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' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364 9233 <br /> q404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9573 <br /> �III� Analytical 819 Striker Avenue SULte 8 Sacramento CA 95834 (916) 921 9600 FAX (916)92t 0100 <br /> EA Engineering Science &Tech Client Proi ID Exxon 7-3942, 51539 42 1300 Sampled 11/10/97 <br /> 3488 Mt Diablo Blvd Ste B100 Sample Descript RW4 Received 11/12/97 <br />'Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/22/97 <br /> Attention Chnsta Marting Lab Number 9711732-14 Reported 12102197 <br /> IC Batch Number GC1 12297BTEX21 A <br /> strument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />!Analyte Detection Limit Sample Resuits <br /> ug/L ug/L <br />'TPPH as Gas 1000 4100 <br /> Methyl t-Butyl Ether 50 98 <br /> Benzene 10 280 <br /> Toluene 10 350 <br /> Ethyl Benzene 10 320 <br /> Xylenes (Total) 10 570 <br /> Chromatogram Pattern Gas <br /> lSurrogates Control Limits % % Recovery <br /> Tnfluorotoluene 70 130 97 <br /> lie <br /> Analytes reported as N D were not present above the stated limit of detection <br /> REQUOIA ANALYTICAL - ELAP 41210 <br /> d Herhng <br />�r ct MPage <br /> anager is <br /> 1 <br />