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- \ Sequoia 680 Chesapeake Drive Redwood 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 /> AVAnalytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942,5153942 1300 Sampled 03/03/98 _ <br /> 68 Mt Diablo Blvd Ste B100 Sample Descrlpt RW4 Deceived 03/04/98 <br /> fayette, CA 94549 Matrix LIQUID <br /> 4D <br /> Analysis Method 8015Mod/8020 Analyzed 03/17/98 <br /> Attention Christa Marting_ Lab Number 9803306-15 Reported 03131198_ <br /> c Batch Number GC031798BTEX01A <br /> strument ID GCHP1 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> nalyte Detection Limit Sample Results <br />� <br /> ug/L ug/L <br /> kTenzene <br /> PH as Gas 5000 38000 <br /> thyl t-Butyl Ether 500 1100 <br /> 50 1500 <br /> Toluene 50 4600 <br /> Ef-thyl Benzene 50 2100 <br /> ylenes (Total) 50 6000 <br /> hromatogram Pattern Gas <br /> jg3I <br /> arrogates Control Limits % % Recover <br /> rifluorotoluene 70 130 118 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> t-QUOIA ANALYTICAL - LAP #1210 <br /> P—rdl-lerling <br /> ct Manager Page 12 <br /> .P9. <br />