within Poway’s service area, a conservative approach was assumed to phase these areas into the study area. Wastewater projections through 2030 assume all existing septic systems within 1,000 feet will connect to the existing sanitary sewer system. The County of San Diego Department of Public Health code requires any septic system within 200 feet of the sanitary sewer system to connect if it experiences a service failure. The Master Plan assumptions to include septic system properties within 1,000 feet are conservative but reasonable given that there are only approximately 1,000 residential properties that meet this criteria. There currently are not any known septic problems in this area. By 2050, the Master Plan assumes that all existing septic system properties will connect to the sanitary sewer system. The growth assumptions also include the possibility that parcels within the Rural Service Area have developed at their planned land use densities and have connected to the sanitary sewer system. 3.4 Metro Capacity Sewage collected from the study area flows into the City of San Diego’s Municipal Wastewater System for conveyance to the City of Escondido’s HARRF for treatment and disposal or to the Metro System for treatment at either the North City Water Reclamation Plant and/or the Point Loma Wastewater Treatment Plant. The majority of sewage generated within the study area flows southwesterly along Poway Road and discharges into City of San Diego’s Penasquitos Trunk Sewer, where flows are ultimately conveyed to the Metro System. Sewage generated in the Pomerado and Old Wine ry basins are conveyed northwesterly into the City of San Diego’s East Bernardo Trunk Sewer and are ultimately conveyed to HARRF. Poway has 5.894 mgd of treatment capacity within the Metro system and a conveyance capacity within the Metro System of 5.05 mgd, as explained in Section 2.6. Poway also has 0.05 mgd of capacity at HARRF. Based on the future flow projections for Poway of 4.76 mgd, the existing Metro and Muni treatment and conveyance capacity rights will be sufficient to serve Poway through 2050. In conjunction with the Master Plan, a market assessment was performed on supplying recycled water to the golf courses located in the north end of Poway with the Camino del Valle Lift Station as a potential diversion point in the system to support a membrane bioreactor (MBR) treatment plant. The lift station receives approximately 0.62 mgd of average annual sewer flows and a small treatment plant could divert this flow from the sanitary sewer system for use as recycled water. Detailed discussions of the Beneficial Reuse Impact on Metro capacity are presented in the Satellite Treatment Plant Study Technical Memorandum, included as Appendix F. Wastewater Generation Analysis 3-14 City of Poway Sanitary Sewer Master Plan February 2013 3.5 Conclusions Existing average wastewater flows generated within Poway are approximately 3.5 mgd, including 0.04 mgd that flows to HARRF. Using conservative growth assumptions and SANDAG population projections, Poway total flows in 2030 are estimated to be 4.27 mgd. Assuming buildout of the entire study area, Poway’s ultimate sewer generation to be conveyed to Metro is estimated at approximately 4.70 mgd, plus 0.06 mgd conveyed to HARRF, and will likely not occur until beyond 2050. Poway has sufficient treatment and conveyance capacity in the Metro and Muni systems to accommodate their existing and projected sewer flows through 2050. 4-1 City of Poway Sanitary Sewer Master Plan February 2013 Chapter 4 Capacity Evaluation This chapter provides a description of the capacity analysis performed as part of the Master Plan, and includes: Evaluation criteria; Model selection, development and calibration; Capacity analysis; and Potential phased recommended improvements. 4.1 Background A capacity evaluation of Poway’s existing sanitary sewer system was completed to identify sewer pipelines and lift stations that may be deficient under recommended design criteria and to identify any upgrades needed to accommodate existing and projected dry and wet weather wastewater flows. Based on the capacity evaluation, phased facility improvements were identified to reduce the potential for sanitary sewer overflows as well as to allow for projected growth within the study area. 4.2 Methodology The principal tool utilized in the capacity analysis was the dynamic hydraulic computer model. The hydraulic model simulates flow conditions, such as wastewater flow depth, f low rate, and velocity, within pipes, manholes, and lift stations in Poway’s sanitary sewer system. The model selected for this study, InfoWorks CS (Innovyze, Version 8.5), belongs to a class of models referred to as dynamic wave models. These models provide a reasonable representation of hydraulic flow conditions over an extended period of time. The model was developed using the physical collection system data, existing and forecasted populations, per capita unit generation rates, diurnal patterns, and rainfall events. The model was then calibrated to flow metering records for dry and wet weather conditions. It was then utilized to evaluate the existing sanitary sewer system under existing and projected dry and wet weather flow conditions in order to identify potential recommended improvements. 4.3 Flow Monitoring Flow records from various locations within Poway’s sanitary sewer system were used to develop initial diurnal patterns and calibrate the hydraulic model. As discussed in Chapter 3, the City of San Diego maintains flow meters at six (6) locations within the collection system and five (5) temporary meters were installed for a 14-day period to evaluate flows from within the study area. These meters continuously record flow, depth and velocity. Flow monitoring data from November 11 through November 25, 2011 at all of the meters was used to develop initial diurnal patterns and calibrate the existing dry weather hydraulic model scenario. The month of December 2010 was identified as having a rainfall event between a 10-year and 25-year return storm. This storm event was used to calibrate wet weather events. Capacity Evaluation 4-2 City of Poway Sanitary Sewer Master Plan February 2013 4.4 Limitations of Hydraulic Modeling The hydraulic model was utilized as the primary planning tool for the sewer capacity analysis and provides a reasonable representation of actual flow conditions within a sanitary sewer system in response to existing and future sewage loading. The accuracy of the simulation, however, is directly related to the accuracy of the model input data, including ph ysical parameters and sewage loading projections. For example, in a case where roots had entered the sewer causing a blockage, the model would be unable to predict a resulting surcharge condition. Consequently, an understanding of the data sources is cri tical in interpreting the modeling results. 4.5 Evaluation Criteria Recommended criteria were developed to evaluate the capacity of the existing collection system under existing and projected dry and wet weather flow conditions. Poway’s previous Master Plan gravity main and force main evaluation criteria were reviewed and found to be within acceptable planning limits. Siphon and lift station evaluation criteria were developed by reviewing criteria for similar Southern California sewer agencies and the Water Agencies’ Standards (WAS) Design Guidelines (May 2006). The recommended evaluation criteria are presented in Table 4-1 and will be utilized to identify deficient facilities and size replacement infrastructure. Table 4-1 Recommended Evaluation Criteria Item Recommended Evaluation Criteria Gravity Main Criteria Minimum Pipe Diameter 8 inches Minimum Velocity 2 fps at peak flow rate Manning's Roughness Coefficient 0.013 Maximum Peak d/D Ratio for Existing Sewers 0.50 PDWF for diameter < 18-inch 0.75 PDWF for diameter > 18-inch 0.90 PWWF for all diameters Maximum Peak d/D Design Criteria For New Sewers 0.50 PWWF for diameter < 18-inch 0.75 PWWF for diameter > 18-inch Force Main Criteria Minimum Pipe Diameter 4 inches Minimum Velocity 2.5 fps Maximum Velocity 8 fps Hazen Williams 'C' Factor 130 Siphon Criteria Minimum Pipe Diameter 6 inch Minimum Number of Pipes 2 Minimum Velocity 3 fps at peak flow rate Hazen Williams 'C' Factor 120 Lift Station Criteria Minimum Number of Pumps 2 Minimum Pump Capacity Duty pumps capable of handling ultimate wet weather capacity Standby Capacity 100% of largest duty pump capacity Emergency Power Required: Permanent or Portable Standby Generator Emergency Storage Capacity 2 hour pumping volume at peak wet weather flow fps = feet per second PDWF = peak dry weather flows; PWWF = peak wet weather flows Capacity Evaluation 4-3 City of Poway Sanitary Sewer Master Plan February 2013 4.6 Model Development The model was developed with the physical collection system data, existing and forecasted populations, per capita unit generation rates, diurnal patterns, and rainfall events. Details regarding the collection system and the application of sewage loading factors and rainfall events are described below. 4.6.1 Collection System Attributes Data required to create the model includes information describing the physical sanitary sewer system, such as physical location, pipe diameters and reach lengths, manhole invert elevations, and estimated pipe roughness coefficients. Model connectivity was reviewed and verified with Poway operations staff. The physical parameters of the model, including pipe diameter, slope, and roughness coefficients were based principally on Poway’s GIS records. Where the data appeared to be inaccurate or unclear, Atkins coordinated with Poway staff to confirm data or agree on reasonable assumptions to input into the model. 4.7 Model Loading Wastewater flows are generated in the model by applying basin populations to per capita unit generation rates and time-varying hydrographs (diurnal patterns) at the basin’s identified tributary node. Populations were applied for existing, interim and ultimate conditions at the parcel level. Each parcel was assigned a corresponding tributary model node based on available lateral information and topography. Model basins were then formed by merging parcels with identical tributary nodes. The parcel’s existing, interim, and buildout residential and employment populations were summed and input into the model at the basin level. Residential and employment population estimates for the existing and buildout conditions were provided by SANDAG. Figure 4-1 presents the location of the model basins. A diurnal pattern is expressed as a varying flow rate over time and is applied to the estimated average residential and employment flows to develop model flow inputs into the collection system. It is necessary to develop multiple diurnal patterns in order to properly model communities with varying types of sewer discharge patterns. For instance residential users typically discharge the most sewage during the early morning and early evening hours, while employment users typically discharge the most sewage in the middle of the day. Initial residential diurnal patterns were developed for both Poway and areas of the City of San Diego based upon the flow metering data. The flow patterns for Poway and areas of the City of San Diego are typical of largely residential communities, which exhibit the largest peak in the morning and a smaller peak in the early evening. Employment populations represent only a small portion of the overall flows and, as such, diurnal patterns for employment populations were assumed as a typical bell curve with the peak occurring at midday, which is conservative. The shapes of the residential diurnal patterns were refined during the dry weather model calibration to better simulate the observed peaking of the sewage flows. Because Meter C monitored a basin comprised of only non-residential uses, diurnal patterns created for the model were able to match both weekend and weekday flows, allowing for a better approximation of employment diurnal patterns in the remaining metered basins. Appendix D includes model basin population projections and diurnal patterns. [Ú [Ú [Ú [Ú [Ú #* #* #* #* #* #* LS-4 LS-2 LS-5 LS-1 LS-3 PO3 PO5 PO6 PO1 PO4 PO2 2/5/2013 LH SD Z:\Projects\IS\Poway\mxd\21812_PSMP_ModelBasins_F4-1.mxd Model Basins Figure 4-1 City of Poway Sanitary Sewer Master Plan February 2013 ¯ 6,000 Feet Municipal Boundary Gravity Sewer City of San Diego Pipe Forcemain [Ú Existing Lift Station #*Permanent Meter Capacity Evaluation 4-5 City of Poway Sanitary Sewer Master Plan February 2013 4.7.1 Rainfall Events Rainfall derived inflow and infiltration (RDI&I) is the combination of wet weather infiltration and direct inflow that establishes the maximum required hydraulic capacity of the sanitary sewer system. Rainfall infiltration is water that enters the sanitary sewer system underground through holes, cracks and leaky joints in pipelines and manholes as a result of rainfall percolation and temporary rising of groundwater levels. While the amount of infiltration from rainfall events can be estimated from an evaluation of flow data and rainfall records, infiltration that occurs year- round in areas of high groundwater can typically only be detected from pipeline video inspections or manhole inspections. Rainfall inflow also refers to surface storm water that enters the collection system at manholes or from illicit connections to the sanitary sewer system, such as roof and yard drains and surface flows from parking lots. The primary characteristics of inflow are the rapid response to the onset and cessation of rainfall. The rate of inflow depends on the amount and intensity of a specific rainfall event and also previous rainfall events, which affect ground water saturation levels and the amount of surface runoff. Inflow and infiltration is discussed further in Chapter 5. A storm event occurring December 20-22, 2010 was selected for use in calibrating the wet weather model. The precipitation readings for the December storm are similar to an event between a 10-year and 25-year design storm for San Diego County, as shown in Figure 4-2. Figure 4-3 presents a comparison of the average daily flows recorded at Meter PO-2 to the average daily rainfall totals at the Poway rain gauge. The Poway rain gauge is loc ated near the intersection of Pomerado Road and Oak Knoll Road and data from this rain gauge was used for evaluating storm events within the Study Area. Rainfall events are applied to the model to identify their potential impacts on the collection system. RDI&I flows into the system are modeled by applying infiltration and routing coefficients to the rainfall event. These coefficients were refined during the wet weather model calibration to better simulate the observed peaking of the sewage flows. December 2010 was a very wet period, with approximately seven inches of rain falling in the last half of the month. Figure 4-3 illustrates the rapid increase in wastewater flows following periods of heavy rainfall attributed primarily to rainfall inflow. The December 2010 storm produced a peak increase of approximately 6.45 mgd (11.05 mgd total flow) at Meter PO-2 from a storm event that averaged over six inches of rain during its 5-day period. Meter PO-2 measures the total flow from the study area, except for sewer flows that are treated at HARRF. These results are not surprising given that Poway has indicated high groundwater levels throughout its service area. Poway experiences a relatively high rate of infiltration after storm events, as shown on Figure 4 - 3. Meter data from Meter PO-2 shows that after the December 20-22 storm event, daily flows still averaged approximately 1.1 mgd higher than the average annual sewage flow, with an estimated 40 million gallons of infiltration volume. This suggests high infiltration flows in the sanitary sewer system following a significant rain event. Poway pays $0.003 per gallon for Metro Annual I&I Treatment costs, equating to approximately $120,000 for infiltration flows following the December storm event. Capacity Evaluation 4-6 City of Poway Sanitary Sewer Master Plan February 2013 Figure 4-2 December 2010 Rainfall Intensity-Duration-Frequency Curve Figure 4-3 Meter PO-2 Wet Weather Flow Assessment 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.002.