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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord California 94520 <br /> t1510) 686-9600 • FAX (510) 686-9689 <br /> -West (Walnut Creek) Client Project VD #1572 04 Sampled Apr 3, 1992 <br /> 1777 Sotelho Dr Suite 260 Matrix Descript Water Received Apr 3. 1992 <br /> Walnut Creek CA 94596 Analysis Method EPA 5030/8015/8020 Analyzed Apr 2 , 1992 <br />,Attention Bruce Plast First Sample # 204-0108 Reported Apr 22. 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 ug/L ug/L ug/L ug/L <br />' (ppb) (Ppb) (ppb) (Ppb) (ppb) <br /> 204-0108 Mw-1A 23,000 3,200 2.400 840 3,500 <br /> 1 <br /> Detection Limits 600 60 6 4 6.0 6.0 <br /> Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard <br /> Analytes reported as N D were not present above the stated limit of detection Because matnx effects and/or other factors <br />' required additional sample dilution detection limits for this sample have been raised <br /> EQUOIA ANALYTICAL. <br /> Kenneth K F Lee 2040108 ERM <t <br /> Laboratory Manager <br />