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4 <br /> Sequoia 680 Chesapeake Dave Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> ODS Services <br /> Client Project ID Unocal#6981,4707 Pacific Ave Stockton Sampled Jan 20-21, 97 <br /> 2401 Stanwell Or, Ste 300 Matrix Descript Water Received Jan 21, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Feb 4, 1997 <br /> Attention Jarrel Crider First Sample# 701-1160 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Purgeable Ethyl Total <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes MTBE <br /> pg/L i-i9/L Mg/L Mg/L pg/L pg/L <br /> 701-1160 MW-1 NO NO NO NO ND NO <br /> 701-1161 MW-2 250 72 13 45 16 18 <br /> 701-1162 MW-4 NO NO ND NO ND 12 <br /> 701-1163 MW-5 NO NO ND NO ND 25 ' <br /> 701-1164 MW-6 NO NO ND NO ND NO <br /> 701-1165 MW-7 NO 059 NO NO NO 20 . <br /> 701-1166 MW-8 290 43 082 ND 45 93 <br /> 701-1167 MW-9 NO NO NO NO ND ND <br /> 701-1168 MW-11 NO ND ND NO NO NO <br /> etection Limits 50 050 050 050 050 50 <br /> Total Purgeable Petroleum Hydrocarbons are quantrtated against a fresh gasoline standard <br /> Analytes reported as ND were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> ature on File <br /> Alan B Kemp <br /> Project Manager Page 1 of 2 <br /> 7011160 MPD <15 <br />