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 12/112/311/303/13/314/305/306/297/298/289/2710/2711/26Average Daily Rainfall (inches)Flow (mgd)Average Daily Flow Annual Average Flow Rainfall Dec. 2010 -Nov. 2011 average flow = 4.59 mgd Peak Day = 11.05 mgd Estimated RDI&I = 6.45 mgd Capacity Evaluation 4-7 City of Poway Sanitary Sewer Master Plan February 2013 4.8 Model Calibration The model was calibrated by refining estimated model parameters under dry and wet weather conditions so that the simulated model flow conditions reasonably approximated the measured flow conditions. Diurnal curves were adjusted for the dry weather calibration such that simulated and recorded wastewater flow and depth hydrographs matched to within a reasonable level of accuracy. Infiltration and routing coefficients were adjusted in the wet weather calibration such that simulated and recorded wastewater peak flows matched to within a reasonable level of accuracy. 4.8.1 Dry Weather Calibration The model was calibrated to dry-weather meter data recorded during the temporary monitoring period of November 11-25, 2011 at both the permanent and temporary flow meters. November 11, 2011 was chosen for calibration since no rain events were observed and flows were indicative of typical dry weather flow patterns. Peak flow calibration was based on the highest observed flow recorded in that month. Simulated flow hydrographs at each meter location were compared with recorded discharge measurements. The purpose of the comparison was to allow for refinement of estimated model parameters so that the simulated flow conditions reasonably approximated the measured flow conditions. These parameters generally include diurnal curve patterns and peak to average flow ratios (peaking factors). Results of the dry weather calibration are best presented graphically, and are shown in Figures 4-4 through 4-14. The typical range of sewer volume and peak flows for dry weather model calibration is within +/– 10 percent of field measurements for master planning purposes. Table 4-2 summarizes the results of the dry weather calibration. Table 4-2 Dry Weather Calibration Summary Meter Name Description Observed Peak Flow (mgd) Modeled Peak Flow (mgd) San Diego Basin PO1 San Diego West (includes La Manda area) 0.96 0.80 PO3 San Diego West 0.25 0.27 PO4 San Diego West 0.43 0.49 PO5 San Diego South 0.28 0.29 PO6 San Diego South 0.37 0.34 Poway Metro Basin Meter C Poway Business Park 0.13 0.14 Meter D South East Poway/ Business Park 0.48 0.55 Meter E South East Poway 0.49 0.46 Meter B Pomerado/ North Poway 2.35 2.37 Meter A North Poway 0.09 0.10 PO2 Central Poway 6.89 6.32 mgd = million gallons per day Capacity Evaluation 4-8 City of Poway Sanitary Sewer Master Plan February 2013 Figure 4-4 Dry Weather Calibration at Meter PO-1 Figure 4-5 Dry Weather Calibration at Meter PO-3 0.00 0.20 0.40 0.60 0.80 1.00 1.20 0:001:002:003:004:005:006:007:008:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00Metered Discharge (mgd)Time of Day Observed Modeled Calibration 30.1% Peak 0.7% Average 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0:001:002:003:004:005:006:007:008:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00Metered Discharge (mgd)Time of Day Observed Modeled Calibration 5.1% Peak 14.9% Average Capacity Evaluation 4-9 City of Poway Sanitary Sewer Master Plan February 2013 Figure 4-6 Dry Weather Calibration at Meter PO-5 Figure 4-7 Dry Weather Calibration at Meter PO-4 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0:001:002:003:004:005:006:007:008:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00Metered Discharge (mgd)Time of Day Observed Modeled Calibration 7.8% Peak 18.5% Average 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0:001:002:003:004:005:006:007:008:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00Metered Discharge (mgd)Time of Day Observed Modeled Calibration 4.1% Peak 0.3% Average Calibration 1.9% Peak 14% Average Capacity Evaluation 4-10 City of Poway Sanitary Sewer Master Plan February 2013 Figure 4-8 Dry Weather Calibration at Meter PO-6 Figure 4-9 Dry Weather Calibration at Meter A 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0:001:002:003:004:005:006:007:008:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00Metered Discharge (mgd)Time of Day Observed Modeled Calibration 9.7% Peak 29.1% Average 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0:001:002:003:004:005:006:007:008:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00Metered Discharge (mgd)Time of Day Observed Modeled Calibration 1.6% Peak 34.2% Average Capacity Evaluation 4-11 City of Poway Sanitary Sewer Master Plan February 2013 Figure 4-10 Dry Weather Calibration at Meter B Figure 4-11 Dry Weather Calibration at Meter C 0.00 0.50 1.00 1.50 2.00 2.50 0:001:002:003:004:005:006:007:008:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00Metered Discharge (mgd)Time of Day Observed Modeled Calibration 0.5% Peak 0.3% Average 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0:001:002:003:004:005:006:007:008:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00Metered Discharge (mgd)Time of Day Observed Modeled Calibration 6.4% Peak 8.6% Average Capacity Evaluation 4-12 City of Poway Sanitary Sewer Master Plan February 2013 Figure 4-12 Dry Weather Calibration at Meter D Figure 4-13 Dry Weather Calibration at Meter E 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0:001:002:003:004:005:006:007:008:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00Metered Discharge (mgd)Time of Day Observed Modeled Calibration 13.1% Peak 5.5% Average 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0:001:002:003:004:005:006:007:008:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00Metered Discharge (mgd)Time of Day Observed Modeled Calibration 7.4% Peak 1.3% Average Capacity Evaluation 4-13 City of Poway Sanitary Sewer Master Plan February 2013 Figure 4-14 Dry Weather Calibration at Meter PO-2 4.8.2 Wet Weather Calibration The model was calibrated to the peak wet-weather flow event that occurred on December 20- 22, 2010 at the six (6) permanent flow meters. The flow records for December 22 were selected because they represented the largest spike in flows that corresponded with the peak intensity of the storm. Simulated flow hydrographs at each meter location were compared with recorded discharge measurements. The purpose of the comparison was to allow for refinement of estimated model parameters so that the simulated flow conditions reasonably approximated the measured flow conditions. These parameters include the infiltration and routing coefficients. The infiltration coefficient determines what percentage of the rainfall enters the system. The routing coefficient determines how fast or slow the rainfall enters the system. In general, the system exhibited a slow response to the storm during the first day of the storm event, but as the storm continued, rising groundwater levels resulted in very quick response times in the system. The system’s response and wet weather calibration results are best presented graphically and are shown in Figures 4-15 through 4-20. The typical range of sewer peak flow for wet weather model calibration are within +/– 10 percent of field measurements for master planning purposes. Table 4-3 summarizes the results of the wet weather calibration. 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 0:001:002:003:004:005:006:007:008:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00Metered Discharge (mgd)Time of Day Observed Modeled Calibration 4.1% Peak 0.3% Average Calibration 4.1% Peak 0.3% Average Calibration 8.9% Peak 5.9% Average Capacity Evaluation 4-14 City of Poway Sanitary Sewer Master Plan February 2013 Figure 4-15 Wet Weather Calibration at Meter PO-1 Figure 4-16 Wet Weather Calibration at Meter PO-3 Rain O bs. ...st Dec 2010!>Dec 20-22, 2010 Rain Rainfall Depth (in) 1.540 Peak (in/hr) 0.200 A verage (in/hr) 0.021 Flow (MGD) Min 0.232 0.169 Max 1.224 1.224 V olume (US Mgal) 2.086 2.183 O bserved / Predicted Plot Produced by 21807 (3/13/2012 9:30:34 A M) Page 1 of 6 Flow Survey: >Poway>Flow Survey Group>Wet Weather!!! (3/6/2012 10:55:16 A M) Sim: >Poway>Run Group>WWF Exist_pump adjust Dec 2010!>Dec 20-22, 2010 Rain (3/9/2012 12:31:28 PM) Graph Template: >Poway>Graph Template Group>Wet Weather Dec 2010! (3/7/2012 2:19:03 PM) Rain O bs. ...st Dec 2010!>Dec 20-22, 2010 Rain Rainfall Depth (in) 1.540 Peak (in/hr) 0.200 A verage (in/hr) 0.021 Flow (MGD) Min 0.023 0.014 Max 0.301 0.309 V olume (US Mgal) 0.532 0.399 O bserved / Predicted Plot Produced by 21807 (3/13/2012 9:30:34 A M) Page 2 of 6 Flow Survey: >Poway>Flow Survey Group>Wet Weather!!! (3/6/2012 10:55:16 A M) Sim: >Poway>Run Group>WWF Exist_pump adjust Dec 2010!>Dec 20-22, 2010 Rain (3/9/2012 12:31:28 PM) Graph Template: >Poway>Graph Template Group>Wet Weather Dec 2010! (3/7/2012 2:19:03 PM) Rainfall Observed Records Model Simulation Rainfall Observed Records Model Simulation Capacity Evaluation 4-15 City of Poway Sanitary Sewer Master Plan February 2013 Figure 4-17 Wet Weather Calibration at Meter PO-5 Figure 4-18 Wet Weather Calibration at Meter PO-4 Rain O bs. ...st Dec 2010!>Dec 20-22, 2010 Rain Rainfall Depth (in) 1.540 Peak (in/hr) 0.200 A verage (in/hr) 0.021 Flow (MGD) Min 0.081 0.056 Max 1.106 1.105 V olume (US Mgal) 1.618 1.300 O bserved / Predicted Plot Produced by 21807 (3/13/2012 9:30:34 A M) Page 3 of 6 Flow Survey: >Poway>Flow Survey Group>Wet Weather!!! (3/6/2012 10:55:16 A M) Sim: >Poway>Run Group>WWF Exist_pump adjust Dec 2010!>Dec 20-22, 2010 Rain (3/9/2012 12:31:28 PM) Graph Template: >Poway>Graph Template Group>Wet Weather Dec 2010! (3/7/2012 2:19:03 PM) Rain O bs. ...st Dec 2010!>Dec 20-22, 2010 Rain Rainfall Depth (in) 1.540 Peak (in/hr) 0.200 A verage (in/hr) 0.021 Flow (MGD) Min 0.069 0.051 Max 0.330 0.343 V olume (US Mgal) 0.657 0.512 O bserved / Predicted Plot Produced by 21807 (3/13/2012 9:30:34 A M) Page 4 of 6 Flow Survey: >Poway>Flow Survey Group>Wet Weather!!! (3/6/2012 10:55:16 A M) Sim: >Poway>Run Group>WWF Exist_pump adjust Dec 2010!>Dec 20-22, 2010 Rain (3/9/2012 12:31:28 PM) Graph Template: >Poway>Graph Template Group>Wet Weather Dec 2010! (3/7/2012 2:19:03 PM) Rainfall Observed Records Model Simulation Rainfall Observed Records Model Simulation Capacity Evaluation 4-16 City of Poway Sanitary Sewer Master Plan February 2013 Figure 4-19 Wet Weather Calibration at Meter PO-6 Figure 4-20 Wet Weather Calibration at Meter PO-2 Rain O bs. ...st Dec 2010!>Dec 20-22, 2010 Rain Rainfall Depth (in) 1.540 Peak (in/hr) 0.200 A verage (in/hr) 0.021 Flow (MGD) Min 0.225 0.111 Max 1.312 1.312 V olume (US Mgal) 2.067 2.009 O bserved / Predicted Plot Produced by 21807 (3/13/2012 9:30:34 A M) Page 5 of 6 Flow Survey: >Poway>Flow Survey Group>Wet Weather!!! (3/6/2012 10:55:16 A M) Sim: >Poway>Run Group>WWF Exist_pump adjust Dec 2010!>Dec 20-22, 2010 Rain (3/9/2012 12:31:28 PM) Graph Template: >Poway>Graph Template Group>Wet Weather Dec 2010! (3/7/2012 2:19:03 PM) Rain O bs. ...st Dec 2010!>Dec 20-22, 2010 Rain Rainfall Depth (in) 1.540 Peak (in/hr) 0.200 A verage (in/hr) 0.021 Flow (MGD) Min 2.969 2.198 Max 14.908 14.856 V olume (US Mgal) 25.263 26.503 O bserved / Predicted Plot Produced by 21807 (3/13/2012 9:30:34 A M) Page 6 of 6 Flow Survey: >Poway>Flow Survey Group>Wet Weather!!! (3/6/2012 10:55:16 A M) Sim: >Poway>Run Group>WWF Exist_pump adjust Dec 2010!>Dec 20-22, 2010 Rain (3/9/2012 12:31:28 PM) Graph Template: >Poway>Graph Template Group>Wet Weather Dec 2010! (3/7/2012 2:19:03 PM) Rainfall Observed Records Model Simulation Rainfall Observed Records Model Simulation Capacity Evaluation 4-17 City of Poway Sanitary Sewer Master Plan February 2013 Table 4-3 Wet Weather Calibration Summary Meter Name Description Observed Peak Flow (mgd) Modeled Flow (mgd) PO1 San Diego West (includes La Manda area) 1.22 1.22 PO3 San Diego West 0.30 0.31 PO4 San Diego West 1.11 1.11 PO5 San Diego South 0.33 0.34 PO6 San Diego South 1.31 1.31 PO2 Central Poway 14.91 14.86 mgd = million gallons per day Based on typical master planning calibration criteria, the hydraulic model is within acceptable ranges when compared to metered flow data and observed rainfall data. The model is considered a calibrated model and can be used for future planning scenarios. 4.9 Capacity Analysis A capacity analysis of the existing collection system was performed under existing and forecasted dry and wet weather flow conditions. Model simulations were performed for the recommended 2030 wastewater generation, discussed in Chapter 3, in ord er to identify potential improvement projects. The identified improvement projects were then sized to accommodate the 2050 flow projections. Projects were evaluated under the existing wastewater flows to identify project priority and phasing. Identified improvement projects were also evaluated against operational concerns, such as lift station deficiencies, odor problems, and known high - frequency maintenance areas. These projects and operational concerns are presented in Chapter 5 to form the Capital Improvement Plan presented in Chapter 6. 