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ID 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 /> qW Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 921 0100 <br />*PDS Services Client Project ID Unocal#5098 5606 Pacific Ave,Stockton Sampled Sep 17, 1996 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descrlpt Water Received Sep 17, 1996 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Oct 11, 1996 <br /> Attention Jarrell Crider First Sample# 609-1455 <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 pg/L pg/1- <br /> 609-1455 <br /> g/L609-1455 MW-10 ND ND ND ND ND <br /> 609-1456 MW-11 36,000 8,300 4,500 1,100 5,600 <br /> 609-1457 MW-12 2,700 200 43 130 150 <br /> 609-1458 MW-13 ND ND ND ND ND <br /> 609-1459 MW-14 ND ND ND ND ND <br /> 609-1460 MW-15 ND ND 1 5 ND 11 <br /> 609-1461 MW-16 ND 1 7 ND ND ND <br /> 609-1462 MW-17 ND ND ND ND ND <br /> 609-1463 ES-1 ND ND ND ND ND <br /> 609-1464 ES-2 ND ND ND ND ND <br /> 609-1465 ES-3 ND ND ND ND ND <br /> Detection Limits 50 050 050 060 050 <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 /> anature on File <br /> Alan B Kemp <br /> Project Manager Page 1 of 2 <br /> 6091455 MPD <1:, <br />