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Sequoia 680 Chesapeake Drive Redwood Ciry,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 /> Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Analytical 819 Straker <br /> MPDS Services Client Project ID Unocal#0187,437 Miner Ave ,Stockton Sampled Feb 6, 1996 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Feb 6, 1996 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Feb 23, 1996 <br /> Attention Jarrel Crider First Sample# 602-0403 <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 Ng/L pg/L cg/L <br /> 602-0403 U-1 1,500 37 87 34 35 <br /> 602-0404 U-2 51 32 ND ND ND <br /> 602-0405 U-3 36,000 3,700 1,400 1,900 8,000 <br /> I <br /> 602-0406 U-4 340 ND ND ND 72 <br /> 602-0407 U-5 ND ND ND ND ND <br /> 602-0408 U-6 ND ND ND ND ND <br /> 602-0409 U-7 580 110 ND ND ND <br /> 602-0410 U-8 380 75 25 53 84 <br /> 602-0412 ES1 ND ND ND ND ND <br /> 602-0413 ES2 ND ND ND ND ND <br /> 602-0414 ES3 ND ND ND ND ND <br /> Detection Limits 50 050 650 050 050 <br /> Total Purgeable Petroleum Hydrocarbons are quantitated against afresh 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 Page 1 of 2 <br /> 6020403 MPD <I> <br /> 6D <br />