4.9.1 Lift Stations and Force Mains The lift stations and force mains owned and operated by Poway were evaluated under existing and projected wastewater flows based upon the criteria listed in Table 4 -1. Table 4-4 summarizes the existing and future lift station pump capacities. Table 4-5 summarizes the existing and future lift station force main capacities. Atkins reviewed lift station SCADA data for the November 11-25, 2011 and December 20-22, 2010 periods to evaluate pump performance and determine the firm pumping capacity of each lift station. Firm capacity is considered to be the maximum pumping capacity observed from SCADA data at a lift station with one pump out of service. Most of the lift stations were found to operate within the expected system head curves; however, the Camino del Valle LS data showed that pumps were operating at nearly twice the design point flows during the storm event. System head curves were compared to pump curves for each lift station and are presented in Appendix E. Capacity Evaluation 4-18 City of Poway Sanitary Sewer Master Plan February 2013 Table 4-4 Lift Station Pumping Capacities Lift Station No. Pumps Design Discharge (As-builts) (gpm) Firm Capacity (SCADA) (gpm) Existing Dry Weather Peak Flow (gpm) Existing Wet Weather Peak Flow (gpm) 2030 Wet Weather Peak Flow (gpm) 2050 Wet Weather Peak Flow (gpm) Old Coach LS (LS-1) 2 215 170 117 369 380 380 Saint Andrews LS (LS-2) 3 100 195 53 113 115 117 Camino del Valle LS (LS-3) 3 565 1,275 554 1,465 1,530 1,530 Highlands Ranch LS (LS-4) 2 150 150 9 91 92 92 Heritage LS (LS-5) 2 290 280 21 193 194 194 gpm = gallons per minute Table 4-5 Force Main Capacities Force Main Existing Diameter (inches) Observed Discharge (SCADA) (gpm) Velocity (fps) Old Coach Force Main 6 170 1.9 Saint Andrews Force Main 4 195 5.0 Camino del Valle Force Main 12 1,275 3.6 Highlands Ranch Force Main 4 150 3.8 Heritage Force Main 6 280 3.2 gpm = gallons per minute fps = feet per second WAS Lift station evaluation criteria recommends lift stations contain emergency storage volume between one to six hours of pumping capacity during average dry weather flows based on the agency’s ability to provide adequate response time during an emergency. The Poway lift stations are not in remote locations and have adequate access during an emergency. Based on Poway’s ability to respond during a power outage, this Master Plan recommends a minimum of two hours of emergency storage at lift stations without a generator on site. Emergency storage was calculated based on dimensions and pump on/off levels provided in as -built plans and evaluated under existing, 2030, and 2050 conditions. Table 4-6 summarizes the existing and future lift station storage capacities. Table 4-6 Lift Station Storage Capacities Lift Station Emergency Storage (gal) Existing Capacity 2030 Condition 2050 Condition Emergency Power Average DWF (mgd) Storage (hours) Average DWF (mgd) Storage (hours) Average DWF (mgd) Storage (hours) Old Coach LS (LS-1) 1,571 0.02 1.7 0.04 1.0 0.06 0.7 Generator Saint Andrews LS (LS-2) 7,898 0.05 3.7 0.05 3.5 0.06 3.4 Portable Camino del Valle LS (LS-3) 4,308 0.47 0.2 0.55 0.2 0.59 0.2 Generator Highlands Ranch LS (LS-4) 804 0.01 3.6 0.01 3.1 0.01 3.0 Portable Heritage LS (LS-5) 1,429 0.002 16.4 0.004 8.6 0.004 8.1 Portable mgd = million gallons per day DWF = dry weather flow Capacity Evaluation 4-19 City of Poway Sanitary Sewer Master Plan February 2013 Old Coach Lift Station (LS-1) The Old Coach LS was constructed in 1999 and contains a 6-foot by 14-foot wet well. There are two installed pumps: one duty pump and one standby pump that operate in lead/lag based on wet well levels, which provide a firm pumping capacity of 170 gpm. In addition the lift station has an emergency generator to provide power during an outage. The Old Coach LS receives flow from the Heritage LS. Existing wet weather flows have been met with the installed pump capacity; however, Poway should consider installing a second duty pump to meet future peak wet weather flows should one pump be out of service. Poway does keep a spare duty pump on hand, which allows staff to replace a faulty pump in a timely manner. Poway has expressed concerns that the lift station does not operate properly and the system head/pump curves for the lift station show that the pump typically operates below its rated design flow. The Old Coach force main currently operates at a velocity below the 2.5 fps criteria with one pump in operation. With pump upgrades and more efficient operation, as well as a second duty pump, it is expected that the force main velocities will improve. No force main upgrades are recommended at this time. The lift station currently has approximately 1.7 hours of emergency storage under existing conditions and is expected to have less than one hour of storage under future conditions, all of which are less than the recommended minimum two hours of storage. With the emergency generator on site, installing additional storage may not be a priority at this time; however, pump upgrades and a second duty pump are considered to be priority improvements . Pump upgrades should be designed to accommodate peak flows to the Old Coach LS as well as peak p umped flows from the Heritage LS. Saint Andrews Lift Station (LS-2) The Saint Andrews LS was originally constructed in 1975 and upgraded in 2011. The lift station contains an 8-foot by 24-foot wet well and three installed pumps. The two duty pumps and one standby pump operate in lead/lag based on wet well levels providing a firm pumping capacity of 200 gpm. The lift station does not have an emergency generator on site, but can accommodate a portable generator during an outage. Existing and future wet weather flows can be met with the installed pump capacity and the lift station is found to have adequate operational capacity. The lift station currently has over three hours of emergency storage under existing and future conditions, which is more than the recommended minimum two hours of storage and considered to be adequate for operation. No upgrades are recommended for the Saint Andrews LS. Camino del Valle Lift Station (LS-3) The Camino del Valle LS originally constructed in 1979 and upgraded in 2007. The lift station contains a 6-foot by 24-foot wet well and three installed pumps. The two duty pumps and one standby pump operate in lead/lag based on wet well levels providing a firm pumping capacity of 1,275 gpm. The lift station has an emergency generator on site to provide power during an outage. Capacity Evaluation 4-20 City of Poway Sanitary Sewer Master Plan February 2013 The Camino del Valle LS wet well is designed with an overflow into the City of San Diego’s sewer system. There is high potential for overflow from the li ft station to result in a spill in the City of San Diego’s system; however, capacity impacts from the lift station’s overflow are not considered as part of this Master Plan. During the December 2010 storm event, SCADA data for the Camino del Valle LS show ed that at the peak of the storm event, all three pumps were in operation. Poway may want to consider installing an additional duty pump to meet future peak wet weather flows should one pump be out of service. The lift station currently has less than an hour of emergency storage, which is less than the recommended minimum two hours of storage. With the emergency generator on site, installing additional storage may not be a priority at this time. Highlands Ranch Lift Station (LS-4) The Highlands Ranch LS was originally constructed in 1988 and recently upgraded in 2010. The lift station contains a 6-foot diameter wet well and two installed pumps. The one duty pump and one standby pump operate in lead/lag based on wet well levels , providing a firm pumping capacity of 150 gpm. The lift station does not have an emergency generator on site, but can accommodate a portable generator during an outage. Existing and future wet weather flows can be met with the installed pump capacity and the lift station is found to have adequate operational capacity. The lift station currently has over three hours of emergency storage under existing and future conditions, which is more than the recommended minimum two hours of storage and considered to be adequate for operation. No upgrades are recommended for the Highlands Ranch LS. Heritage Lift Station (LS-5) The Heritage LS was constructed in 2003 and contains an 8-foot diameter wet well and two installed pumps. The one duty pump and one standby pump operate in lead/lag based on wet well levels, providing a firm pumping capacity of 280 gpm. The lift station does not have an emergency generator on site, but can accommodate a portable generator during an outage. Existing and future wet weather flows can be met with the installed pump capacity and the lift station is found to have adequate operational capacity. The lift station currently has over sixteen hours of emergency storage under existing and eight hours of storage under future conditions, which is more than the recommended minimum two hours of storage and considered to be adequate for operation. No upgrades are recommended for the Heritage LS. 4.9.2 Oak Knoll Siphon Siphons are typically used in gravity sewer systems to convey sewer flows around utility conflicts where such crossings cannot be attained with a gravity sewer pipe at a continuous slope. The Oak Knoll Siphon allows the sanitary sewer pipes to dip below conflicting utilities in Oak Knoll Road while conveying sewer flows from a lower ele vation (bottom of the siphon) to a Capacity Evaluation 4-21 City of Poway Sanitary Sewer Master Plan February 2013 higher elevation (siphon outlet) without the use of a pump. The elevation difference between the siphon inlet and the bottom of the siphon provides enough pressure to move sewer flows through the siphon until it reaches atmospheric pressure at the siphon outlet. The existing 8-inch, 15-inch, and 18-inch diameter siphons are located in Oak Knoll Road, between Poway Road and Pomerado Road. The older 8-inch and 15-inch siphons were constructed in 1980, while the newer 18-inch siphon was installed in 1991. Flow from the 27- inch sewer enters a vault in Oak Knoll Road, where flow is diverted through the 18 -inch siphon or the 8-inch and 15-inch siphons. The 8-inch and 15-inch siphons also receive flow directly from the 21-inch sewer in Oak Knoll Road. A manual gate can be installed to direct all the flow from the 27-inch sewer into one siphon or the other, if necessary. Table 4-7 presents the modeled existing flows in each of the siphons and their respective flow capacities. Figures 4-21 through 4-23 illustrate the siphon profile design and observed modeled flows under existing peak dry weather conditions. Table 4-7 Model Predicted Existing Flows in Siphon Siphon Capacity (mgd) Existing Dry Weather Existing Wet Weather Flow (mgd) Velocity (fps) Flow (mgd) Velocity (fps) 8-inch 1.80 0.57 2.52 0.61 2.69 15-inch 6.35 1.38 1.74 3.16 3.98 18-inch 9.14 0.47 0.41 4.36 3.82 Note: Siphon capacity based on maximum velocity of 8 fps. mgd = million gallons per day fps = feet per second Figure 4-21 8-inch Siphon under Modeled Existing Flows 263V3-002-SMV3-001-SM316XXXX000335 366XXXX000336 416XXXX000066 466XXXX000067 516XXXX000327 666 716 766XXXX000028 815XXXX000029 865XXXX000064 915XXXX000065 962U3-060-SM1158U3-052-SMV3-003-SM V3-002-SM -------------U3-060-SM U3-052-SM V3-003-SM.1 ------XXXX000327.1 -------U3-060-SM.1 Node Linkft AD418.0 442.0 420.0 422.0 424.0 426.0 428.0 430.0 432.0 434.0 436.0 438.0 440.0 ft Capacity Evaluation 4-22 City of Poway Sanitary Sewer Master Plan February 2013 Figure 4-22 15-inch Siphon under Modeled Existing Flows Figure 4-23 18-inch Siphon under Modeled Existing Flows 263V3-002-SMV3-001-SM316XXXX000236 366XXXX000283 416XXXX000141 466XXXX000140 516XXXX000138 666 716 766XXXX000027 815XXXX000030 865XXXX000024 915XXXX000025 962U3-060-SM1158U3-052-SMV3-003-SM V3-002-SM -------------U3-060-SM U3-052-SM V3-003-SM.1 ------XXXX000138.1 -------U3-060-SM.1 Node Linkft AD418.0 442.0 420.0 422.0 424.0 426.0 428.0 430.0 432.0 434.0 436.0 438.0 440.0 ft 263V3-002-SM518XXXX000147 558 598 638 678 718 1032U3-054-SM1151U3-053-SMV3-003-SM V3-002-SM XXXX000147 XXXX000363 U3-054-SM - V3-003-SM.1 V3-002-SM.1 ----------XXXX000363.1 U3-054-SM.1 Node Linkft AD416.0 442.0 418.0 420.0 422.0 424.0 426.0 428.0 430.0 432.0 434.0 436.0 438.0 440.0 ft Capacity Evaluation 4-23 City of Poway Sanitary Sewer Master Plan February 2013 Sewer pipes are designed to generate minimum cleansing velocities, typically 3 fps, for preventing deposition of sediment in inverted siphons. Under dry weather conditions, velocities in the siphons are less than 3 fps, which may not provide adequate cleansing velocities in the pipe. However, the 15-inch and 18-inch siphons meet the 3 fps velocity criteria under wet weather conditions. The 8-inch siphon shows velocities less than 3 fps under wet weather conditions, which may not provide adequate cleansing velocities. Based on a recommended maximum velocity of 8 fps in the siphons, the 8-inch and 15-inch siphons have the capacity to convey sewer flows should the 18 -inch siphon be out of service under wet weather conditions. All three siphons have adequate capacity under dry weather conditions. 4.9.3 Gravity Pipelines The gravity pipelines were evaluated under existing and projected wastewater flows based upon the criteria listed in Table 4-1. Under dry weather flow conditions pipeline capacity projects were identified if the peak flows exceeded a flow depth to pipe diameter (d/D) ratio of 0.50 for pipeline diameters less than 18 inches in diameter and 0.75 for pipelines 18 inches in diameter and greater. Under wet weather flow conditions pipeline capacity projects were identified if the peak flows exceeded a d/D ratio of 0.90 for all pipeline diameters. Capital improvement projects (CIP) will be evaluated through an iterative process from downstream to upstream and it is likely that the CIP will be less extensive than the identified deficient pipelines presented in Table 4-8 once hydraulic bottlenecks are relieved. Pipelines with identified deficiencies were prioritized by model condition. Table 4-8 summarizes the total length of the identified deficiencies in gravity pipeline capacity based on model condition. Priority 1: pipelines with deficiencies triggered by existing dry weather conditions. Priority 2: pipelines with deficiencies triggered by existing wet weather conditions. Priority 3: pipelines with deficiencies triggered by 2030 dry weather conditions. Priority 4: pipelines with deficiencies triggered by 2030 wet weather conditions. Table 4-8 Gravity Pipeline Identified Deficiencies by Model Condition Diameter DWF d/D WWF d/D Length Deficient (feet) Priority 1 Priority 2 Priority 3 Priority 4 8 > 0.50 > 0.90 7,741 9,901 352 0 10 > 0.50 > 0.90 1,981 1,594 0 0 12 > 0.50 > 0.90 2,765 1,519 0 23 15 > 0.50 > 0.90 747 1,295 459 678 18 > 0.75 > 0.90 0 1,805 0 0 21 > 0.75 > 0.90 0 3,388 0 0 27 > 0.75 > 0.90 0 0 0 332 30 > 0.75 > 0.90 0 34 0 0 Totals 13,234 19,536 811 1,033 Note: The lengths presented will be refined during CIP analysis. d/D = depth to pipe diameter DWF = dry weather flow WWF = wet weather flow Capacity Evaluation 4-24 City of Poway Sanitary Sewer Master Plan February 2013 In summary, the capacity evaluation concluded that Poway has a significant quantity of capacity-constrained sewers based on the evaluation criteria, especially under existing wet weather flow conditions. Figure 4-24 presents the location of the identified pipeline deficiencies. Identified capacity deficiencies were also evaluated in conjunction with identified condition related projects (presented in Chapter 5) to form the Capital Improvement Plan presented in Chapter 6. Prior to construction of improvements, it is recommended that Poway conduct detailed engineering investigations of the identified reaches that may include field inspections, flow metering during peak flow periods (such as holidays) and under wet weather conditions, and video inspection to accurately assess the improvements needed. !!!! !! !! !! !!!!!! !!!!! ! !!! ! !! !!!!!!!!!! !! !!!! !! !! !! !!!! ! !!! !!!! !!!! !!!!!!!!!!!!!! !! !! !!!!!!!!!!!!!!!!! ! !!!!!!!!!!!!! ! ! !!!!!!!!!!!!!!!!! !!! ! !!!!!!!! !! !!!! ! !!!!! !! ! ! !!!!!!!!!!!!!!!!!! !!!! !!!!!!!! !! !! !!!!!!!!!!!!! ! ! !! !! !!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!! !!!! !!!!!!!! !!!!!! ! !!!!! !! !! ! ! !!! !!! ! !!!!!!!!!!!! !!Lake Hodges Lake Poway Poway L o s P e n a s q u i t o s C a n y o n C re e k Sycamore Creek Pomerado RdPoway Rd Highland Valley Rd Espola RdW Bernardo DrScripps Poway Pkwy Twin Peaks Rd C a mino D el N orte Community RdTedGarden Rd way Rd !"a$ Wi lli a m s PkwyP o w a y R d LS-4 LS-2 LS-5 LS-1 LS-3 2/5/2013 LH SD Z:\Projects\IS\Poway\SewerMasterPlan\mxd\21812_PSMP_Id_Deficiencies_F4-24.mxd Gravity Pipeline Identified Deficiencies Figure 4-24 Study Area City of Poway Identified Deficiencies No Deficiency Priority 1 Priority 2 Priority 3 Priority 4 ForceMain City of San Diego Pipe Meter Station Lift Station City of Poway Sanitary Sewer Master Plan February 2013 ¯ Feet 5,000 Capacity Evaluation 4-26 City of Poway Sanitary Sewer Master Plan February 2013 This page intentionally left blank. 