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tr <br /> 3.0 METHODOLOGIES <br /> 16 <br /> 3.1 Contaminants of Concern <br /> This investigation was primarily concerned with presence of petroleum hydrocarbons beneath the <br /> site. Accordingly, soil and groundwater samples were analyzed for: TPH-G in accordance with <br /> Environmental Protection Agency (EPA) Test Method 8015M, BTEX in accordance with EPA <br /> Test Method 8020, and fuel oxygenates tert-butanol, MTBE, DIPE, ETBE and TAME in <br /> accordance with EPA Test Method 8260. <br /> 3.2 Analytical Laboratory <br /> rATC utilized the laboratory services of Entech Analytical Labs, Inc. (Entech), of Sunnyvale, <br /> California for this project. Entech is certified in California by the Department of Health Services <br /> under the Environmental Laboratory Accreditation Program (FLAP). All soil and groundwater <br /> samples were analyzed on a 10 working day turn-around time. <br /> 3.3 Sampling Protocol <br /> The sampling protocol and methodology were based on guidance from the following: <br /> Tri-Regional Board Staff Recommendations for Preliminary Evaluation and <br /> Investigation of Underground Tank Sites, California Regional Water Quality <br /> Control Board, San Francisco Bay Region, August 10, 1991. <br /> • Test Methods for evaluating Solid Waste, SW-846, Office of Solid Waste and <br /> Emergency Response, U.S. Environmental Protection Agency. <br /> �r <br /> �r <br /> H-,\LEHRMANIQS_132 VAMPORTSWrillrpi.doc 4 ATC Associates Inc. <br /> `I 4 <br />