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LAURENCE TEST <br /> CIVIL ENGINEER O <br /> m <br /> SEPTIC SYSTEM DESIGN 1 172 — y <br /> (Per San Joaquin County Requirements) P. 3-31-2007 <br /> JOB NAME: ROGERS TRUCKINGCIVIL P <br /> JOB NO.: 0301 F 0 CALtFpP� <br /> DATE: 5/20/03, Rev.: 8/15/02 11/20/03 2/13/04 <br /> SEPTIC TANK SIZING <br /> 1. MINIMUM SEPTIC TANK CAPACITY <br /> BASIC TANK CAPACITY (BTC)= 1,200 GAL TANK IS EXISTING <br /> 2. SEPTIC TANK CAPACITY FOR AVERAGE DAILY FLOW (ADF) < 1500 GALLONS <br /> CALCULATED TANK CAPACITY(CTC) = 1,125 gal+ 0.75(ADF) <br /> ADF = WATER USE FACTOR FOR DEVELOPMENT TYPE TIMES NUMBER OF PERSONS <br /> OCCUPYING DEVELOPMENT <br /> DEVELOPMENT TYPE 1: DAY WORKERS, OFFICE <br /> WATER USE FACTOR: 25 GPCD <br /> NUMBER OF OCCUPANTS: 6 <br /> ADF FOR DEVELOPMENT TYPE: 150 GPD <br /> DEVELOPMENT TYPE 2: RESIDENTIAL MOBILE HOME <br /> NUMBER OF OCCUPANTS: 2 <br /> WATER USE FACTOR: 80 GPCD <br /> ADF FOR DEVELOPMENT TYPE: 160 GPD <br /> TOTAL AVERAGE DAILY FLOW 310 GPD <br /> CTC = 1358 GAL <br /> LEACH LINE SIZING <br /> I. MINIMUM LENGTH OF LEACH LINE (LL) _ (BTC+ADF) x SOIL FACTOR <br /> SOIL TYPE: I CLAY AND/OR PEAT <br /> SOIL FACTOR: 0.250 <br /> LL REQ'D 339 FT <br /> EXISTING SYSTEM <br /> EXISTING LEACH LINE 100 FT <br /> TRENCH WIDTH 1 FT <br /> DEPTH OF GRAVEL 1.5 FT <br /> EQUIVALENT LENGTH 140 FT per MSTP <br /> EXISTING PIT DIAMETER 33 IN <br /> EXISTING PIT DEPTH 25 FT <br /> PIT SURFACE AREA 11 SQFT per MSTP <br /> EQUIVALENT LENGTH 108 FT <br /> PROPOSED ADDITIONS <br /> 2/26/2004 <br />