5-1 City of Poway Sanitary Sewer Master Plan February 2013 Chapter 5 Operations and Maintenance Evaluation Although not typically part of a Master Plan, the City has requested an operations and maintenance assessment which is presented in this chapter. Included are the following components: Assessment of the Cleaning/Preventative Maintenance Program; Assessment of the Physical Inspection Program including Video (CCTV) and Manhole Inspection and Rehabilitation; Identification and Elimination of Inflow and Infiltration; Evaluation of existing lift stations; System odor assessment; and, Assessment of the central Oak Knoll siphon structure, one of two key transition points into the City of San Diego’s wastewater transmission system. 5.1 Background The operations and maintenance portion of the City’s Wastewater Utilities Program is in the Public Works Department. Public works personnel partner with engineers in the City’s Development Services Department to deliver the full spectrum of services necessary to ensur e a well-functioning wastewater system that meets the current and future needs of the community. System information collected during operations and maintenance activities is provided to engineers in the Development Services Department who make final determinations regarding design for projected needs, capital improvement projects for repair and prioritization of competing demands. Poway’s Public Works’ Wastewater Utilities Program is responsible for the inspection, operation, and maintenance of Poway’s wastewater collection system including access manholes and related appurtenances. Additionally, this Program is responsible for ensuring the implementation of City and regulatory agency policies and procedures to ensure that wastewater operations are effective and economical. A well-maintained sanitary sewer system is critical to preventing community nuisances such as odors resulting from high hydrogen sulfide gas (H2S), as well as preventing sewer spills for the mutual protection of surface waters and the overall environment to safeguard public health and safety and potentially result in significant penalties and fines. 5.2 Approach To establish an understanding of Poway’s current wastewater collection system inspection, operation, and maintenance procedures, Atkins conducted a review of Poway’s Sewer System Management Plan (SSMP) and met with Wastewater Utilities Division staff to discuss current inspection and maintenance measures. It is important to note that at the time of Atkins’ initial evaluation, the program was undergoing an important transition to a more systematic and comprehensive approach under a new supervisor and including several new employees. An update to the SSMP was also underway. Operations and Maintenance Evaluation 5-2 City of Poway Sanitary Sewer Master Plan February 2013 Atkins’ evaluation supports the changes already underway in the preventative maintenance and physical inspection programs and offers suggested considerations for continued development in the areas of Inflow and Infiltration (I/I) reduction, Oak Knoll odor control and/or elimination, and necessary repairs to address asset conditions. Generally, Poway’s inspection and maintenance programs include the core elements that are reflective of industry best practices. Poway is continuing to enhance existing programs and procedures beneficial to the preventative maintenance of the sanitary sewer collection system. Following is a summary of findings and recommendations for consideration to facilitate and optimize operation and maintenance practices for the sanitary sewer collection system organized into six (6) sections as follows: 1) Section 5.3: Cleaning/Preventative Maintenance Program; 2) Section 5.4: Physical Inspection Program: i. Video (CCTV) ii. Manhole Inspection and Rehabilitation 3) Section 5.5: Identification and Elimination of Inflow and Infiltration 4) Section 5.7: Lift Station Assessment 5) Section 5.8: Odor Assessment 6) Section 5.9: Oak Knoll Siphon 5.3 Review of Cleaning/Preventative Maintenance Program To minimize and prevent system blockages that can lead to sewer spills and to preserve and extend the useful life of the sanitary system, Poway’s Preventative Maintenance (PM) program is currently centered around completing an updated citywide cleaning and video taping of the full system applying best in class practices and improved technology. An effective PM program helps identify blockages in gravity sewers caused by structural defects or by an accumulation of material in a pipe. Accumulated material can include fats, oil, grease, sediment, or other materials. Certain structural defects, such as protruding lateral connections or cracked pipe, may catch debris, which then causes further buildup of solids that will eventually block the sewer. Root intrusion through structural defects is a major contributor to blockages. Repair or elimination of any defects that contribute to a buildup of material in a pipe should be evaluated as part of a rehabilitation program as defects will always create maintenance problems. Mechanical Cleaning Procedures Mechanical and hydraulic cleaning of sewers is a cost-effective method of removing material that interferes with the proper operation of the sewer. The objective is to remove all material clinging to the interior surface of the pipe so that the sewer pipe can carry full pipe flow without any restrictions that might result in blockages due to reduce pipe capacity. The City of Poway Wastewater Utilities staff conducts routine mechanical cleaning of Poway’s wastewater collection pipelines at varying rates using a combination jet rodder/vactor truck. Current goals include completing a cleaning of the whole system in 18-24 months to provide an updated baseline upon which to build the future program. Operations and Maintenance Evaluation 5-3 City of Poway Sanitary Sewer Master Plan February 2013 After this initial citywide cleaning assessment is complete and fully documented, the data will be used to develop a customized cleaning program that most appropriately addresses varying and unique system characteristics such as age of pipe, type of pipe, roots, system design, areas of buildup and new repairs. In keeping with current best industry practices, this means that certain areas of the city may be cleaned and inspected more than once a year but other areas of the city showing no issues may be put on a one- to three-year schedule. This approach ensures the most efficient use of staff and equipment resources. The crews are also working closely with the City’s Information Technology team to identify the best use of technology to implement the tenants of asset management that will automate the Work Book process, future cleaning schedules and replacement evaluations. The locations and maintenance history of Poway’s maintained wastewater system pipes and associated appurtenances are currently documented with handwritten notations in forty -two (42) Work Books and Map Books. Crews complete one Work Book at a time, cleaning from north to south and east to west in the direction of flow to convergence locations. Crews can take anywhere from one to six weeks to complete a Work Book depending on the number of pipeline segments included in the respective Work Book, as well as the need to re -prioritize work to address emergencies and customer service calls. Documentation standards have been enhanced so that findings and maintenance details are entered into the asset management system to lay the groundwork for automated work scheduling in the future. High Frequency Maintenance Locations At the time of initial evaluation, Poway was re-organizing and systematizing this aspect of the preventative maintenance program and has since completed this work. The PM program includes special attention to locations that have been identified as “hot spots.” Hot spot locations include pipeline locations that rapidly accumulate excessive amounts of grease and sludge, root concentrations and possible pipe sags. These locations are placed on a High Frequency Maintenance Location (HFML) list for cleaning on a monthly or quarterly basis. Videotapes for locations that may benefit from an engineered solution are forwarded to engineering staff for evaluation. Additionally, those locations that may benefit from education about practices that keep fats, oils and grease (FOG) out of the wastewater system are referred to the City’s FOG program so that the property owner can be contacted regarding findings and possible solutions. Root Treatment Poway’s preventative maintenance effort also includes a contract root treatment component for routine chemical treatment to select portions of the wastewater collection system. The root treatment process includes the applications of chemical root inhibitors to reduce or eliminate roots intruding into the pipes. Pipelines identified as locations with root intrusion problems are treated and evaluated regularly. Target sites for root treatment are generally located in the older developed areas of Poway and total approximately 12,000-13,000 linear feet of pipe or 1.32% of the system. Poway maintains a list of locations that require root treatment on a routine basis. As locations are identified for root control, location information is recorded and evaluated for inclusion in the subsequent treatment cycle. Poway has established a video (CCTV) inspection schedule for locations that have been Operations and Maintenance Evaluation 5-4 City of Poway Sanitary Sewer Master Plan February 2013 identified and treated for root control to ensure data is available should warranty work be required of the contractor. 5.3.1 Recommendations for Preventative Maintenance Program Metrics: At the time of this evaluation, Poway was developing performance metrics for the PM program, which have since been completed. These metrics are used to measure progress and effectiveness. Work assignments are established including weekly cleaning and inspection goals for the PM crew. Weekly goals are developed in consideration of diameter of pipe (larger diameter pipe takes longer to clean than smaller diameter pipe), type of pipe and other system characteristics. Progress reviews consider unforeseen emergencies, and other impediments such as rain and traffic easement access that interrupt progress on any given day. Random Video Inspection: Since the time of evaluation, Poway has also enhanced training regarding customizing the cleaning approach in consideration of system characteristics including selection of proper method (e.g. mechanical or hydraulic) and equipment (e.g. rodding, balling, jetting, etc.) as well as cleaning speed and effectiveness. Currently, as PM staff progresses through the city completing the collection of citywide baseline data, the video inspection unit follows the vactor/jet rodder. This provides a natural process for checking the effectiveness of the cleaning through the follow-on video and provides the cleaning operator with feedback as well as completing the data set for each system section. Once Poway’s citywide baseline cleaning and inspecting effort is complete, Poway should consider switching to randomly video inspecting within two (2) weeks after cleaning for continued quality control and operator feedback. Further Customization of the HFMLs: Once Poway has compiled complete data for HFMLs, including as-built data; pipe locations, lengths and diameters; current cleaning frequency intervals; sewer overflows for that specific segment; at least four condition findings; and CCTV inspection data for the last 12 months, PW crews in consultation with engineering staff should evaluate the data to determine if the interval between cleanings should be adjusted. Cleaning frequencies may be decreased, increased, or maintained considering condition findings thereby furthering Poway’s effort to develop a customized program that makes best use of human and equipment resources. This data should also be reviewed for identification of potential engineering solutions for ongoing maintenance problems. 5.4 Review of Physical Inspection and Assessment A physical inspection program for the wastewater collection and transportation (conveyance) system is necessary to implement the systematic maintenance program currently under development in the City. Elements of a physical inspection program include visual and equipment-based techniques that use established industry methods of system evaluation. Regularly scheduled physical inspections should be included in the ongoing development of the preventative maintenance program. The purpose of conducting inspections is to: Maintain an accurate inventory including component and location information Determine and monitor the condition of the components (assessment) Operations and Maintenance Evaluation 5-5 City of Poway Sanitary Sewer Master Plan February 2013 Identify defects in the system that can contribute to or cause backups, overflows and bypasses Identify chronic problem areas so maintenance can be planned and scheduled Identify defects requiring repair to identify optimal method to rectify problems and avoid potentially more expensive emergency repairs Develop a baseline for future comparison to determine rates of deterioration Inspection provides detailed system characteristics of the system that includes size, material, condition, line sags, joint types, elevations, slopes, location of manholes and pump stations, location of lateral connections and other system attributes that are necessary for managing the entire operations and maintenance program. Inspection data also provides location information that allows more efficient planning and scheduling, and especially emergency response. During blockages that involve overflows and/or backups, valuable time is lost if location information is not available, increasing the risk of regulatory violations, property and environmental damage, and threats to public health and safety. Video Inspection (CCTV) As noted above, Poway is currently completing an updated citywide cleaning and video inspection (CCTV) of the full wastewater collection system applying best in class practices and improved technology. Regular and systematic CCTV and assessment of sanitary sewer pipeline facilities provides a means to monitor the condition of the facilities, the effectiveness of the maintenance operati ons, and provides a basis for identifying and scheduling capital improvements. As noted by the Environmental Protection Agency, CCTV is the most frequently used, most cost efficient in the long term, and most effective method to inspect the internal condition of a sewer. As well, the overall assessment results can be used to determine the funding required for repairing, rehabilitating, and replacing an aging collection system, to prioritize the allocation of funds, and optimize the expenditure and efforts to effectively and efficiently operate a sewer collection system. Poway performs CCTV inspections systematically one Work Book at a time. They are generally done on a daily basis subsequent to the cleaning of pipelines (until the citywide baseline data collection effort is complete), installation of all new pipelines, and the rehabilitation of pipelines to ensure contractor compliance with Poway design and construction standards. Poway’s CCTV truck is equipped with Granite XP software developed by Cues. The inspection codes incorporated in the software are National Association of Sewer Service Companies (NASSCO) certified and comply with the Pipeline Assessment and Certification Program (PACP). Daily CCTV inspection progress is manually recorded in the