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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> eD 404 N Wlget 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 /> 1455 McDowell Blvd North,Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Cambria Client Prol ID _ Shell, 341 E Main, Ripon Sampled 03/23/98 <br /> 1144 65th St Suite C Sample Descript MW1, 27 5-29 Received 03/24/98 <br /> Oakland, CA 94608 Matrix SOLID Extracted 04/03/98 <br /> _ Analysis Method 8015Mod/8020 Analyzed 04/06/98 <br /> Attention Paul Waite Lab Number 98031-68-01 Reported 04109198 <br /> QC Batch Number GC040398BTEXEXA <br /> Instrument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 10 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trrlluorotoluene 70 130 96 <br /> 4-Bromofluorobenzene 60 140 102 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> rd Herling <br /> Project Manager Page 4 <br />