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r'Y ' 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-%00 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Pral ID Chevron 9-4275/980910-Z2 Sampled 09/10/98- <br /> 1680 Rogers Avenue Sample Descrlpt MW-6 Received 09/11/98 <br /> San,lose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 09/17/98 <br /> Attention Fran Thie Lab Number 9809721-06 Reported 09125198 <br /> CSC Batch Number GC091798802009A <br /> Instrument ID HP9 <br /> Total Purgeable Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 340 <br /> Methyl t-Butyl Ether 25 38 <br /> Benzene 050 41 <br /> Toluene 050 47 <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Unidentified HC >C7 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 131 0 <br /> i <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANA YTICAL - ELA}� #1271 <br /> ry <br /> ct anager Page 6 <br />