Work Books and subsequently in Poway’s Cartegraph system for documentation, tracking, and reporting purposes. Information pertaining to sewer inspection activities includes lineal footage televised, pipe size, pipe length, names of staff performing the videotaping, and additional information about system characteristics found in the televised area is entered into the system. Continued work in this Operations and Maintenance Evaluation 5-6 City of Poway Sanitary Sewer Master Plan February 2013 area includes optimizing field technology efforts to eliminate double-recording of work and facilitate generation of automated work scheduling in the future. Staff is also integrating video information into the GIS system for immediate, automated single-point access. The information obtained and recorded from the CCTV inspections is downloaded to the City server at the end of each work shift. A hard drive is maintained on the CCTV truck for potential future reference while an additional copy of the CCTV video is forwarded to Poway’s Development Services Department to facilitate access and reference by the engineeri ng section. The information contained on the hard drive is ultimately stored on the City of Poway server. Manhole Inspection Manholes are essential components of the sewer collection system and are often the only points of access into the underground infrastructure for conducting important maintenance tasks for pipes such as cleaning, rehabilitation, and inspection. Without manholes, open-cut excavation and diversion of street traffic would be the only means of access. Areas of spalled concrete and exposed aggregate are now typical for pre -cast concrete manholes reaching the end of their 50-year lifecycle. Manholes constructed today use materials such as HDPE, concrete with corrosion reducing additives and plastics, and typically include liners for added protection. As an integral part of the wastewater collection system, access manholes require the same degree of inspection and maintenance as the pipeline sewer network. Manhole inspections are generally visual and include evaluating the condition of the manhole cover, ring, cone, barrel, rungs (if present), trough, and bench for any defective condition. Manholes should be inspected on a routine basis to ensure they are in adequate condition and are accessible. Older man holes may require more frequent inspections to detect signs of possible water intrusion, H2S deterioration and ensure structural integrity. At the time of initial review, Poway was transitioning to a formal, proactive systematized manhole inspection program to replace an as-needed inspection program. Manhole Rehabilitation Since 1997, Poway has maintained a manhole rehabilitation program which has historically included the completion of approximately 150 to 250 manholes per year with a total of about 2,000 manholes (of 4,000+ total) rehabilitated to date. The program was temporarily discontinued in 2011 for program evaluation. Currently, as workload allows, crews are confirming inventory and refining the list of approximately 250 to 300 manholes identified as priorities for rehabilitation. 5.4.1 Recommendations for Physical Inspection Program Frequency: As noted previously, Poway is currently performing city-wide PM and CCTV inspections to collect an updated system baseline ensuring that data is complete, c orrect and current. While cleaning of the system is targeted for 18-24 months, the baseline CCTV completion goal is 2.5 to 3 years. Once the system has been completely inspected and conditions documented and quantified, scheduled inspections will be priori tized based on need Operations and Maintenance Evaluation 5-7 City of Poway Sanitary Sewer Master Plan February 2013 and availability of resources rather than simply re-inspecting the entire system using CCTV. This may result in an acceptable range of 3 to 10 years for repeat video inspection customized to system characteristics. Standardization of Video Review: At the time of evaluation, Poway was developing standardization criteria and securing NASSCO and PACP training for field crew members and engineers to support standardized assessment and documentation practices. Training has been completed since that time and the following standardization practices have been implemented: Inspection of entire pipe segments between manholes (including conducting reverse pulls when necessary and documenting accordingly) Standardized defect codes and severity ratings Defect notations include use of appropriate severity defects Pacing for proper inspection of pipe and joints Documentation of debris location (possible sags) Use of verbal documentation feature Use of defect observation codes in conjunction with digital information to document the condition of the entire pipe segment Inclusion of pipe material and size on inspection reports Standardization of Manhole Inspection: At the time of evaluation, Poway was developing standardized inspection procedures and rating system. It is recommended that Poway continue to pursue implementation of NASSCO’s Manhole Assessment criteria to ensure consistency of documentation and a repeatable process for evaluation. This approach will support a long -term consistency rather than simply reacting when problems arise. The goals of the NAASCO system coding are to define attributes and features of the structure, document and explain defects, develop ratings for each applicable component of a manhole (structural rating, operations and maintenance rating, inflow and infiltration rating) and record dimensional data that can be used for selecting the appropriate rehabilitation methods. This standardized method for reporting the results of condition assessments ensures consistency across employees, promotes costs efficiency, and avoids unnecessary rehabilitation work. NASSCO standardized manhole inspection includes the following information: Exact location and access characteristics of the manhole (e.g. inaccessible, within easement, buried, etc.) Diameter of the clear opening of the manhole Condition of frame and cover (include defects that allow water inflow to enter) Whether access manhole lid is located at proper grade or elevation Whether cover is subject to ponding or surface runoff Type of material and condition of the cone and walls Condition of lining if previously rehabilitated Improvement condition of the rungs, cone and riser joints Configuration, size, and type of the incoming and outgoing lines (including drops) Signs of leakage in the riser or damage to the frame’s seal Observed water infiltration sources and rate of infiltration Height of surcharge Operations and Maintenance Evaluation 5-8 City of Poway Sanitary Sewer Master Plan February 2013 Manhole Rehabilitation Program: It is recommended that efforts to complete the updated inventory of already rehabilitated manholes and prioritization of manholes needing rehabilitation based on NASSCO’s standardized manhole inspection criteria be continued. Manholes experiencing water intrusion should be evaluated for installation of watertight seals to eliminate intrusion into manholes that are otherwise structurally sound. Easement Access: Poway should continue efforts to clear easements as possible to ensure easy, speedy access to manholes in case of emergency. Continued encroachments mapping efforts are also important to ensure accurate information regarding obstructions is available for work planning and emergency response. 5.5 Identification and Elimination of Inflow and Infiltration Controlling wet weather peaking is important to avoid costly and unnecessary sewer system over-sizing, prevent sanitary sewer overflows, and prevent increased wastewater treatment costs. Wet weather occurrences, and the resulting flows, are categorized in two major categories known as Inflow and Infiltration (I/I). “Inflow” includes large flows over a short duration coming from specific point sources such as illicit connections to the sewer system from storm drains or roof drains while “Infiltration” includes flows due to seepage into the sewer system (such as cracked sewer pipes or seepage at pipeline joints). As discussed in Chapter 4, a general assessment of the inflow and infiltration entering Poway’s sanitary sewer system was made by evaluating flow records from Meter PO-2 during a storm event that occurred between December 20 and 22, 2010. The storm event produced approximately 6 inches of precipitation, which correlates closely to a rainfall event that is between a 10-year and 25-year design storm for San Diego County. Average daily flow rates were calculated for Poway based upon the metered flows and then compared to the average annual flow to estimate the rainfall dependent infiltration into the system. Based on the results, it was determined that Poway does have a significant amount of I/I in some areas of the City. Measures implemented by Poway staff to identify points of I/I include performing smoke tests and conducting routine and systematic inspections of the wastewater collection system including pipelines and manholes. Smoke tests are performed to locate potential points of inflow into the sanitary sewer system that could result in high flows and/or sanitary sewer overflows. CCTV inspections of the system pipelines are performed to identify breaks, root intrusion, leaking water (infiltration from groundwater), and general deteriorating conditions. Additionally, the visual inspection of manholes is conducted to obtain additional information concerning the presence and degree of inflow and infiltration problems and the general structural condition of the manhole. 5.5.1 Recommendations for Addressing Inflow and Infiltration Smoke Testing: It is recommended that Poway continue its efforts to re-establish regular smoke testing in specific areas where I/I is suspected and at locations where an immediate increase in flows are noted and/or measured subsequent to rainfall events. Operations and Maintenance Evaluation 5-9 City of Poway Sanitary Sewer Master Plan February 2013 CCTV Inspection: As well, CCTV inspection should continue to be conducted as it offers valuable insight to the internal structural condition of buried infrastructure and serves to identify the existence and severity of defects which could also contribute to potential sanitary sewer overflows. As system defects and deficiencies are identified, they should be included in the repair/rehabilitation program and scheduled for implementation. Manhole Rehabilitation: Manholes also offer an important opportunity for addressing the costly problem of I/I. A manhole is essentially a vertical pipe that gives access to the horizontal pipes that form a collection system. An 8-foot deep manhole of typical design has about the same surface area as a 50 foot segment of 8-inch pipe. When thought of in terms of underground surface area, Poway’s 4,000+ manholes create significant unwanted opportunities for illicit inflow. Therefore, Poway’s continued work to re-institute its manhole rehabilitation program including identification of manholes that would benefit from installation of watertight seals will support correction of I/I problems. 5.6 Review of Other System Components and Issues Previous sections of this chapter have focused on PM and CCTV of the 185 miles of wastewater system transmission pipes and inspection and rehabilitation of Poway’s over 4,000 manholes. Poway’s system also includes five (5) lift stations and force mains and the Oak Knoll Siphon, which has three barrels. Each of these additional system components require special attention and maintenance to ensure optimal system functioning. Assessment information and recommendations are discussed in the following sections. 5.7 Lift Station Assessment Operation, maintenance and repair of pump stations require special electrical, hydraulic and mechanical knowledge. Proper design, construction and operator training are also important. All of Poway’s lift stations are equipped with secondary power or have a back-up power plan and each has a telemetry system that transmits alarms to a central location should problems occur. Poway’s maintenance program is based on the two (2) necessary factors: the equipment manufacturers’ recommendations and specific requirements for individual stations. Staff conducts weekly inspections of the wastewater lift stations and performs necessary maintenance according to manufacturer’s recommendations for activities such as lubrication of bearings, oil changes, and parts replacement. Additionally, staff monitors e ach station for leaks, noise, vibrations, flow levels, and odor control. A SCADA system is used for remote monitoring and alarm communication. Maintenance of the stations’ electrical systems is conducted on a yearly basis and wet wells are cleaned on a quarterly basis. Maintenance activities are scheduled and performed to maintain the system in operational condition. Maintenance and repair activities, as well as related important information is manually recorded by the crew and subsequently entered into Poway’s Cartegraph system and used for recording, tracking, and reporting purposes. The department is currently in the process of incorporating the work plan and historical maintenance activities into the Cartegraph system. Operations and Maintenance Evaluation 5-10 City of Poway Sanitary Sewer Master Plan February 2013 Each lift station was visually inspected with Poway operations staff to assess the physical condition of the facilities. The lift station’s structure, wet well, odor control, instrumentation, pumps, and motors were inspected and assessed as summarized below. 5.7.1 Old Coach (LS-1) Lift Station The Old Coach Lift Station (LS-1) was constructed in 1999 and is located on the private Maderas Golf Club, near the eighth hole of the course. The station has a separate dry and wet well and utilizes two centrifugal pumps in the dry well. The station is well maintained by Poway staff and is in good physical condition. However, the existing pumps are not equipped to handle peak inflows causing the wet well to fill and back up the incoming gravity sewers. Additionally, the existing emergency generator is a Tier 1 emergency generator, which is outdated. The two pictures to the right present the observed affects in the wet well from the smaller pump capacity and the outdated emergency generator. The existing pumps have a firm capacity of 170 gpm, which is smaller than the firm capacity of the Heritage Lift Station (LS-5) of 280 gpm. The existing pumps should be replaced with pumps that can deliver a firm capacity of 660 gpm, which is equal to the estimated local 2030 peak wet weather inflow (380 gpm) plus the Heritage Lift Station (LS-5) maximum pumped flow (280 gpm). Additionally, the existing emergency generator should be replaced with a new Tier 3 or Tier 4 emergency generator. Based on the capacity analysis in Chapter 4, the lift station currently has approximately 1.7 hours of emergency storage under existing conditions and is expected to have less than one hour of storage under future conditions, all of which are less than the recommended minimum two hours of storage. With the emergency generator on site, installing additional storage may not be a priority at this time 5.7.2 Saint Andrews (LS-2) Lift Station The Saint Andrews Lift Station (LS-2) was originally constructed in 1965 and upgraded in 2011 to replace pumps, electrical equipment, and rehabilitate the wet well. The lift station is located adjacent to a single family residence abutting the Stoneridge Country Club. The station has a separate dry and wet well and utilizes three progressive cavity pumps in the dry well. The lift station does not have an emergency generator on site, but can accommodate a portable generator during an outage. The station is well maintained by Poway staff and is in good physical condition. However, Poway staff is currently evaluating whether to move the spring loaded check valves from their existing horizontal location to the pump discharge’s vertical stem prior to the force main header. 