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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 (925)988-9600 FAX(9Z5)988-9673 <br /> Analytical 819 Striker Avenue Suite B Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792 0342 <br /> Blaine Tech Services Client Prol ID Chevron 9-4275/980624-J1 Sampled 06/24/98 <br /> 1680 Rogers Avenue Sample Descript MW-4 Received 06/25/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 06/30/98 <br /> Attention Fran Thie Lab Number 9806G68-04 Reported 07jo9198 <br /> QC Batch Number GC063098BTEX02A _ <br /> Instrument ID GCHP02 <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 50 N D <br /> Methyl t-Butyl Ether Soo 4700 <br /> Benzene 050 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifiluorotoluene 70 130 87 <br /> Analytes reported as N 17 were not present above the stated limit of detection <br /> SEQUOIA YTICAL - ELAP #1210 <br /> r <br /> Project Manager Page 8 <br />