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Goehring Property Page 3 of 10 <br /> Our Project Number: E07182A <br /> November 30, 2007 <br /> 3.5 Septic Permit History in the Vicinity <br /> Based on file review at the EHD, the septic systems in the area appear to utilize leach lines with <br /> seepage pits. <br /> 3.6 Septic Repair Permit History in the Vicinity <br /> Based on file review at the EHD, the repairs for the septic systems in the area appear to be for <br /> the addition of leach lines and seepage pits. <br /> 3.7 Expected On-Site Maximum Septic Tank Usage <br /> Maximum expected usage on each proposed parcel would be for a primary residence and <br /> second dwelling unit. Septic system design should be based on the On-Site Wastewater <br /> Disposal Standards or other engineering recommendations. <br /> 4.0 GROUND WATER INFORMATION <br /> 4.1 Ground Water Depth and Gradient <br /> The San Joaquin County Public Works Department, Water Resources Division (Fall 2003 and <br /> Spring 2004) ground water elevation maps were reviewed to determine the ground water levels <br /> near the Site. The Fall 2003 and Spring 2004 maps are the most current official maps available <br /> from the County. According to these maps (Plates 5 & 6), ground water lies between between <br /> an elevation of 20 and 30 feet below sea level and flows at a gradient of about 10 feet per mile <br /> to the southwest in the vicinity of the Site. <br /> Table 1. <br /> Ground Water Summary <br /> Site Topographic Elevation Ground Water Elevation Estimated Depth <br /> (ft. above sea level) (ft. below sea level) to Ground Water(ft. bgs) <br /> Fall 2003: 20- 30' <br /> 175 200' 195'- 230' <br /> Spring 2004: 20- 30' <br /> No ground water was encountered by the staff of Neil 0. Anderson & Associates, Inc. during <br /> the drilling to a maximum depth of 25 feet on November 16, 2007. <br /> 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 /> 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 ©2007 Neil O.Anderson&Associates,Inc <br />