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Sequoia D,,-,r 680 ChesapeakeD,,-,r Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> W� Analytical 819 Stn ker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 Ot00 <br /> -,-EA Engineering Science &Tech Client Proj ID Exxon 7-3942/51539421307 Sampled 04/18/96 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript V-3 Received 04/19/96 <br /> w1 Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 04/24/96 <br /> Attention Marla Guensler Lab Number 9604E23-26 Reported_05110 96 <br /> QC Batch Number�GC042496BTEX17A <br /> Instrument ID GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />' Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 10000 .. . 73000 <br /> Methyl t-Butyl Ether 500 N D <br /> Benzene 100 N D <br /> Toluene 100 .. 4200 <br />' Ethyl Benzene 100 •• •. 3400 <br /> Xylenes (Total) 100 16008 <br /> Chromatogram Pattern Gas <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 90 <br /> I <br /> 1 <br /> 1 <br /> I <br />(Analytes reported as N 0 were not present above the stated lima of detection <br /> SEQU IA A YTICAL ELAP #1210 <br /> I <br /> in ett <br /> Project Manager Page 7 <br /> I <br />