5.7.3 Camino Del Valle (LS-3) Lift Station The Camino del Valle Lift Station (LS-3) was originally constructed in 1979 and upgraded in 2007. The facility is located behind Camino Del Valle and is accessed from the nearby horse trail. The station has a separate dry and wet well and utilizes t hree centrifugal pumps in the dry well. The station is well maintained by Poway staff and is in good physical condition. This lift Operations and Maintenance Evaluation 5-11 City of Poway Sanitary Sewer Master Plan February 2013 station is critical to Poway’s sanitary sewer system as it receives and pumps flow from a large portion of North Poway. A new emergency generator was recently installed for the station, and the station is also equipped with an at grade force main connection for portable pumps during an emergency. Poway has experienced frequent ragging problems at this lift station and currently has plans to install and test a new pump equipped with an inline cutter. If the cutter is insufficient to prevent clogging of the pump, it is recommended that an in-line grinder be installed and tested. The lift station currently has less than an hour of emergency storage, which is less than the recommended minimum two hours of storage. With the emergency generator on site, installing additional storage may not be a priority at this time. The picture to the right shows the at-grade emergency force main connection. 5.7.4 Highlands Ranch (LS-4) Lift Station The Highlands Ranch Lift Station (LS-4) was originally constructed in 1988 and upgraded in 2010. The lift station is located adjacent to a single family residence on Highlands Ranch Road. The station has a separate dry and wet well and utilizes two centrifugal pumps in the dry well. The lift station does not have an emergency generator on site, but can accommodate a portable generator during an outage. The station is well maintained by Poway staff and is in good physical condition. However, Poway staff has noticed that the dry well manhole shaft (see photo) has shifted and is now off center from the manhole cone. The misalignment has resulted in a gap at the joint at which there is moderate infiltration. Poway staff is currently looking into products that will properly seal the joint to prevent the continued infiltration. 5.7.5 Heritage (LS-5) Lift Station The Heritage Lift Station (LS-5) was constructed in 2003 and is located in a private gated community north of the private Maderas Golf Club on Heritage Drive. The station has two submersible pumps and has been designed to accommodate anticipated future growth. The station does not have an emergency generator on site, but can accommodate a portable generator during an outage. The station is well maintained by Poway staff and is in good physical condition. Poway desires to replace its existing carbon canister which supplies passive odor control to the facility, because the spent media requires HAZMAT disposal. Poway should evaluate other non-hazardous passive odor control applications as well as active odor control utilizing chemical injection similar to the other smaller stations. The two pictures to the right present the wet well and submersible pumps and the existing carbon canister. Operations and Maintenance Evaluation 5-12 City of Poway Sanitary Sewer Master Plan February 2013 5.8 Odor Assessment To prevent odors within the sewer system Poway utilizes chemical feed with the odor control agent Bioxide at all of its lift stations except Camino del Valle. Chemical feed has been successful in reducing odor problems within the four lift stations. Most odor complaints come from areas closest to the Oak Knoll siphon. In order to assist in developing recommendations to prevent odors at this location a visual inspection was performed at the siphon to assess its current operations. 5.9 Oak Knoll Siphon Sewage siphons are designed to convey wastewater under low areas such as the bed of a stream or river without the use of pumps. Siphons are made up of an inlet and outlet chamber connected by closed pipes or conduits through which wastewater flows under pressure. The driving force causing wastewater to flow is the hydraulic head in the inlet chamber. The individual pressurized pipes or conduits are normally smaller in diameter than the gravity system they are serving, causing the wastewater to flow at higher velocities. The higher velocity is meant to keep the heavier solids normally found in wastewater in suspension, avoiding the deposition of solids that could otherwise accumulate in the pressurized pipes and interfere with the free flow of the wastewater. Typically, there is a need for frequent siphon monitoring and maintenance due to the probability of solids deposition and the potential for chronic overflows. The Oak Knoll Siphon is a critical juncture in Poway’s collection system as all flow culminates at this single connection point to the City of San Diego’s system. It consists of an older and newer section. The older section includes approximately 677 feet of 8- and 15-inch diameter siphon and was constructed in 1980. The newer section was installed in 1991 and includes approximately 768 feet of 18-inch diameter siphon. A visual inspection of the siphon was conducted to assess odors, the hydraulic conditions of the inlet and outlet structures, and overall condition of the structures. The results of the visual inspection are summarized below. 5.9.1 Inlet Structures Old Siphon Inlet Structure During a site visit, Atkins and Poway staff observed the old inlet structure had an offensive odor attributed to a wastewater stream with elevated levels of H2S gas. The structure was corroded, with exposed aggregate, but there was no visible rebar which indicates that the corrosion has primarily affected only the surface of the structure. The flow profile within the structure was highly turbulent with a waterfall affect occurring over the dike structure that separates the 8-inch from the 15-inch siphon, as shown on the picture to the right. In addition, four private late ral connections were identified as connecting perpendicular to the flow; however, during the site visit, flow was not observed. Based on the size of the lateral connections and the topology of the local properties, it was assumed that three of the connections were likely force main connections and one of the connections is likely a gravity connection. Because these lateral connections are Operations and Maintenance Evaluation 5-13 City of Poway Sanitary Sewer Master Plan February 2013 perpendicular to the flow, they have a high potential to cause additional turbulence and odor in the inlet structure, which was evident from the corrosion identified near their discharge, as shown in the pictures on the previous page. Turbulent flows typically generate odors and release H2S gas, which results in pipe and structure corrosion. New Siphon Inlet Structure The new inlet structure had a noticeable odor, attributed to a wastewater stream with elevated levels of H2S gas. The structure itself did not appear to have major corrosion issues, but the existing liner on the inlet siphon pipeline was identified as peeling up. In addition, the downstream angle point, which causes flows to be diverted to the old siphon, had captured a significant amount of rags and was producing a lot of turbulence. When the rags were removed, the turbulence was reduced; however, it was not eliminated because the diversion angle point extends into the flow path. The picture on the left shows the diversion angle point and the turbulence produced by it. 5.9.2 Outlet Structures Old Siphon Outlet Structure The old outlet structure had a slight odor, attributed to a wastewater stream with elevated levels of H2S gas. The structure did not appear to have major corrosion issues however the existing liner on the outlet siphon pipelines appeared to have minor peeling, specifically in the 8-inch diameter pipeline, which is evident in the picture to the right. New Siphon Outlet Structure The new outlet structure had a moderate odor, attributed to a wastewater stream with elevated levels of H2S gas. The structure appeared to have major corrosion issues along the shelf and within the flow channel, as shown on the picture to the left. However, the manhole shaft appeared not to have major corrosion, suggesting that the liner was not applied to the shelf or flow channel. Gas detectors were placed in the siphon inlet and outlet structures , as well as four sites upstream to determine whether the gas generation is localized or is being caused upstream. Figure 5-1 presents the locations of the gas monitors that were utilized. Each gas detector had the ability to read H2S gas readings in parts per million (PPM) over approximately a 20 hour period depending on battery life. Table 5-1 presents the results of the gas monitoring. Operations and Maintenance Evaluation 5-14 City of Poway Sanitary Sewer Master Plan February 2013 Table 5-1 H2S Readings Manhole Description Max H2S Reading (PPM) Number of Occurrences H2S > 3 PPM (Rotten Egg) Number of Occurrences H2S > 10 PPM (Offensive Odor) U3-054 New Siphon Discharge 6 90 0 U3-060 Old Siphon Discharge 4 11 0 V3-001 Old Siphon Inlet 16 565 236 V3-002 New Siphon Inlet 8 497 0 V3-005 New Trunk Sewer (Pomerado) 5 129 0 V3-055 Old Trunk Sewer (Pomerado) 10 308 1 U3-071 Oak Knoll (Montauk) 2 0 0 U5-059 Community Park (Bowron) 3 1 0 Based on the gas monitor readings and the visual inspections, it was evident that the H2S generation and subsequent odors were being caused by the old siphon inlet. Figure 5 -1 graphically presents the H2S gas readings and the model predicted flow rate over the given monitoring period. Figure 5-1 H2S Readings Manhole V3-001 Old Siphon Inlet Operations and Maintenance Evaluation 5-15 City of Poway Sanitary Sewer Master Plan February 2013 As shown on the figure, the higher H2S concentrations occur during periods of higher flow. Similar graphs were prepared for each monitored manhole and are provided in Appendix G for reference. In some cases, air may vent from the inlet structure due to pressure upstream of the siphon creating the potential for odor problems. To relieve these conditions air jumpers, or air lines, may be installed along the siphon barrels to move air from the inlet to the outlet structures. After further analysis, Poway has determined that installing air jumpers would be an appropriate solution for the siphon and is currently in the process of designing the air jumper. 5.9.3 Recommendations for Oak Knoll Siphon Odor Control: In some cases, air may vent from the inlet structure due to pressure upstream of the siphon creating the potential for odor problems. To relieve these conditions air jumpers, or air lines, may be installed along the siphon barrels to move air from the inlet to the outlet structures. After further analysis, Poway has determined that installing air jumpers is an appropriate solution for the siphon and is proceeding with design and construction. In the meantime, a temporary odor control system has been installed and is in operation and maintenance visits have been increased from once a month to once a week. Operations and Maintenance Evaluation 5-16 City of Poway Sanitary Sewer Master Plan February 2013 This page intentionally left blank. 6-1 City of Poway Sanitary Sewer Master Plan February 2013 Chapter 6 Proposed Capital Improvement Projects This chapter presents the proposed Capital Improvement Program (CIP) projects based on the findings of the Master Plan and includes: Development of Unit Costs; Identified sanitary sewer improvement projects Capital Improvement Project Summary of Cost and Timing; and Proposed Condition Upgrades and estimated costs Detailed CIP projects developed for Poway’s sanitary sewer system are prioritized capac ity or reliability improvements to the existing system. The CIP has been divided into four phases. Priority 1 and 2 (2012-2017) projects represent high priority projects that should be planned or constructed over the next five years. Lower priority projects are indentified as Phase 3 and 4 projects that would be phased through 2030. 6.1 Development of Unit Costs The unit cost estimates reflect full capitalization inclusive of planning, engineering design, environmental, legal, construction, construction management and contract administration. The values are presented in mid-2012 dollars based on an anticipated ENR Construction Cost Index (ENR-CCI) of 9969 for the Los Angeles/Orange County area. Unit costs were also compared to previous studies done for similar clients, such as Vallecitos Water District and the County of San Diego. These estimates are based on representative available data at the time of this report; however, since prices of materials and labor fluctuate over time, new estimates should be obtained at or near the time of construction of proposed facilities. A scaling factor has been included to account for pipeline projects that are relatively short in distance or have more significant environmental or construction challenges. 6.1.1 Pipelines Base unit costs for pipeline material and installation including repaving and system appurtenances that, collectively, constitute principal elements of the wastewater collection system facilities, are presented in Table 6-1. The unit costs provided reflect an average cost for full capitalization inclusive of planning, engineering design, environmental, legal, construction (including all appurtenances), construction management and contract administration. Special circumstances (e.g., jacking, trenchless installations, tunnels, etc.) are considered separately on a case-by-case basis. A scaling factor was applied to each project to account for project specific issues such as difficult conditions, constrained access, congested areas, etc. Proposed Capital Improvement Projects 6-2 City of Poway Sanitary Sewer Master Plan February 2013 Table 6-1 Pipeline Unit Costs Diameter (inches) Sewer, Gravity 10 $230/LF 12 $280/LF 15 $340/LF 18 $450/LF 21 $530/LF 27 $610/LF 6.1.2 Lift Stations Lift station upgrades are primarily due to anticipated peak wet weather flows and lift station pumping capacities. The Old Coach Lift Station will likely require pump replacements and upgrades to the emergency generator. The Camino del Valle Lift Station will also require pump upgrades to accommodate peak wet weather flows should one duty pump be out of service. Unit costs for lift station projects were estimated to be approximately $1,000 per gpm. Unit costs for upgraded pump stations that simply required pump replacements were estimated to be $80 per gpm. This assumes no retrofit of the building itself is required to accommodate the new pumps. 