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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord California 94520 <br /> (510) 686 9066 • FAX (510) 686-9689 <br /> Alton Geosclence Client Project ID 30-140-01 Sampled Sep 25, 1991 <br /> 1000 BurnettSt #140 Matrix Descript Water Received Sep 26, 1991 <br /> Concord ,CA 94520 Analysis Method EPA 5030/8015/8020 Analyzed Oct 2, 1991 <br /> Attention Tndib Gruha First Sample # 109-1920 Reported Oct 14, 1991 <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 /> pg/L ug/L pg/L ug/L pg/L <br /> (ppb) (ppb) (ppb) (ppb) (ppb) <br /> 109-1920 MW-6 20,000 510 19 910 340 <br /> Detection Limits- 1,500 15 15 15 15 <br /> Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard <br /> Analytes reported as N 0 were not present above the stated limit of detection Because matrix effects and/or other tactors <br /> 0required additional sample dilution,detection limits for this sample have been raised <br /> )Pr <br /> ANAL ICAL <br /> R Malerstein <br /> ect Manager 1091912.ALG 43' <br />