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[4] Continued. San Joaquin County regulations require a minimum tank size of 1200 gallons. Seating is proposed at 500 ; therefore, a factor of 10 gallons per person yields a needed holding tank capacity of 6200 gallons. Three, 2000 gallon size septic tanks may be utilized. Since the soil contains a high degree of clay, a soil factor of . 250 translates to 1562 linear feet of needed leach line for the septic system. There should be eight, 100 ft leach lines. With the use of a diverter valve, four leach lines may be used at one time, then effluent periodically switched to the other four leach lines. There should be 48 inch I. D. seepage pits at the end of each leach line. This calculates to be a 13 , 000 square foot leach field area. The should be additional area for leach field expansion, if needed. [5] LOCAL SURFACE WATER AND GROUNDWATER INFORMATION Maps produced by the San Joaquin County Flood Control and Water Conservation District were reviewed for data on groundwater depth and directional flow under the subject property. This map illustrates the "Lines of Equal Depth of Water in Wells" during the Spring of 1991. According to well depth measurements, the static water level is located at approximately 60 feet below the subject site. An exploratory test hole drilled to a depth of 25 feet revealed no indication of saturated soil . The regional groundwater directional flow appears to be in an easterly direction, although many factors can influence a local directional flow, such as irrigation pumping. The Pixley Slough traverses in a southwesterly direction and is located approximately 900 feet to the south of the proposed Church site. This is the closest body of surface water to the subject site. It is extremely unlikely that effluent from the Church's septic system could adversely impact this surface water, due to the distance involved. 3 iality l control Inspection