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n Ms . Casey Foley January 2 , 1991 Page 4 Sample 5-8 . 5-1 was tested for total extractable petroleum hydrocarbons (modified Invironmental Protection Agency (EPA) Method 8015, extraction- by EPA Method 3550) ; for benzene, toluene, ethylbenzen , and total xylene isomers (BTEX) (EPA Method 8020) ; for organochlorine pesticides and polychlorinated biphenyls (PCB) ( PA Method 8080) ; for organic lead using methods recommended by the California Department: of Health Services (DH ) , - and the heavy metals cadmium, chromium, lead, and zinc (using atomic adsorption techniques) . Samples 5-13-2, S-15-3 , and 5-2-4 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. , indicate that there were detectable levels of contamination is soil samples below the locations of the former storage tanks and lines . ljow levels of TPHg were detected in samples 5-8 . 5-1 (2 . 3 pm) and 5-13-2 (1. 1 ppm) ; 0 . 4 ppm xylene was detected in S-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 acceptable levels thought to represent background, uncontaminated concentrations , based on our experience. Copies of the laboratory records of the analyses are , attached. ROGER FOOTT ASSOCIATES, INC.