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' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(.415) 364 9233 <br /> r'Y404 N Wtget Lane Walnuc Creek CA 94598 (510) 938 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EA Engineering Science &Tech - Client Prol ID " -Exxon 7-3942/83739421307 Sampled 05/11/95 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW-4 Received 05/12/95 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 05/19/95 - <br /> Attention T Faulkner _ Lab Number 9505983-06 _ Reported 051q3195 <br /> QC Batch Number GC051995BTEX20A - <br /> Instrument ID GCHP20 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br />' Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 100 520 <br /> Benzene 1 0 91 <br /> Toluene 10 N D <br /> Ethyl Benzene 1 0 8 7 <br /> Xylenes (Total) 1 0 2 9 <br /> Chromatogram Pattern Gas <br />' Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 84 <br /> b <br /> 1 <br /> LAnalytes reported as N D were not present above the stated limit of detection <br /> SEQUO NALYTICAL - ELAP #1210 <br /> eggy Penner <br /> Project Manager Page 6 <br />