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ID Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> [900 Bates Avenue, Suite L Concord, CA 94520 (510) 686 9600 FAX (510)686 9689 <br /> 1WAnalytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> MPDS Services Client Project ID Unocal#2859 1665 Pacific Ave,Stockton Sampled Aug 12, 1994 <br /> 2401 Stanwell Dr, Ste 400 Matrix Descript Water Received Aug 12, 1994 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Aug 30, 1994 <br /> Attention Avo Avedessian First Sample# 408-0913 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Purgeable Ethyl Total <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes <br /> pg/L pg/L pg/L Fig/L pg/L <br /> 408-0913 MW-1 ND ND ND ND ND <br /> 408-0914 MW-2 180,000 15,000 62,000 5,300 29,000 <br /> 408-0915 MW-3 760 110 11 43 59 <br /> 408-0916 MW-4 170 1 6 46 ND 68 <br /> • 408-0917 MW-5 ND ND ND ND ND <br /> 408-0918 MW-6 11,000 54 140 360 2,100 <br /> 408-0919 MW-7 ND ND ND ND ND <br /> Detection Limits 50 030 050 050 0-50 <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 /> i <br /> 0"gnature on File <br /> Alan B Kemp <br /> Project Manager <br /> 4080913 MPD <1> <br />