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6 RESULTS, CONCLUSIONS AND RECOMMENDATIONS <br /> <br />6.1 RESULTS <br />6.1.1 SHALLOW SOIL RESULTS <br />The eight (8) shallow soil locations were chosen to assess possible impacts to areas identified in <br />the Phase I assessment completed by Kleinfelder. The eight areas identified were: the vehicle <br />parking area (B-2), depression near the east end of the site (B-3 and B-4), two former AST areas <br />(B-5 and B-7), former tank washout area (B-1 and B-8), and the residential leach field (B-6). <br />The shallow soil samples collected from the 8 locations on the site were analyzed as detailed in <br />Section 5 of this report. Refer to Tables 2 and 2-1 for a complete listing of the analytes and <br />results. <br />The following table only outlines the detected concentrations of analytes from the shallow soil <br />borings advanced throughout the site. The following detections were made in the analysis for <br />pesticides and carbamates. <br />Select Soil Results (Shallow Soil Borings) <br />Sample <br />Location and <br />Depth <br />Analyte Concentration (mg/kg) <br />4,4-DDD 4,4-DDE 4,4-DDT DieIdrin Oryzalin <br />PRG (mg/kg) 2.4 1.7 1.7 0.03 3.1E+06 <br />B-1-1' ND<0.005 0.008 0.017 ND<0.005 .028 <br />B-2-1' ND<0.005 0.006 ND<0.005 0.008 .028 <br />B-3-1' ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.02 <br />B-4-1' ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.02 <br />B-5-1' ND<0.005 0.009 ND<0.005 ND<0.005 ND<0.02 <br />B-6-1' ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.02 <br />B-7-3' 0.028 0.21 0.39 ND<0.005 ND<0.02 <br />B-8-3' ND<0.005 0.008 0.034 ND<0.005 ND<0 02 <br />ND = Analyte not detected at or above the laboratory reporting limit. <br />There were no detected concentrations of organophosphates, fumigants, chlorinated hydrocarbons, <br />VOCs, SVOCs, THP-d, TPH-g, or chlorinated hydrocarbons, aromatic hydrocarbons in any of the <br />soil samples collected for the applicable analyses from borings B-1 through B-8. <br />All of the metals concentrations detected in each of the shallow soil samples analyzed were below <br />the PRGs with the exception of arsenic. The concentration of arsenic seen in each of the soil <br />samples exceeded the residential PRG cancer end point (0.39 mg/kg) but did not exceed the non- <br />cancer end point (22 mg/kg). Each of the soil samples collected from the shallow soil borings <br />appear to display typical background concentrations seen within California for the metals included <br />27125.E0I STO4R181 <br />Page 14 of 23 <br />© 2004 Kleinfelder, Inc. February 13, 2004 <br />KLEINFELDER 2825 East Myrtle Street, Stockton, CA 95205-4794 (209) 948-1345 (209) 948-0621 fax