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Sequoia680 Chesapeake Drtve Redwood City CA 94063 <br /> (D O) 364 9600 FAX(650)364 9233 <br /> N 404 Wigtt Lane Walnut Creek CA 99598 {SIO) 488 9600 FAX(510) 988 9673 <br /> Analytical 819 Stnker Avenue Suric 8 Sacramento CA 95834 (916) 921 9600 FAX{916) 921 0100 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-0137, 51501 37 1300 Sampled 10/10/97 <br /> F468 Mt Diablo Blvd Ste B100 Sample Descrlpt MW3 Received 10/13/97 <br /> afayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 10/21/97 <br /> Attention Christa Marting Lab Number 9710816-03 Reported 10J24197 <br /> IC Batch Number GC1 02197BTEX21 A <br /> strument 1D GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> 14nalyte Detection Limit Sample Results <br /> ug/L ug/L <br /> PPH as Gas 50 N D <br /> ethyl t-Butyl Ether 25 47 <br /> enzene 050 N D <br /> Toluene 050 N D <br /> thyl Benzene 050 N D <br /> ylenes (Total) 050 N D <br /> hromatogram Pattern <br /> arrogates Control Limits % % Recovery <br /> rifluorotoluene 70 130 90 <br /> vnalyles reported as N D were not present above the stated limit of detection <br /> 11QUOIA ANALYTICAL ELAP #1210 <br /> 1 � <br /> Prd Herling <br /> ct Manager Page 3 <br /> 1 <br />