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1 KLE/NFELDER <br /> �A.yM hvpla.Piyll Selutiwm. <br /> 5 ANALYTICAL RESULTS AND DISCUSSION <br /> Three soil samples collected from each of the nine probe locations were submitted to CLS <br /> laboratories for potential analyses. A total of nine soil samples, one from each boring were <br /> analyzed for the following: <br /> • Total Petroleum Hydrocarbons as referenced to diesel (TPHd) and motor oil (TPHmo) <br /> by EPA Method 8015M <br /> • Total Petroleum Hydrocarbons as referenced to gasoline (TPHg) by EPA Method 8260M <br /> • Volatile Organic Compounds (VOCs) by EPA Method 8260B <br /> The soil samples analyzed were collected at depths ranging from 3 to 6 feet bgs and were <br /> analyzed on a standard 5-day turnaround schedule for completion. For details refer to the <br /> chain-of-custody form and analytical reports in Appendix C. <br /> The results are located on attached Table 1. TPHg and TPHd were not detected at or above <br /> laboratory reporting limits in the nine soil samples analyzed. TPHmo was detected in seven of <br /> the nine soil samples at concentrations ranging from 4.9 to 78 milligrams per kilogram (mg/kg). <br /> VOCs by EPA Method 82608 were not detected with the single exception of PCE, which was <br /> detected at 49 micrograms per kilogram (µg/kg) from probe KB-8 at a depth of 48-inches. KB-8 <br /> was located in the western alignment area in proximity to known PCE contamination associated <br /> with former Lincoln Center dry cleaning operations. <br /> The analytical results were compared to Soil Environmental Screening Levels (ESLs) developed <br /> by the California Regional Water Quality Control Board, San Francisco Bay Region, dated <br /> December 2013. <br /> ESLs were developed to assist in evaluating sites impacted by releases of hazardous <br /> chemicals. ESLs are risk assessment tools which include conservative values for commonly <br /> detected contaminants, but are not regulatory limits or cleanup standards, although regulatory <br /> agencies may and have chosen some of these values as such. The presence of a chemical at <br /> concentrations in excess of an ESL does not necessarily indicate that adverse impacts to <br /> 133385.4//ST013R0698 Page 8 of 12 January 7,2014 <br /> Copyright 2014 Kleinfelder <br />