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Sequoia680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Cambria - Client Prol ID Shell 341E Main Sampled 03/23/98 <br /> 1144 65th St Suite C Sample Descrlpt MW-1,33 5-35 Received 03/24/98 <br /> Oakland, CA 94608 Matrix SOLID Extracted 03/25/98 <br /> Analysis Method 8015Mod/8020 Analyzed 03/25/98 <br /> Attention Paul Waite Lab Number 9803F79-07 - Reported 03f 31 j98 <br /> -C Batch Number GC032498BTEXEXB <br /> Instrument ID GCHP7 <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 /> Trifluorotoluene 70 130 102 <br /> 4-Bromofluorobenzene 60 140 75 <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 13 <br />