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SEQUOIA ANALYTICAL 1*h1 lo <br /> 1900 Sates Avenue Suite LM e Concord California 94520 ,0 � <br /> (510) 686-9600 FAX (510) 686 9689 <br /> ton Geosc,ence Client Project ID Mobil #04-NP4/ 30-0140-02 Sampled May 13, 1992 <br /> 5870 Stoneridge Drive, Suite 6 Matrix Descrlpt Water Received May 13, 1992 r <br /> Pleasanton. CA 94588 Analysis Method EPA 5030/8015/8020 Analyzed Apr 13, 1992' <br /> Attention Cyril Yong First Sample 205-0573 Reported May 14, 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 pg/L lJ9/L ug/L pg/L <br /> (ppb) (ppb) (Ppb) (ppb) (ppb) <br /> 205-0573 160 1 1 060 N D 20 <br /> 205-0574 A-1 44 N D N D N D N D <br /> 205-0575 E-1 53 N D N D N D N D <br /> Detection Limits: 30 030 0 30 030 030 <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 <br /> SEQUOIA ANALYTICAL <br /> Scott A Chleffo <br /> Project Manager 20,5C573 4LT <1> <br />