6.2 Priority Sanitary Sewer Improvement Projects Trunk sewer deficiencies in the existing system with peak wet weather flows routed through the network model have been presented in Figure 4-24. Only a few areas were identified in the existing system to be hydraulically deficient based on surcharging and/or depth to diameter ratio. In general, results of the existing system capacity analysis are used to prioritize facility improvements, which are sized based on the 2030 flow analys is. A wet weather sensitivity analysis was performed using storm events from January and December 2010, which are representative of a 2 to 5-year and 10 to 25-year storm event, respectively. The proposed sanitary sewer improvement projects are shown on Figure 6-1. Detailed analysis results for both existing and 2030 analysis are included in Appendix H. Where improvements were deemed necessary, the associated pipeline was assigned a priority ranking from 1 to 4, with 1 being of the highest priority and 4 being of the lowest. The highest priority are pipes with deficiencies under existing peak dry and wet weather flows, with decreasing priority due to the sensitivity of the hydraulic analysis parameters. Priority rankings were assigned to deficiencies based on the following criteria: Priority 1: Sewers 15-inch in diameter or smaller with a ratio of flow depth to full diameter (d/D) greater than 50 percent under existing dry weather conditions and a d/D ratio greater than 90 percent under existing wet weather conditions for both storm events were assigned a priority value of 1 and classified as hydraulically deficient with a high risk of sanitary sewer overflows. Proposed Capital Improvement Projects 6-3 City of Poway Sanitary Sewer Master Plan February 2013 Priority 2: Sewers with no dry weather deficiencies but a d/D greater than 90 percent under existing wet weather conditions for both storm events were assigned a priority value of 2 and classified as hydraulically deficient with a high risk of potential sanitary sewer overflows. Priority 3: Sewers 15-inch in diameter or smaller with a ratio of flow depth to full diameter (d/D) greater than 50 percent under existing dry weather conditions and a d/D ratio greater than 90 percent under existing wet weather conditions for only the December 2010 storm event were assigned a priority value of 3 and classified as hydraulically deficient with a moderate risk of sanitary sewer overflows. Priority 4: Sewers with no dry weather deficiencies but a d/D ratio greater than 90 percent under existing wet weather conditions for only the December 2010 storm event were assigned a priority value of 4 and classified as hydraulically deficient with a moderate risk of sanitary sewer overflows. Poway should consider implementing Priority 1 and 2 projects within the next 2 to 5 years due to existing capacity deficiencies in the conveyance pipelines. Priority 3 and 4 projects are driven based on hydraulic results from a modeled 25-year storm event and not considered to be critical upgrades to the Poway sanitary sewer system. However, if maintenance or condition problems require the replacement of pipe in Priority 3 or 4 project locations, the proposed CIP projects should be reviewed prior to replacement. Trunk sewer deficiencies were investigated in the hydraulic model and priority pipeline improvement projects were developed using the results of both existing and 2030 analyses. There were two main steps to developing pipeline improvement projects for the Master Plan: Prioritizing hydraulic deficiencies from the model (surcharges and d/D failures) Iteratively working with the InfoWorks engine to target specific improvement projects. The benefit of this approach is noticeable when comparing Figure 4-24 and Figure 6-1; by fixing the hydraulic bottlenecks and pipes in the path of critical flow throug h Poway’s sanitary sewer system, we were able to address hydraulic deficiencies by developing ten (10) strategic improvement projects. This will help Poway spend their improvement dollars effectively, as well as provide confidence that by making the recommended pipeline improvements, their sanitary sewer system will be able to handle projected flows through 2030. A detailed description of the recommended pipeline improvement projects is provided in Section 6.3. 6.3 Recommended Improvements Projects with high priority are recommended for improvement under the proposed Poway CIP. Details such as length and diameter of pipeline projects are presented in Table 6-2 and described below. [Ú [Ú [Ú [Ú [Ú LS-4 LS-2 LS-5 LS-1 LS-3 CAP-5 C A P -3 CAP-6 CAP-8 C A P -1 CAP-2 CAP-4 CAP-7 CAP-9 OM-1 CAP-10 CAP-11 2/5/2013 LH SD Z:\Projects\IS\Poway\mxd\21812_PSMP_CIP_Phase_F6-1.mxd Proposed CIP Projects Figure 6-1 City of Poway Sanitary Sewer Master Plan February 2013 ¯ 6,000 Feet Municipal Boundary Gravity Sewer Forcemain [Ú Existing Lift Station City of San Diego Pipe 2030 WWF CIP Priority 1 Priority 2 Priority 3 Priority 4 Proposed Capital Improvement Projects 6-5 City of Poway Sanitary Sewer Master Plan February 2013 Table 6-2 Recommended Pipeline Improvement Projects Recommended Project Priority Existing Diameter (inches) Replacement Diameter (inches) Length (feet) CAP-01 1 8 12 1,864 10 15 1,826 12 15 1,143 CAP-02 1 8 15 3,800 CAP-03 2 21 27 1,583 CAP-04 2 8 12 1,859 CAP-05 3 12 15 2,745 CAP-06 3 12 15 1,323 CAP-07 4 18 21 712 CAP-08 4 15 18 1,295 CAP-09 4 8 10 370 Total 18,520 Additional collection system pipelines may be required to serve new development and septic conversion customers, but will be the responsibility of those customers to construct. As development projects are proposed, the project proponents will be required to prepare a study that will define the location and size of the proposed sewer facilities required to serve the development, including the necessary improvements to the regional collection system. Improvement projects were developed for pipes that surcharged or experienced a d/D greater than the allowable amount set forth by the design criteria under existing or 2030 peak wet weather flow conditions (d/D > 0.90) in the hydraulic model. In cases where a pipe is deficient in the existing scenario, the recommended improvement pipe was sized to handle 2030 peak wet weather flows. CAP-01: Project CAP-01 replaces surcharging pipes along Martincoit Road, between Espola Road and Camino del Valle. The 8, 10, and 12-inch pipelines are more than 50 percent full under existing peak dry weather conditions (70 percent). The pipelines are surcharged under existing peak wet weather conditions for both the 5-year and 25-year modeled storm events. Approximately 1,870 feet of 8-inch diameter pipe will be replaced with 15-inch diameter pipe and 2,970 feet of 10 and 12-inch pipeline will be replaced with 15-inch diameter pipe. This line conveys flow from the San Diego metered area PO-6 (0.19 mgd average), which accounts for 25 percent of the overall average flow in this pipeline. CAP-02: Project CAP-02 replaces surcharging pipes along Ash Hollow Crossing Road, between Butterfield Trail and the Stoneridge County Club. The 8-inch pipeline is more than 50 percent full under existing peak dry weather conditions (66 percent). The pipeline is surcharged under existing peak wet weather conditions for both the 5-year and 25-year modeled storm events. Approximately 3,800 feet of 8-inch diameter pipe will be replaced with 15-inch diameter pipe. CAP-03: Project CAP-03 replaces surcharging pipes along Poway Road, between Pomerado Road and Oak Knoll Road. The 21-inch pipeline has sufficient capacity under Proposed Capital Improvement Projects 6-6 City of Poway Sanitary Sewer Master Plan February 2013 existing and future dry weather conditions. The pipeline is surcharged under existing peak wet weather conditions for both the 5-year and 25-year modeled storm events. Approximately 1,590 feet of 21-inch diameter pipe will be replaced with 27-inch diameter pipe. CAP-04: Project CAP-04 replaces surcharging pipes along Sagewood Drive, between Orchard Bend Road and Martincoit Road. The 8-inch pipeline has sufficient capacity under existing and future dry weather conditions. The pipeline is surcharged under existing peak wet weather conditions for both the 5-year and 25-year modeled storm events. Approximately 1,860 feet of 8-inch diameter pipe will be replaced with 12-inch diameter pipe. CAP-05: Project CAP-05 collects flow from the north Poway area and directs it into the Camino del Valle Lift Station. This project was also identified as a replacement project in the previous Poway Sewer Master Plan. The 12-inch pipeline is slightly above 50 percent full under existing peak dry weather conditions (54 percent). The pipeline is surcharged under existing peak wet weather conditions for the 25-year modeled storm event, but is less than 90 percent full when modeled under a 5-year storm event. Approximately 2,750 feet of 12-inch diameter pipe will be replaced with 15-inch diameter pipe. CAP-06: Project CAP-06 replaces surcharging pipes along Powers Road, between Tassel Road and McFeron Road. The 12-inch pipeline is slightly above 50 percent full under existing peak dry weather conditions (61 percent). The pipeline is surcharged under existing peak wet weather conditions for the 25-year modeled storm event, but is less than 90 percent full when modeled under a 5-year storm event. Approximately 1,330 feet of 12-inch diameter pipe will be replaced with 15-inch diameter pipe. CAP-07: Project CAP-07 replaces surcharging pipes along Bowron Road, south of Poway Road. The 18-inch pipeline has sufficient capacity under existing and future dry weather conditions. The pipeline is surcharged under existing peak wet weather conditions for the 25-year modeled storm event, but is less than 90 percent full when modeled under a 5-year storm event. Approximately 720 feet of 18-inch diameter pipe will be replaced with 21-inch diameter pipe. CAP-08: Project CAP-08 replaces surcharging pipes along Community Road, between Hilleary Place and Poway Road. The 15-inch pipeline has sufficient capacity under existing and future dry weather conditions. The pipeline is surcharged under existing peak wet weather conditions for the 25-year modeled storm event, but is less than 90 percent full when modeled under a 5-year storm event. Approximately 1,300 feet of 15- inch diameter pipe will be replaced with 18-inch diameter pipe. CAP-09: Project CAP-09 replaces surcharging pipes along Neddick Avenue, west of Kennebunk Street. The 8-inch pipeline has sufficient capacity under existing and future dry weather conditions. The pipeline is surcharged under existing peak wet weather conditions for the 25-year modeled storm event, but is less than 90 percent full when modeled under a 5-year storm event. Approximately 370 feet of 8-inch diameter pipe will be replaced with 10-inch diameter pipe. CAP-10: Project CAP-10 upgrades existing pumps at the Old Coach (LS-1) Lift Station to provide a total pumping capacity of 660 gpm. Upgrades at the lift station also include Proposed Capital Improvement Projects 6-7 City of Poway Sanitary Sewer Master Plan February 2013 replacing the existing generator with a Tier 3 or 4 emergency generator. Project CAP-10 is assigned as a Priority 1 project as Poway staff has expressed concerns that the lift station does not operate properly and the system head/pump curves for the lift station show that the pump typically operates below its rated design flow. CAP-11: Project CAP-11 upgrades the Camino del Valle (LS-3) Lift Station with an additional standby pump with 565 gpm pumping capacity. The project has been assigned as Priority 2 as the lift station meets current flows, but during peak wet weather flows all three pumps are in operation. The additional pump would provide the lift station with a backup standby pump should a duty pump be out of service. OM-01: Based on H2S gas monitoring results conducted as part of this Master Plan, it is recommended that Poway conduct further gas monitoring within the collection system to identify other areas of potential concern. The project has been assigned as Priority 1 due to ongoing odor issues. Poway is currently in the process of designing an air jumper for the siphon. Project OM-1 will include construction of the air jumper following the design phase. CON-01: Based on visual inspection and observed condition of pipelines as part of the routine cleaning and videoing program, Poway should identify and prioritize pipeline segments for rehabilitation. CON-02: Based on visual inspection and observed condition of manholes as part of the routine cleaning program, Poway should identify and prioritize manholes for rehabilitation. 6.4 Condition Related Improvement Projects Addressing the needs of the City’s wastewater collection system is essential to avoiding sewer overflows and for efficiently operating the collection system. There fore, it is imperative that appropriate budgetary estimates for pipeline rehabilitation and replacement improvements be identified to mitigate potential system deficiencies. As discussed in Chapter 5, a review of system specific CCTV video inspection data was not performed as part of the Master Plan and therefore, specific pipeline improvements are not included. However, based on the analysis of other agencies operating and maintaining wastewater collection systems within San Diego County having similar c haracteristics, it is recommended that the City continue to conduct the routine CCTV video inspection and condition assessment of the sanitary sewer system to obtain information pertaining to the internal structural condition of the buried infrastructure and identify the existence and severity of defects which could contribute to potential sanitary sewer overflows. The Granite XP software used by City staff incorporates the industry standard NASSCO inspection codes for documenting system defects. Included with the various NASSCO codes is a severity rating system using a numeric method, with values ranging from 1 to 5, for expressing and summarizing the occurrences of structural and maintenance related observations that are noted by the operator during the field inspections. Though the defect codes do not provide details pertaining to the specific defects, they serve to document the type of defects observed while the encoded severity ratings document the preliminary severity of each defect. As the conditions of the pipe may include both structural and maintenance related conditions, often the Proposed Capital Improvement Projects 6-8 City of Poway Sanitary Sewer Master Plan February 2013 results overlap and ratings are provided for both conditions. As such, agencies are able to augment the standard codes to include codes that capture typical system defects and streamline the assessment process. Agencies then typically perform a comprehensive review of the videos, still images, and any additional data available to identify and prioritize the necessary improvements based on the assessed risk of the defects and their location within the overall collection system. Performing CCTV inspections of the entire system over a 3-5 year period would establish a solid baseline from which accurate cost projections could be completed. The primary focus of the CCTV inspection and assessment program should be on the older pipelines. With the results of the CCTV inspections, the City will continue to develop a comprehensive list of potential improvement projects. Consequently, recommendations for improvements based on the noted defects will assist in optimizing the expenditures for the wastewater collection system by targeting available funds to the pipelines that require attention with the most cost effective improvement method. In the meantime, repair and rehabilitation projects should continue to be implemented as system deficiencies and defects are identified. Additionally, the City should continue its efforts towards implementing its manhole rehabilitation program as City crews identify and prioritize the manholes that require rehabilitation. As part of the program, the City should evaluate the condition of the manholes to determine which would warrant the installation of watertight seals to eliminate and/or reduce the potential for infiltration/inflow into manholes that are otherwise structurally sound. 