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Cotta Property,Site 4 Page 3 of 10 <br /> Our Project Number: LGS080515 <br /> May 30, 2008 <br /> 3.5 Septic Permit History in the Vicinity <br /> Based on a recent file review at EHD, the septic systems in the area appear to utilize leach lines <br /> and filter beds. The septic permits have been attached to this report as Appendix D. <br /> 3.6 Septic Repair Permit History in the Vicinity <br /> Based on a recent file review at the EHD, the septic repairs in the vicinity appear to be for the <br /> addition of leach lines. The septic repair permits can be found at the end of this report. <br /> 13.7 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 /> i4.0 GROUNDWATER INFORMATION <br /> ✓4.1 Groundwater Depth and Gradient <br /> As previously mentioned the elevation of the Site lies between approximately 0 and 5 feet <br /> above mean sea level. The San Joaquin County Flood Control and Water Conservation District <br /> (2003 & 2004) groundwater elevation maps were reviewed to determine the groundwater 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 3 and 4), groundwater elevation lies near <br /> mean sea level, and no definite comments as to depth or gradient flow direction can be made. <br /> A groundwater boring was drilled on May 13, 2008. Groundwater was encountered at five and a <br /> half (5.5) feet. <br /> 4.2 Potential Groundwater Contamination Issues <br /> Identifying potential groundwater contamination sources was not part of the scope of work for <br /> the soil suitability study. Potential groundwater 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 groundwater contamination sources. <br /> 4.3 Water Sample Location <br /> One domestic well exists on the Site. No well permits were found during a recent file review at <br /> EHD. A well water sample was taken on May 14, 2008 by Jessen Welch from the domestic well <br /> on the site. <br /> 'OA <br /> 902 Industrial Way• Lodi,CA 95240• 209.367.3701 •Fax 209.369.4228 02008 Neil O.Anderson&Associates,Inc <br />