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Presentation by SDG&E - 1600 Pipeline Update on Pomerado RoadCity of Poway City Council Presentation Pipeline 1600 Pomerado Road Replacement Projects Project Overview October 20, 2020 © 2019 San Diego Gas & Electric Company. All trademarks belong to their respective owners. All rights reserved.Some materials used under license, with all rights reserved by licensor. PSEP Pipeline 1600 Test or Replace Projects THE SITUATION:Natural Gas Pipeline Safety Pipeline 1600 Under Construction -1949 2 3 Pipeline Safety Enhancement Plan (PSEP) Since 2012, more than 20 miles of pipe has been replaced and more than 3 miles of pipe has been strength tested as part of PSEP: Completed PSEP projects in San Diego County: ➢La Mesa: 8.6 miles replacement/.3 mile strength tested ➢Santee: 1.2 miles replacement/1.9 miles strength tested ➢El Cajon: .7 mile replacement ➢City of San Diego: ❑Mission Valley: 6.9 miles replacement/.9 mile strength tested ❑Morena Boulevard: 2.6 miles replacement ❑Pacific Highway: .3 mile replacement ➢National City: .03 mile replacement Next PSEP projects 2020-2024: ➢County of San Diego: 11.2 miles replacement/10.2 miles strength test ➢Escondido: 5.4 miles replacement/2.7 miles strength test ➢Poway: 5.2 miles replacement ➢City of San Diego: 20.8 miles replacement 4 Pipeline 1600 2020 Construction Projects 2020 Construction Projects ▪Midway Project in Escondido and the County:Project completion expected by the end of November 2020 ▪Black Mountain Project in the Mira Mesa community of the City of San Diego:Project completion expected in December 2020 ▪Serra Mesa Project in the City of San Diego:Project completion expected in early December 2020 ▪Kearny Mesa Project in the City of San Diego:Project completion expected in mid-December 2020 Next Set of Projects in 2021: ▪Bear Valley Project in Escondido, the County and San Dieguito River Park in the City of San Diego:Construction is expected to begin in October 2020 and conclude in April 2021 ▪Pomerado North Project in Rancho Bernardo and Poway:Construction is expected to begin in May 2021 and conclude in February 2022 ▪Pomerado South Project in Poway:Construction is expected to begin in August 2021 and conclude in December 2021 ▪Scripps Poway Parkway Project in the Scripps Ranch community of the City of San Diego:Construction is expected to begin in November 2021 and conclude in April 2022 6 Pomerado Road Pipeline Replacement Projects Details ▪SDG&E will install 5.2 miles of new 16 inch pipe in Pomerado Road in the City of Poway between Bernardo Heights Parkway and Scripps Poway Parkway ▪Pomerado North construction start date: May 2021 ▪Pomerado North construction completion date: February 2022 ▪Pomerado South construction start date: August 2021 ▪Pomerado South construction completion date: December 2021 ▪Typical anticipated construction hours: Monday –Friday, 8:30 a.m. to 3:30 p.m., with some weekend and night work possible ▪Construction schedule will be coordinated with Poway Unified School District to accommodate school and summer school schedules ▪SDG&E will work with City of Poway’s road repaving schedule to coordinate construction schedules ▪Traffic flow will be maintained at all times ▪During non-working hours trenches will be covered with steel plates and reopened for normal traffic flow ▪Natural gas service will be maintained for residents and businesses by either existing Line 1600 or temporary bypass pipes 7 Modern Pipeline Safety Features THE SITUATION: 8 Questions? Kevin O’Beirne kobeirne@sdge.com (858) 654-1765 Jennifer Ramp jramp@sdge.com (858) 650-6116 Joe Britton jbritton@sdge.com (858) 264-9831 Line 1600 Project Website: sdge.com/psep Line 1600 Project Toll Free #: 1-866-382-0886 9 Appendix Typical Construction Train 11 What is Pipeline Replacement? ➢Typically, the new pipeline segment is installed separate from the existing pipeline, which allows the construction work to proceed without stopping the flow of natural gas through the original pipeline. When the new replacement section is complete, the original pipeline is then removed from service ➢A trench is carefully excavated along the selected installation location, new pipe is installed and the trench is filled in and land/roads restored ➢The new pipeline segment will be constructed with new, modern safety features: ❑Thicker steel pipe with a special coating to prevent corrosion ❑Bright yellow warning mesh above pipe to prevent accidental third-party excavations ❑New fiber-optic technology that can remotely detect leaks and ground disturbances 12 What is Strength Testing? ➢Before a new pipeline is put into service, it is strength tested to ensure the integrity of the pipe; one of the common methods for assessing pipeline integrity is the hydrostatic pressure test ➢A hydrostatic pressure test utilizes water to assess the integrity of the pipeline: ❑Both ends of pipeline segment are sealed and the pipe is filled with water ❑The water pressure is increased to a point higher than the pipeline will normally operate to validate the strength of the pipeline ❑Pressure is maintained at higher level and monitored for at least 8 hours to ensure there are no leaks ❑If a leak is detected, repairs will be made and pipe segment is re-tested Regulatory/Legislative Context –Pipeline Safety •2010:PG&E natural gas pipeline in San Bruno ruptures •2011: New CA pipeline safety laws enacted (“Test or Replace”) •2014: SDG&E’s Pipeline Safety Enhancement Plan (PSEP) approved •2012-2019: More than 23 miles of natural gas pipe has been modernized as part of PSEP in San Diego County •2015: Application for Pipeline Safety & Reliability Project (PSRP) filed •2019: CPUC’s Safety & Enforcement Division approved plan to replace 37 miles in populated areas and strength test 13 miles in rural areas •2020:CPUC reaffirmed their Safety & Enforcement Division’s approved project 13