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t Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (4 15) 364 9600 FAX(415) 364 9233 <br /> Z 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 OI00 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942/5153942 1300 Sampled 02/03/97 <br /> F468Mt Diablo Blvd Ste 13100 Sample Descript RW2 Received 02/04/97 <br /> fayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/05/97 <br /> Attention Chnsta Marting Lab Number 9702110-08 Reported 02j12/97 <br /> IC Batch Number GCO20497BTEX03B <br /> strument ID GCHP03 <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 2500 6100 <br /> ethyl t-Butyl Ether 120 240 <br /> Benzene 25 170 <br /> Toluene 25 120 <br /> IlEthyl Benzene 25 270 <br /> ylenes (Total) 25 640 <br /> Chromatogram Pattern Gas <br /> urrogates Control Limits % % Recovery <br /> rifluorotoluene 70 130 112 <br /> 1 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP 01210 <br /> 4WOor'liflett <br /> sect Manager Page 8 <br />