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Item 19 - Attachment A - Exhibit A - Appendix K - Sewer Report Appendix K Sewer System Analysis DEXTER WILSON ENGINEERING, INC. WATER ● WASTEWATER ● RECYCLED WATER CONSULTING ENGINEERS 2234 FARADAY AVENUE ● CARLSBAD, CA ● (760) 438-4422 SYSTEM ANALYSIS FOR THE FARM IN POWAY March 2019 DATE:FOR:SHT1OF1BY:M.G.D. C.F.S.24 2253,75053,750 672 2.86 153,725 0.15 0.24 8 1.50 0.074440 0.18000 0.27 0.1711 3.13250 Existing Offsite Units22 2019,10572,855 911 2.81 204,723 0.20 0.32 8 0.40 0.191973 0.30000 0.45 0.3428 2.0877 Units + Amenity Areas20 4072,855 911 2.50 182,138 0.18 0.28 8 1.00 0.108020 0.22000 0.33 0.2260 2.81 12 1011,82511,825 148 4.00 328,100 0.33 0.51 8 2.00 0.137593 0.24667 0.37 0.2642 4.3255 Existing Offsite Units+St. Andrews Lift Sta. (195 gpm)10 85,16016,985 212 3.96 348,061 0.35 0.54 8 1.00 0.206424 0.31333 0.47 0.3627 3.3415 Units + 9 Existing Offsite Units8611,82528,810 360 3.47 380,771 0.38 0.59 8 3.30 0.124311 0.23333 0.35 0.2450 5.4155 Existing Offsite Units 649,46038,270 478 3.07 643,089 0.64 1.00 12 0.70 0.154614 0.40000 0.40 0.2934 3.3944 Existing Offsite Units + LS-1 (170 gpm)4272,855111,125 1,389 2.38 790,078 0.79 1.22 12 1.00 0.158927 0.40000 0.40 0.2934 4.17Flow from MH 20 Min Slope Max dn/D0.40 0.47dn/D(2)Ca for Velocity(3)RemarksVELOCITY (f.p.s.)EQUIV POP.PEAKING FACTORPEAK WET WEATHER FLOW (gpd)PEAK WET WEATHER FLOW (DESIGN FLOW)REFER TO PLAN SHEET:LINE SIZE (inches)DESIGN SLOPE (%)DEPTH K'(1)dn (feet)LINE FROM TOIN-LINE FLOW (gpd)AVG DRY WEATHER FLOW (gpd)3/1/2019SEWER STUDY SUMMARYThe Farm at PowayJOB NUMBER:1069-001 Dexter Wilson Engineering, Inc.1 K' based on n = 0.0132 dn/D using K' in Brater King Table 7-143 From Brater King Table 7-4, based on dn/D\\artic\Eng\1069001\Sewer\Sewer System Analysis 2019-03-01The Farm