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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue Suite 8 • Sacramento CA 95834 <br /> . (916) 921-9600 s FAX (916) 9210100 <br /> Alton Geoscience Client Project ID #42-0012-00, Cal Trans Sampled Apr 6, 1992 <br /> 3035 Prospect Park Dr, Suite 80 Matrix Descript Water Received Apr 7, 1992 <br /> Rancho Cordova CA 95670 Analysis Method EPA 5030/8015/8020 Analyzed Apr 13, 1992 <br /> Attention Matthew Taylor First Sample # 204-0132 Reported Apr 14 1992 <br /> TOTAL PETROLEUM FUEL HYDROCARBONS with STEX DISTINCTION (EPA 8015/8020) <br /> Sample Sample Low/Medium B P Ethyl <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes <br /> ,ug/L N9/L Ng/L pg/L pg/L <br /> (ppb) (ppb) (Ppb) (ppb) (ppb) <br /> 204-0132 Mw 2 3,200 450 12 N D 49 <br /> 204-0133 Mw 3 2 400 260 93 N D 22 <br /> s <br /> Detection Limits 300 30 30 3 0 30 <br /> Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard <br /> Analytes reported as N Q were not present above the stated limit of detection Because matrix effects and/or other factors <br /> required additional sample dilution detection limits for this sample have been raised <br /> SEQUOIA ANALYTICAL <br /> /� <br /> Michael R Giles <br /> Laboratory Director <br /> 2040131 ALR <2> <br />