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Sequoia680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 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 0100 <br /> NCO <br /> Blaine Tech Services Client Pro] ID Chevron 9-8264/970521-H3 Sampled 05/21/97 <br /> 1680 Rogers Avenue Sample Descript MW-4 Received 05/22/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 05/30/97 <br /> Attention Fran Thie Lab Number 9705C27-04 Reported 06J05/97 <br /> QC Batch Number GC053097BTEX22A <br /> Instrument ID GCHP22 <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 25 140 <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 74 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOI L IC - ELAP #1210 <br /> Peggy Pe er <br /> )ect Manager Page 12 <br />