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2 . 2 Sample Analyses Sample 5-8 . 5-1 was tested for total extractable petroleum hydrocarbons (modified Environmental Protection Agency (EPA) Method 8015, extraction by EPA Method 3550) ; for benzene; toluene, ethylbenzene, and total xylene isomers (BTEX) (EPA Method 8020) ; for organochlorine pesticides and polychlorinated biphenyls (PCB) (EPA Method 8080) ; for organic lead using methods recommended by the California Department of Health Services (DHS) , and the heavy metals cadmium, chromium, lead, and zinc (using atomic adsorption methods) . Samples S-13-2 , S-15-3 , and S-2-4 were tested for total petroleum hydrocarbons as gasoline (TPHg) (modified EPA Method 8015 , extraction by EPA Method 3550) ; for BTEX (EPA Method 8020) ; and for tetraethyl lead (TEL) and ethylene dibromide (EDB) using methods prescribed by the DHS. All analyses were performed by Mobile Chem Labs, Inc. , of Lafayette, California. Mobile Chem is certified by the DHS to perform the analyses requested. The analyses performed were required by the San Joaquin Local Health District . The results of the laboratory analyses , as summarized in Table 1 , indicated that there were low to non-detectable concentrations of contamination in soil samples below the locations of the former storage tanks and lines . Low concentrations of TPHg were detected in samples 5-8 . 5-1 (2 . 3 ppm) and 5-13-2 (1 . 1 ppm) ; 0 . 4 ppm xylene was detected in 5-8 . 5-1. Sample 5-2-4 was found to contain 14 ppm TPHg, 1 . 2 ppm benzene, 2 . 2 ppm toluene, 0 . 2 ppm ethylbenzene, and 1 . 5 ppm total xylene isomers . Heavy metals were present in sample 5-8 . 5-1 at concentrations generally thought to be acceptable by the California Department of Health Services and which probably represent background, uncontaminated concentgations , based on our experience . Copies of the laboratory records of analyses are included in Appendix A. -3- ROGER FOOTT ASSOCIATES, INC.