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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 fAX(650) 364-9233 <br /> t 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9Z1-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792-1865 FAX(707) 79Z-0342 <br /> Blaine Tech Services Client Prol 1D Chevron 9-8264/980609-J1 Sampled 06/09/98 <br /> 1680 Rogers Avenue Sample Descript MW-4 Received 06/10/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 06/11/98 <br /> Attention Fran Thie Lab Number 9806003-04 Reported 06j25198 <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 25 570 <br /> Benzene 0 50 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 87 <br />• <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA A ALYTICAL - ELAP #1849 <br /> ory <br /> olect Manager Page 12 <br />