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Report on Subsurface Environmental Exploration (Soil Borings) Page 9 A & M Market, 4579 East Acampo Road, Acampo, California November 9, 1992 Quorum Environmental Consultants, Inc , Project 92-120-2 ' 5.0 SELECTION OF SAMPLES FOR ANALYSIS AND DESCRIPTION OF LABORATORY ANALYSES AND RESULTS i 5.1 Selection of Soil Samples for Laboratory Analysis Soil samples with any apparent hydrocarbons, whether by odors noticeable to observers or by PID readings,were selected from bonngs B-1 through B-5 for testing in the chemical laboratory These were from the 15-, 20-, or 25-foot-deep sampling intervals without exception In addition, the soil sample from the last sample interval :n each boring was ' analyzed For boring B-5, in which there were no indications of hydrocarbons in any of the samples, the samples that were selected for analysis were from the 20- and 25-foot- deep sampling intervals in which indications of hydrocarbons were present in samples ' from other borings The 25-foot-deep sample also represented the bottom of this boring (B-5) 5.2 Analytical Methods and Results ' The soil samples were submitted to the laboratory for analysis for total petroleum hydrocarbons as gasoline (TPHg)and for the hydrocarbon constituents benzene, toluene, ethylbenzene and total xylenes The test methods used were Environmental Protection Agency (EPA) Methods 5030 and TPH LUFT with 8020 for BTEX distinction Moble Chem Labs Inc of Martinez, California, which is certified by the State of California to perform the specified tests, performed the chemical analyses for TPHg and BTEX The results of the chemical analyses are presented in Table 2 The Chain-of-Custody Records and the analytical reports from the laboratory are included in Appendix D ' Results of analyses on the soil samples showed that hydrocarbons were not found within the laboratory detection limits in any of the samples analyzed from ether the borings or the stockpile