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' <br /> Sequoia 404 <br /> 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 /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> AI111yt1C11 <br /> MPDS Services Client Project ID: Unocal#0123,1034 Central Ave.,Tracy Sampled: Sep 3, 1997;:: <br /> 2401 Stanwell Dr.; Ste. 300 Matrix Descript: Water Received: Sep 3,1997. <br /> 1997 <br /> Concord, CA 94520 Analysis Method: EPA 5030/8015 Mod./8020 Reported: Sep 25, 1997 <br /> Attention: Jarrel Crider First Sample#: 709-0187 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Purgeable EthylTotal. <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes <br /> Ng/L. Ng/L pg/L Ng/L µg/L <br /> 709-0187 U-1 ND 1.1 ND ND ND <br /> 709-0188 U-2 ND ND ND N.D. ND <br /> 709-0189 U-3 ND ND ND ND ND <br /> 709-0190 U-4 2,200 59 17 160 42 <br /> i <br /> 3 <br /> etection emits: 50 : 0.50 0.50 0.50 0.50 <br /> Total Purgeable Petroleum Hydrocarbons are quantitated against a fresh gasoline standard. <br /> Analytes reported as NO were not present above the stated-limitof.detection, <br /> SEQUOIA ANALYTICAL, #1271 <br /> nature on File <br /> Alan B. Kemp <br /> Project Manager Page 1 of 2 <br /> 7090187.MPD <1> <br /> g� <br />