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DAMES &. MOORE, A PROFESSIONAL LIMITED PARTNERSHIP <br /> Pacific Gas&.Elec nc Co.- <br /> Page <br /> o:Page 5 <br /> PETROLEUM HYDROCARBONS IN SOIL <br /> Concentration are expressed in parts per million (ppm) <br /> Sample I.D. Benzene` Toluene -Ethylbenzene Xylenes TPH Gas Ttl. Lead <br /> Sample 1 n/d, n/dn/d n/d n/d n/d <br /> Sample 2 n/d 0.031 " n/d 0.047 n/dr n/d, <br /> Sample 3 n/d n/d n/d. :. 0.019 n/d n/d <br /> i , LEGEND: <br /> non-detected TPH/Gas Total Petroleum Hydrocarbons as referenced to <br /> gasoline . Ttl. - `Total <br /> For more detailed information regarding the-results of chemical analyses;please refer to the certified analytical <br /> reports included at the end of the text. .. <br /> i <br /> DISCUSSION <br /> Soil samples were obtained at themaximum depth of overexcavation in the tank removal pit area at depths of <br /> approximately 22,28 and 32 feet belowahe ground surface.Excavation of the soil in the tank removal excavation <br /> i <br /> bottom was.guidedby Harlan Knoll of the SJCEHD.The limits sampled report no detectable presence of lead in excess <br /> of 5 ppm or TPH in excess of 1 ppm.The detected concentrations of lighter,compounds was limited to a,presence of <br /> toluene,and xylenes in two of the three samples;tested,:and at concentrations below 0.05 ppm. : <br /> Review of the State of California WU T Manual and the SJCEHD UGST Worksheet for Site Closure Evaluation rank the <br /> site conditions and results of chemical analyses meeting the criteria for closure.Additionally,a domestic water <br /> well previously situate in excess'of the tank removal area was abandoned in accordance with the SJCEHD criteria.A <br /> copy of the well abandonment permit is attached"at the end of the text. <br /> " <br /> PG&E Stockton Service Center <br /> j 00160-290-042 <br /> 1 <br /> f <br /> i <br />