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' Sequoia 680 Chesapeake Drive Rcdwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> �Ill� Analytical 819 Striker Avenue Suitc 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> EA Engineering Science &Tech -Client Proj ID Exxon 7-0137, 5150137 1300 Sampled 07/21/97 <br /> 68 Mt Diablo Blvd Ste 13100 Sample Descnpt MW4 Received 07/23/97 <br /> fayette, CA 94549 Matrix LIQUID <br /> 4D <br /> Analysis Method 8015Mod/8020 Analyzed 07/28/97 <br /> Attention Chrlsta Martin g Lab Number 97071397_-05 _ Reported 08J04197 <br /> VBatch Number- GC072897STEX03A <br /> rument ID GCHP3 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Fnalyte Detection Limit Sample Results <br /> ug/L ug/L <br /> feethyl <br /> PH as Gas 50 N D <br /> t-Butyl Ether 25 N D <br /> nzene 050 N D <br /> Toluene 050 N D <br /> #hyl Benzene 050 N D <br /> ylenes (Total) 050 N D <br /> hromatogram Pattern <br /> if arrogates Control Limits % % Recovery <br /> rrfluorotoluene 70 130 101 <br /> knalyies reported as N D were not present above the stated limit of detection <br /> FQUOIA ANALYTICAL - ELAP #1210 <br /> PFollett <br /> ct Manager Page 5 <br />