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Sequoia680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> IQFAnalytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 4 <br /> MPDS Services Client Project ID Unocal#0187 437 E Miner Ave Stockton Sampled Nov 5, 1996 <br /> 2401 Stanwell Dr , Ste 300 Matrix Descript Water Received Nov 6, 1996 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Nov 26, 1996 <br /> Attention Jarref Crider First Sample # 611-0523 <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 Ng/L pg/L <br /> 611-0523 U-1 380 63 ND ND 30 <br /> 611-0524 U-2 ND 062 ND ND ND <br /> 611-0525 U-3 43,000 2,400 1,000 1,600 6,300 <br /> 611-0526 U-4 190 39 ND ND ND <br /> 611-0527 U-5 ND ND ND ND ND <br /> 611-0528 U-6 ND ND ND ND ND <br /> 611-0529 U-7 130 077 12 ND 10 <br /> 611-0530 U-8 ND ND ND ND ND <br /> Detection Limits 50 050 050 0 50 050 <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 /> signature an File <br /> Alan B Kemp <br /> Project Manager Page 1 of 2 <br /> 6110523 MPD <1> <br />