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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 1900 Bates Avenue,Suite L Concord CA 94520 (510) 686 9600 FAX(510) 686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> OPOS Services Client Project ID Unocal#6348,3788 Tracy Blvd,Tracy Sampled Sep 9, 1994 <br /> 2401 Stanwell Dr, Ste 400 Matrix Descript Water Received Sep 9, 1994 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Sep 23, 1994 <br /> Attention Avo Avedesslan First Sample# 409-0937 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Purgeable Ethyl Total <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes <br /> Ng/L µg/L Mg/L pg/L Fig/L <br /> 409-0937 MW-1 ND ND ND ND ND <br /> 409-0938 MW-2 ND ND ND ND ND <br /> 409-0939 MW-3A ND ND ND ND ND <br /> 409-0940 MW-4 ND ND ND ND ND <br /> • <br /> Detection Limits so 050 050 050 050 <br /> Total Purgeable Petroleum Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as ND were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL,1271 <br /> 161gnature on File <br /> Alan B Kemp <br /> Project Manager <br /> 4090937 M PD <1> <br />