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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> WAV-VVe'� (Walnut Creek) Client Project 1D #1572 01, Stockton Sampled " 'Jun'3, 1992 <br /> 1777 Botelho Dr, Suite 260 Matrix Descript Water Received Jun 3, 1992 <br /> Walnut Creek, CA 94596 Analysis Method EPA 5030/8015/8020 Analyzed Jun 4, 1992 <br /> Attention Bruce Pfaff First Sample# 206-0096 Reported Jun 19, 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 pg/L ug/L pg/L ug/L <br /> (ppb) (ppb) (ppb) (ppb) (ppb) <br /> 206-0096 MW-5 4,700 1,400 260 360 710 <br /> 206-0098 MW-2A 960 17 37 33 33 <br /> • <br /> Detection Limits 300 3.0 30 30 3.0 <br /> Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard <br /> Analytes reported as N a were not present above the stated lima of detection Because matrix effects and/or other factors <br /> required additional sample dilutlon,detection limits for this sample have been raises! <br /> OEQUOIA ANALYTICAL <br /> Scott C ieffo 2060092 ERM <2> <br /> Project Manager /// <br />