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j SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> prealSto,cm , ry v} " J19i <br /> 92w: gikoann ,' c + ' 6K ' f <br /> 2401 Stanwell Drive, Suite 400 Matrix Descript Water Received Jun 3, 1992 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Analyzed Jun 4, 1992 <br /> Attention Mardo Kaprealian, P E First Sample # 206-0126 Reported Jun 17, 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 /> pg/L Fig/L pg/L Ing/L yg/L <br /> (ppb) (ppb) (ppb) (ppb) (ppb) <br /> 206-0126 MW 10 980 72 20 33 86 <br /> 206-0127 MW 11 620 150 70 26 58 <br /> 206-0128 MW 12 23,000 2,300 2,000 840 1,700 <br /> 206-0129 MW 13 ND ND ND ND ND <br /> i <br /> Method Detection Limits 50 030 030 030 030 <br /> Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard <br /> OEGUOIA ANALYTICAL <br /> colt A Chieffo 2060126 KEl <1> <br /> Project Manager <br />