6.5 Recommended CIP The CIP projects identify facilities needed to meet existing system needs based on Poway’s design criteria for the sanitary sewer system. As previously discussed, the CIP projects are presented in four major phases of work based on priority needs. The total CIP costs including Phase 1 through 4 are estimated to be $9.15 million. These costs are summarized by phase in Table 6-3. Proposed Capital Improvement Projects 6-9 City of Poway Sanitary Sewer Master Plan February 2013 Table 6-3 Poway Capital Improvement Projects CIP # Type Project Description Units Base Unit Cost Scaling Factor Description Cost Priority Phased Cost I II III IV Capacity CAP-01 Pipeline Martincoit Road Sewer Pipeline Replacement Project, between Espola Road and Camino del Valle. Receives flow from San Diego PO-6 (25% of total average flow). Replace approximately 1,870 feet of existing 8- inch with 12-inch diameter pipeline and 2,970 feet of 10-inch and 12-inch with 15 inch diameter. 4,840 LF $317/LF 1.5 The scaling factor was taken at 1.5 to account for construction through canyon/potentially sensitive area. $2,300,000 1 $2,300,000 $0 $0 $0 CAP-02 Pipeline Ash Hollow Crossing Road Sewer Pipeline Replacement Project, between Butterfield Trail and Stone Ridge County Club. Replace approximately 3,800 feet of existing 8- inch diameter with 15-inch diameter. 3,800 LF $340/LF 1.0 No comment $1,292,000 1 $1,292,000 $0 $0 $0 CAP-03 Pipeline Poway Road Sewer Pipeline Replacement Project, between Pomerado Road and Oak Knoll Road. Replace approximately 1,590 feet of existing 21-inch diameter with 27-inch diameter. 1,590 LF $610/LF 1.00 $970,000 2 $0 $970,000 $0 $0 CAP-04 Pipeline Sagewood Drive Sewer Pipeline Replacement Project, between Orchard Bend Road and Martincoit Road. Replace approximately 1,860 feet of existing 8- inch diameter with 12-inch diameter. 1,860 LF $280/LF 1.00 $521,000 2 $0 $521,000 $0 $0 CAP-05 Pipeline Rios Road Sewer Pipeline Replacement Project, influent line to Camino del Valle LS. Replace approximately 2,750 feet of existing 12-inch diameter with 15-inch diameter. 2,750 LF $340/LF 1.5 The scaling factor was taken at 1.5 to account for coordination in replacing an influent LS pipeline. $1,403,000 3 $0 $0 $1,403,000 $0 CAP-06 Pipeline Powers Road Sewer Pipeline Replacement Project, between Tassel Road and McFeron Road. Replace approximately 1,330 feet of existing 12-inch diameter with 15-inch diameter. 1,330 LF $340/LF 1.0 The base unit cost was taken as a weighted average between the proposed diameters. $452,000 3 $0 $0 $452,000 $0 CAP-07 Pipeline Bowron Road Sewer Pipeline Replacement Project, south of Poway Road Replace approximately 720 feet of existing 18- inch diameter with 21-inch diameter. 720 LF $530/LF 1.0 $382,000 4 $0 $0 $0 $382,000 CAP-08 Pipeline Community Road Sewer Pipeline Replacement Project, between Hilleary Place and Poway Road. Replace approximately 1,300 feet of existing 15-inch diameter with 18-inch diameter. 1,300 LF $450/LF 1.5 The scaling factor was taken at 1.5 to account for mobilization costs and traffic control for Community Road. $878,000 4 $0 $0 $0 $878,000 CAP-09 Pipeline Neddick Avenue Sewer Pipeline Replacement Project, west of Kennebunk Street. Replace approximately 370 feet of existing 8- inch diameter with 10-inch diameter. 370 LF $230/LF 1.0 $85,000 4 $0 $0 $0 $85,000 CAP-10 Lift Station Old Coach(LS-1) Lift Station Upgrades Upgrade existing pumps for a total pumping capacity of 660 gpm. Upgrade existing emergency generator to a Tier 3 or 4 emergency generator. 660 GPM $1000/GPM 1.0 $660,000 1 $660,000 $0 $0 $0 CAP-11 Lift Station Camino del Valle (LS-3) Lift Station Upgrades Purchase additional standby pump with 565 gpm pumping capacity in the event one duty pump is out of service during peak wet weather events. 565 GPM $80/GPM 1.0 $45,000 2 $0 $45,000 $0 $0 Operations & Maintenance OM-01 Siphon Oak Knoll Road Siphon Upgrades Conduct additional gas monitoring. Construct air jumper along Oak Knoll Siphon. 800 LF $200/LF 1.0 $160,000 1 $160,000 $0 $0 $0 Condition CON-01 Rehabilitate pipelines based on condition. After completion of CCTV assessment, identify pipelines for rehabilitation. TBD TBD 1.0 TBD CON-02 Rehabilitate manholes based on condition. After completion of field investigation, identify manholes for rehabilitation. TBD TBD 1.0 TBD TOTAL $9,148,000 $4,412,000 $1,536,000 $1,855,000 $1,345,000 CITY OF POWAY MONITORING, MEASUREMENT, AND PROGRAM MODIFICATIONS City of Poway SSMP 1 Section 9.0 Monitoring, Measurement and Program Modifications Sanitary Sewer Management Plan (SSMP) Section 9.0 System Monitoring, Measurement, and Program Modifications The Public Works Wastewater Collection Division strives towards proper maintenance, operations and management of the sanitary sewer collection system. Efforts focus on reducing SSO frequency impacts, improving collection system reliability, and providing capacity in the system to convey peak flows. The following information refers to what data is collected on a daily basis and how that data is used to analyze sewer collection system performance, structure and maintenance related problems, crew productivity, and overall success of maintenance and capital improvement programs. Data Collection Poway uses CartéGraph OMS software, which provides the means to capture, retrieve, and track all collection system maintenance activities. Work order, tasks and reports are created for data entry specific to Poway’s collection system. Staff is trained on the use of this program. Staff utilizes the Asset module of the program providing information of daily activities. The information includes location of work, scope of work, activity, emergency response, or preventative maintenance. We utilize the software program to update information associated with inspections, manhole structure, pipe length, and pipe condition. This information, along with information from GraniteNet our video inspection program, gives us the ability to perform an assessment of the collection system to plan maintenance projects and future capital improvement projects. Public Sewer System SSO Data and Trends Table 1 - Gravity Sewer, Lift Station, and Force Main SSOs by Calendar Year Calendar Year Gravity Main Sewer SSOs Lift Station SSOs Force Main SSOs Public Cleanout SSOs Total SSOS 2019 0 0 0 1 1 2018 0 0 0 10 10 2017 1 0 0 3 4 2016 1 0 0 4 5 2015 2 0 0 3 5 City of Poway SSMP 2 Section 9.0 Monitoring, Measurement and Program Modifications Table 2 - SSOs by Cause, 2015 through 2019 Calendar Year Roots Debris FOG Paper/Rags Capacity Related Vandalism Pipe Failure Other 2019 0 0 0 1 0 0 0 0 2018 7 0 2 1 0 0 0 0 2017 2 0 0 1 0 0 0 1 2016 3 0 1 0 0 0 0 1 2015 4 0 0 0 0 0 1 0 Table 3 - Current year Totals for Public Sewer SSOs 0 2 4 6 8 10 12 2019 2018 2017 2016 2015 FIGURE 1 -SSO TRENDS, 2015 -2019 Gravity Main Lift Stations Force Main Public Cleanouts 0 1 2 3 4 5 6 7 8 Roots Debris FOG Paper/Rags Capacity Related Vandalism Pipe Failure Other FIGURE 2 -SSOs BY CAUSE 2015 -2019 2019 2018 2017 2016 2015 City of Poway SSMP 3 Section 9.0 Monitoring, Measurement and Program Modifications Calendar Year Total Volume SSOs, gallons Portion Contained and Returned to Sewers % Total Volume to Reach Land Total Volume Entering Surface Water, gallons 2019 3 0% 3 0 2018 2,072 27% 1,505 2 2017 5,960 0% 4 5,960 2016 301 38% 200 12 2015 3,534 84% 48 3,445 0 1000 2000 3000 4000 5000 6000 7000 2019 2018 2017 2016 2015 FIGURE 3 -TREND IN PUBLIC SEWER OVERFLOWS, VOLUME REACHING LAND/SURFACE WATER AND VOLUME RECOVERED Total Volume SSOs, gallons Portion Contained and Returned to Sewers % Total Volume to Reach Land Total Volume Entering Surface Water, gallons 0 2 4 6 8 10 12 2014.5 2015 2015.5 2016 2016.5 2017 2017.5 2018 2018.5 2019 2019.5 FIGURE 4 -ANNUAL TREND OF SEWER SYSTEM OVERFLOWS City of Poway SSMP 4 Section 9.0 Monitoring, Measurement and Program Modifications SSMP Monitoring Performance Indicators, by SSMP Element SSMP Element Summary of Element Purpose Performance Indicators for Tracking Effectiveness Goals Establish priorities for City and provide focus for City staff Annual review of goals based upon results of performance evaluations. Organization Document organization of City staff and chain of command/communication for SSO response Review of Organization Chart and all contact information making any changes identified. Legal Authority Ensure the City has sufficient legal authority to properly maintain and protect the integrity of the system Annual review of codes and/or ordinances for revisions, including schedule for identified updates. Operations and Maintenance Program Minimize blockages and SSOs by properly operating and maintaining the system • Total number and volume of SSOs • Number of repeat SSOs (from same location as any previous SSO) • Number of public lateral SSOs • Number of private lateral SSOs • Number of mainline SSOs • Total volume of spilled • Total amount recovered • Total amount estimated to reach land (saturate into soil) • Total amount estimated to reach surface waters • Number of pipe failures City of Poway SSMP 5 Section 9.0 Monitoring, Measurement and Program Modifications SSMP Monitoring Performance Indicators, by SSMP Element SSMP Element Summary of Element Purpose Performance Indicators for Tracking Effectiveness • Total length of pipe cleaned • Total length of pipe inspected (CCTV) • Total length of pipe repaired or replaced Design & Construction Standards Ensure new facilities are properly designed and constructed Annual review of new technologies and materials for collection systems assets. Overflow Emergency Response Plan (OERP) Provide timely and effective response to SSO emergencies and comply with regulatory reporting requirements • Average response time from call to arrival • Average response time from arrival to SSO stoppage and cleanup • Percent of total SSO volume contained or returned to sewer system Fats, Oils & Grease (FOG) Control Minimize blockages and overflows due to FOG • Number of blockages due to FOG • Number of SSOs due to FOG • Number of FOG- producing facilities inspected Monitoring, Measurement, & Program Modifications Evaluate effectiveness of SSMP, keep SSMP up-to-date, and identify necessary changes to SSMP Elements • Prepare and update performance results in Elements 4, 6 & 7 • Review and update field reporting forms as needed • Conduct annual review of CIWQS data City of Poway SSMP 6 Section 9.0 Monitoring, Measurement and Program Modifications SSMP Monitoring Performance Indicators, by SSMP Element SSMP Element Summary of Element Purpose Performance Indicators for Tracking Effectiveness Program Audits Formally perform an SSMP effectiveness, limitations, and necessary changes every two years as required Date of completion of last audit Communication Plan Communicate with the public Place audit on City website CITY OF POWAY SSMP PROGRAM AUDITS City of Poway SSMP 1 Section 10 SSMP Program Audits Sanitary Sewer Management Plan (SSMP) Section 10 SSMP Program Audits The SSS WDR requires a periodic internal SSMP audit at least every (2) years starting from the original date of adoption of the SSMP by Enrollee’s governing board. The Enrollee must prepare an audit report focusing on evaluating the effectiveness of the SSMP and compliance with the SSMP requirements. Once the audit report is complete, the Enrollee must prepare an audit report and keep on file for a minimum of (5) years to be made available to SWRCB or RWQCB staff upon request. Audits and updates associated with the 2019 SSMP update is as follows: 1st Audit – June 2021 2nd Audit – June 2023 5-year update – June 2024 CITY OF POWAY COMMUNICATION PROGRAM City of Poway SSMP 1 Section 11.0 Communication Program City of Poway Sewer System Management Plan Section 11.0 Communication Program Developed over many years and originally implemented fully in May 2009, the City of Poway’s SSMP is a management plan for the operation, emergency response, capital program to reduce and eliminate wastewater spills to the environment, and communications program to invite participation by our customers. The City uses several modes to communicate with the public: • City wastewater staff routinely perform customer service calls, meeting with customers in the field and educating them on City policies and practices related to sewer lateral maintenance and repair responsibilities, related operational procedures, and SSO reporting requirements. • Through the City’s website, customers can review the SSMP, learn about fat-free sewers, the City’s FOG program, sewer lateral services, and smoke testing. Customers are able to directly contact the City’s Wastewater Utilities Supervisor or Assistant Director of Public Works for Utilities concerning input to the SSMP. • Poway Today is a quarterly newsletter sent to Poway homes and businesses. The wastewater division will utilize the newsletter at times to educate the public on O&M activities associated with the wastewater collection system. Social Media such as Facebook and Twitter are also utilized as a public outreach tool to educate and notify the public associated with real time emergencies and lane closures associated with wastewater activities. • The City’s FOG program reaches out to commercial restaurants and commercial kitchens and is a proactive, cooperative relationship with local restaurants to keep Fats, Oil, and Grease (FOG) out of the sewer system and prevent spills. In Fiscal Year 18-19, the City completed meetings with 57 FOG customers and issued permits and anticipates 30 permits will be issued by December 31, 2019. • Council meetings provide a forum for direct customer comment to members of the Council. Comments can be received during public oral communication with Council, during Council workshops, and during capital and developer project presentations. The City is active and regularly communicates with agencies tributary to the City by participating in the Metropolitan Joint Powers Authority (JPA). This represents 12 public agencies whose sewage goes to the City of San Diego for processing as recycled water or treated at San Diego’s Point Loma wastewater treatment plant. Poway participates at the Metro TAC committee to provide technical expertise to the JPA. In addition, one elected official from the Council sits on the JPA, which is the governing body. Meetings for both Metro TAC and the METRO JPA occur monthly. City of Poway SSMP 2 Section 11.0 Communication Program An important piece of our communication plan for agencies tributary to the City is communication during wastewater emergencies. The following are important contacts in the City of San Diego during such emergencies: • Station 38 (Emergency Dispatch Center, 06:00 – 23:00), 619-515-3525 • Fire Dispatch (23:00 – 06:00), 858-974-0275 • COMC (Central Operations Management Center staffed 24/7 for SPS and Flow Meter Alarms), 858-614-4551 • Field Supervisor Mike Bedard: Work 858-654-4154, Mobile 619-980-8609 Below is a listing of websites where customers and agencies tributary to the City of Poway can access important information about wastewater operations in San Diego County: City of Poway: http://www.poway.org/Index.aspx?page=327 Metropolitan Joint Powers Authority: http://www.metrojpa.org City of San Diego Wastewater Department: http://www.sandiego.gov/mwwd