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Depalma Property Page 3 of 12 <br /> Our Project Number: LGS080003 <br /> January 31, 2008 <br /> 3.6 Septic Repair Permit History in the Vicinity <br /> Based on a recent file review at the EHD, the septic repair permits in the vicinity appear to be <br /> for the addition of leach lines. <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 Flood Control and Water Conservation District (2003-_and 2004)ground <br /> water elevation maps were reviewed to determine the ground water levet near the Site. The <br /> Fall 2003 and Spring 2004 maps are the most current official maps available from the County. <br /> According to these maps (Plates 3 and 4), ground water lies between 40 and 70 feet below <br /> ground surface and flows to the northwest in the in the vicinity of the Site. <br /> No ground water was encountered by the staff of Neil O. Anderson & Associates, Inc. during <br /> the drilling to a depth of 3.5 feet on January 28, 2008. <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—shou be considered potential ground-water contamination sources. <br /> 4.3 Water Sample Location <br /> Two domestic wells exist on the site. Several permits were found during file review at EHD <br /> during a recent;file review. These permits are included in the appendix of this report. <br /> A water_satnple was taken from the domestic well from the southern residence on site. The <br /> locate no of the well is indicated on the site map included in the appendix of this report. <br /> 4.4 Water Sample Constituents <br /> The water sample was analyzed for nitrate and DBCP. The results of these analyses are <br /> forthcoming. <br /> '-.44 <br /> 902 Industrial Way•Lodi,CA 95240•209.367.3701 -Fax 209.369.4228 ©2008 Neil O.Anderson&Associates,Inc <br />