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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord California 94520 <br /> (510) 686 9600 • FAX (510) 686 9689 <br /> Afton Geoscience Client Project ID Mobil 010-NP4/30-0140-02 Sampled Mar 25, 1992 <br /> 5870 Stoneridge Rd , Sufte 6 Matra Descript Water Received Mar 26, 1992 <br /> Pleasanton, CA 94588 Analysis Method EPA 5030/8015/8020 Analyzed Mar 27, 1992 <br /> Attention Stephan Rosen First Sample # 203-1194 Reported Apr 2, 1992 <br /> TOTAL PETROLEUM FUEL HYDROCARBONS with BTEX DISTINCTION (EPA 8015/8020) <br /> Sample Sample Low/Medium B P. Ethyl <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes <br /> ug/L lig/L Pg/L Ng/L YS/L <br /> (ppb) (ppb) (ppb) (ppb) (ppb) <br /> 203-1194 MWS 550 75 033 40 32 <br /> 203-1195 AMM 97 43 N D 74 61 <br /> Detection Limits. 30 030 030 030 030 <br /> Low to Medium Boil4ng Point Hydrocarbons are quantitated against a gasoline standard <br /> Analytes reported as N D were not present above the stated lima of detecbon <br /> SEQUOIA ANALYTICAL <br /> colt A leffo <br /> Project Manager 2031 X83-ALG <3> <br />