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V. LABORATORY ANALYSES <br /> A total of 61 soil samples were forwarded to Priority Environmental Labs of Milpitas, <br /> California, a state certified analytical laboratory, for chemical analyses. Thirty-two soil <br /> samples were selected for the total petroleum hydrocarbons as diesel (TPH-d, modified EPA <br /> method 8015) analysis. Test results indicate no detectable concentrations of diesel in soil <br /> samples from boring locations B-2 through B-5. However, elevated concentrations of diesel <br /> were found in soil samples from boring locations B-1 and B-6 through B-8 at depths between 5 <br /> and 20 feet. No diesel was detected in soil samples collected from depths of 25 feet or greater <br /> — during this investigation. <br /> Results of the laboratory analyses are tabulated below. A copy of the laboratory analytical <br /> reports and chain-of-custody records are presented in Appendix B of this report. <br /> TABLE 1 . SUMMARY OF ANALYTICAL RESULTS <br /> Concentration of Total Petroleum Hydrocarbons as Diesel <br /> Sample Boring Boring Boring Boring Boring Boring Boring Boring <br /> Depth B-1 B-2 B-3 B-4 B-5 B-6 B-7 B-8 <br /> 5' 1500 N.D. N.D. N.D. N.D. 1100* 6300 <br /> 10' 62 N.D. N.D. N.D. N.D. 9.4 4000 140 <br /> 15' 19 n/a N.D. N.D. N.D. 13* 170 45 <br /> 20' N.D. N.D. n/a n/a n/a N.D. 33 18 <br /> 25' n/a n/a n/a n/a N.D. - - <br /> 30' N.D. n/a n/a n/a n/a - <br /> 35' n/a - N.D. <br /> 40' N.D. n/a <br /> 45' n/a N.D. - <br /> 50' n/a - - n/a - - <br /> Notes: <br /> 1. N.D. stands for "Not Detected" at the analytical reporting limit; <br /> n/a stands for sample "not analyzed"; - stands for no sample available for analysis. <br /> 2. Numerical values of TPH-d are in mg/Kg, equivalent to parts per million (ppm). <br /> 3. Analytical reporting limit for TPH-d in soil samples is 1 ppm. <br /> 4. * stands for sample from a different depth. The two B-6 samples were from depths of <br /> 14 and 23 feet. The B-7 sample was from 7 feet. <br /> 5 <br />