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4D <br /> 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 (5l0)686 9689 <br /> 14W Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> MPDS Services Client Project ID Unocal#6981,4707 Pacific Ave, Stockton Sampled Oct 26-27, 1994 <br /> 2409 Stanwell Dr, Ste 400 Matrix Descript Water Received Oct 27, 1994 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Nov 10, 1994 <br /> Attention Avo Avedlsslan First Sample# 410-1833 <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 ug/L pg/L u9/L p9/L <br /> 410-1833 MW-1 68* 40 ND ND ND <br /> 410-1834 MW-2 24,000 11,000 3,100 96 3,200 <br /> 410-1835 MW-3 140 14 ND ND 11 <br /> 410-1836 MW-4 650 20 22 ND 46 <br /> 410-1837 MW-5 13,000 10,000 790 ND 270 <br /> 410-1838 MW-6 ND ND 069 ND 059 <br /> 410-1839 MW-7 3,700 1,900 11 240 ND <br /> 410-1840 MW-8 ND ND ND ND 13 <br /> 410-1841 MW-9 ND ND ND ND ND <br /> 410-1842 MW-10 ND ND ND ND ND <br /> Hydrocarbons detected did not appear to be gasoline <br /> Detection Limits 50 050 050 0 50 650 <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 /> Signature on File <br /> Alan B Kemp <br /> Project Manager <br /> 4101833 MPD <1 <br />