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Traylor Shea Precast Page 4 of 14 <br /> Our Project Number: E071W� <br /> November 29, 2007 <br /> Table 2. <br /> (U� % <br /> Vicinity Septic System Repair Permit Summag. <br /> s <br /> Address Date Tank Comments <br /> Capacity <br /> 3732 Newton Rd. 9-30-85 1,200 Addition of(1) 40' leach line and replacement of <br /> tank at existing residential system. <br /> 3851 Newton Rd. 2-21-01 1,600 Addition of(1) 40' leach line and (1) 25'deep by <br /> 48"diameter seepage pit to existing residential <br /> system. <br /> ` 3931 Newton Rd. 3-28-02 N/A Addition of(1) 40' leach line and (2) 25'deep by <br /> 36"diameter seepage pits to existing office <br /> system. <br /> The repair permits are for the additions of leach lines and seepage pits. <br /> I.3.7 Expected On-Site Maximum Septic Tank Usage <br /> r Maximum expected usage on the Site would be for both phases of the proposed manufacturing / <br /> facility. Septic system design should be based on the On-Site Wastewater Disposal Standards l }� <br /> or other engineering recommendations. <br /> L I.4 Ground Water Information <br /> I.4.1 Ground Water Depth and Gradient <br /> The San Joaquin County Flood Control and Water Conservation District (1998 and 1999) ground <br /> water depth and elevation maps were reviewed to determine the ground water levels near the <br /> ` Site. The Fall 1998 and Spring 1999 maps are the most current official maps available from the <br /> Z.l) County. According to these maps (Plates 3-6), ground water lies between 45 and 60 feet below <br /> ground surface in the vicinity of the Site. The groundwater gradient is uncertain in the area. <br /> No ground water was encountered by the staff of Neil O. Anderson & Associates, Inc. during <br /> the drilling to a depth of 3.25 feet on November 21, 2007, <br /> I.4.2 Potential Ground Water Contamination Issues <br /> ` Identifying potential ground-water contamination sources was not part of the scope of work for <br /> the soil suitability study. Potential ground-water contamination can occur from a number of <br /> sources which often include leaky underground storage tanks, agricultural activities, dairies, <br /> septic systems, and storm water infiltration. Agricultural activities and the use of septic systems <br /> in the area should be considered potential ground-water contamination sources. <br /> L <br /> 1 '44 <br /> L. 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 02007 Nei!O.Anderson&Associates,Inc <br />