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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 /> q1W Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> *PD8 Services Client Project ID Unocal#6981 4707 Pacific Ave Stockton Sampled Oct 15 - 16,97 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descrlpt Water Received Oct 16, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mad /8020 Reported Oct 31, 1997 <br /> Attention Jarre! Crider First Sample # 710-1203 <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 Mg/L erg/L pg/L pg/L <br /> 710-1203 MW-2 12,000 3,500 200 170 640 <br /> 710-1204 MW-4 ND ND ND ND ND <br /> 710-1205 MW-5 ND ND ND ND ND <br /> 710-1206 MW-6 ND ND ND ND ND <br /> 0 710-1207 MW-7 ND ND ND ND 46 v <br /> 710-1208 MW-9 ND ND ND ND ND <br /> 710-1209 VW-1 ND ND ND ND ND <br /> 710-1210 VW-3 ND ND ND ND ND <br /> Detection Limits so 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 /> E"UOIA ANALYTICAL, #1271 <br /> ignature on File <br /> Alan B Kemp <br /> Project Manager Page 1 of 2 <br /> 7101203 MPD <i a <br />