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Sequoia 680 Chesapeake Drive Redwood City,CA 940 (415) 364 9600 FAX(415)364 9233 <br /> srV" 404 N Wiget Lane Walnut Creek CA 94598 <br /> (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> &M PDS Services Client Project ID Unocal#5886,2701 W March Ln ,Stockton Sampled Sep 2, 1997 <br /> 2401 Stanwell Dr, Ste 300 Sample Descnpt Water Received Sep 2, 1997 <br /> Concord, CA 94520 Analysis for MTBE (Modified EPA 8020) <br /> Attention Jarrel Crider First Sample # 709-0242 Analyzed Sep 15, 1997 <br /> Reported Sep 17, 1997 <br /> LABORATORY ANALYSIS FOR. MTBE (Modified EPA 8020) <br /> Sample Sample Sample <br /> Number Description Detection Limit Result <br /> µg/L lig/L <br /> 709-0242 MW-1 50 530 <br /> 709-0243 MW-2 250 4,400 <br /> 709-0244 MW-3 25 2,100 <br /> 709-0245 MW-4D 50 99 <br /> is 709-0246 MW-4S 50 N D <br /> 709-0247 MW-5D 50 N D <br /> 709-0248 MW-5S 50 N D <br /> 709-0249 MW-6D 50 130 <br /> 709-0250 MW-6S 50 N D <br /> 709-0251 MW-7D 50 N D <br /> 709-0252 MW-7S 50 N D <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> Ognature on File <br /> Alan B Kemp <br /> Project Manager <br /> 7090242 MPD <3> <br />