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Sequoia • 680 Chesapeake Drive Redwood City CA 9400 (415) 364 9600 FAX41 <br /> ( 5) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94548 (510) gag 960p FAX(SIO)988 9673 <br /> x,17 Analytical 819 5tnker Avenue,Suite a Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> WPD$Services Client Project Ib Unocal#5886,2701 W March Ln,Stockton S <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Sampled Sep 2, 1997 <br /> Concord, CA 94520 Received Sep 2, 1997 <br /> Analysis Method EPA 5030/8015 Mod /8020 Reported Sep 17, 1997 <br /> Attention Jarrel Crider First Sample # 709-0242 <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 lig/L Ing/L Ng/L Ing/L <br /> 709-0242 MW-1 ND ND ND ND ND <br /> 709-0243 MW-2 ND ND ND ND ND <br /> 709-0244 MW-3 ND ND ND ND ND <br /> 709-0245 MW-4D ND 10 ND ND ND <br /> 709-0246 MW-4S ND ND ND ND ND <br /> 709-0247 MW-5D ND ND ND ND ND <br /> 709-0248 MW-5S ND ND ND ND ND <br /> 709-0249 MW-6D ND ND ND ND ND <br /> 709-0250 MW-6S ND ND ND ND ND <br /> 709-0251 MW-7D ND ND ND ND ND <br /> 709-0252 MW-7S ND ND ND ND ND <br /> etec ion Limits 5.0 050 050 050 050 <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 /> Wature on File <br /> Alan B Kemp <br /> Project Manager Page 1 of 2 <br /> 7090242 MPD <1 <br />