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4640 E. Woodward Avenue <br /> d. Addendum to Revised Soil Suitability and Nitrate Loading Study <br /> Prepared by Kleinfelder, Inc. July 13,2006 <br /> 2.0 INTRODUCTION <br /> Use Permit Application No. PA-0800206 was submitted to San Joaquin County <br /> ty <br /> Development Department (SJC CDD), to allow the use of 4640 E. Woodward Avenue lin <br /> Manteca to be changed from residential to religious assembly. SJC CDD reviewed the <br /> application and on December 28, 2004 issued Conditions of Approval for or PA-0800206. <br /> A Revised Soil Suitability and Nitrate Loading Study was prepared by Kleinfelder, Inc. dated <br /> f July 13, 2006. It is GTI's understanding that this study was prepared in anticipation of <br /> construction of a Proposed Sikh Temple, but the proposed improvements were not <br /> constructed. The nitrate loading study includes percolation testing in the vicinity of the <br /> proposed septic leach field. Improvements at 4640 E. Woodward Avenue since that time <br /> have included construction of a game room in colij . cti0ft-with the existing residence, a <br /> E � .,. <br /> J parking lot, and septic system consisting of two�eac� -2,000 gallon se <br /> leach field. tic tanks and a septic <br /> In order to allow the proposed use change, San Joaquin County Environmental Health <br /> . Department (SJC EHD re <br /> ) is requiring g that the Nitrate Loading Study be updated to reflect the <br /> proposed occupancy, and that a percolation test be performed in the vicinity of the existing <br /> septic leach field. The existing septic system was constructed in an area other than what was <br /> proposed in 2006-a1��ore the colation tests conducted in 2006 were located in an <br /> area that is an 100 feet from the xisting leach field. <br /> GTI was retained y 1VIr. irinder Singh to address Environmental Health Department <br /> Condition 3. a., which includes performing a percolation test per SJC EHD Standard <br /> Procedures and oversight, and providing an addendum to the Revised Soil Suitability and <br /> ' Nitrate Loading Study, <br /> 3.0 PERCOLATION TESTING ACTIVITIES AND RESULTS <br /> 3.1 Purpose of Investigation <br /> i <br /> The purpose of the percolation testing was to collect additional data in order to evaluate the percolation rate of the soil in the vicinity of the existing septic leach field. <br /> i <br /> 3.2 Summary of Activities <br /> GTI obtained an over-the-counter permit from SJC EHD for the advancement of two <br /> percolation test boreholes on June / <br /> 6, 2011 (Appendix A). On June 7, 2011, GTI staff <br /> mobilized on site and advanced two each four-inch diameter boreholes to a depth of 42- <br /> inches below ground surface in the location shown on Figure 2. In accordance with SJC <br /> EHD Percolation Test Procedure (Appendix A), GTI staff scored the sides to remove any <br /> smeared soil surfaces, removed loose material from the holes, and applied 2 inches of coarse <br /> i sand. The test holes were pre-soaked by adding water a minimum of 12 inches over the <br /> ► Geological Technics Inc. 2 <br /> 16232 Nitrate Loading Addendum.docx <br />