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i Sequoia 680 Chesapeake Dnve 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 a 19 Sinker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> WD8 Services Client Project ID Tosco#6981 4707 Pacific Ave Stockton Sampled Jul 16-17, 97 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Jul 17, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Jul 31, 1997 <br /> Attention Jarrei Crider First Sample # 707-0934 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Purgeable Ethyl Total <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes <br /> lig/L Ng/l- Ng/L pg/L pg/L <br /> 707-0934 MW-1 ND ND ND ND ND <br /> 707-0935 MW-2 16,000 3,900 220 180 390 <br /> 707-0936 MW-4 ND ND ND ND ND <br /> 707-0937 MW-5 ND ND ND ND ND <br /> . 707-0938 MW-6 ND ND ND ND ND <br /> 707-0939 MW-7 ND ND ND ND ND <br /> 707-0940 MW-8 ND ND ND ND ND <br /> 707-0941 MW-9 ND ND ND ND ND <br /> 707-0942 VW-1 ND ND ND ND ND <br /> 707-0943 VW-3 ND ND ND ND ND <br /> 707-0944 VW-4 670 ND 45 61 98 <br /> Detection Limits 50 050 050 050 050 <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 /> Oture on File <br /> Alan B Kemp <br /> Project Manager Page 1 of 2 <br /> 7070934 MPD <t> <br />