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Sequoia 680 Chesapeake Drive 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 /> %&V Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(9 16)921 0100 <br /> MPDS Services Client Project ID Unocal#6981 4707 Pacific Ave Stockton Sampled Jul 24, 1996 <br /> 2401 Stanwell Dr , Ste 300 Matrix Descript Water Received Jul 25, 1996 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Aug 7, 1996 <br /> Attention Jarrel Crider First Sample# 607-1861 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Purgeable Ethyl Total <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes MTBE <br /> Mg/L ug/L NJ/L Ng/L pg/L pg/L <br /> 607-1861 MW1 ND ND ND ND ND ND <br /> 607-1862 MW2 1,300 470 110 16 75 36 <br /> 607-1863 MW4 ND ND ND ND ND 60 <br /> I <br /> 607-1864 MW5 ND ND ND ND ND 69 <br /> 607-1865 MW6 ND ND ND ND ND ND <br /> 607-1866 MW7 ND ND ND ND ND 86 <br /> 607-1867 MW8 ND ND ND ND ND ND <br /> 607-1868 MW9 ND ND ND ND ND ND <br /> 607-1869 MW11 ND ND ND ND ND ND <br /> Detection Limits 50 050 0 50 0.50 050 5 0 <br /> Total Purgeable Petroleum Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as ND were not present above the stated Amit of detection <br />.SEQUOIA ANALYTICAL, #1271 <br /> Signature on File <br /> Alan B Kemp <br /> Project Manager Page 1 of 2 <br /> 6071861 MPD <1> <br />