FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

2 . 2 SamplC analyses FSample S-8 . 5-1 was tested for total extractable petroleum hydrocarbons (modified Environmental Protection FAgency (EPA) Method 8015, extraction by EPA Method 3550) ; for benzene; toluene, ethylbenzene, and total xylene isomers F (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,---- F dsorption/F methods) . Samples S-13-2, 5-15-3, and 5-2-4 were tested for total petroleum hydrocarbons as gasoline (TPHg) (modified EPA Method 8015, extraction by EFA Method 3550) ; for BTEX (EPA Method 8020) ; and for tetraethyl lead (TEL) and ethylene dibromide (EDB) using mathods prescribed by the DHS. All analyses were performed by Mobile Chem Labs, Inc. , of Lafayette, California. Mobil Chem is certified by the DHS to perform the analyses requested. The analyses ; performed were required by the San Joaquin Local Health , ; District . P1The results of the laboratory analyses , as summarized P1 in Table 1, indicated that there were low to non-detectable Fconcentrations of contamination -n soil samples below the i locations of the former storage Danks and lines. Low concentrations of TPHg were detected in samples S-8 . 5-1 (2 . 3 t r ppm) and 5-13-2 (1 . 1 ppm) ; 0 . 4 p ,m xylene was detected in 5-8 . 5-1 . Sample 5-2-4 was found to contain 14 ppm TPHg, 1 . 2 F1 ppm benzene, 2 . 2 ppm toluene, O . A. 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 Fand which probably represent bacground, uncontaminated concentrations, based on our experience. Copies of the laboratory records of analyses are included in Appendix A. F F -3- ROGER FOOTT ASSOCIATES, INC.