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Sequoia 680 Chesapeake Dnve 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 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916) 921-0100 <br /> Cambria ' Client Prol-ID Shell 2575 Country Club Blvd Sampled 12/11/97 <br /> 270 Perkins Ave Sample Descript MW-14-10G Received 12/19/97 <br /> Sonoma, CA 95476 Matrix SOLID Extracted 12/22/97 <br />- Analysis Method 8015Mod/8020 Analyzed 12/23/97 <br /> Attention Joe Neely Lab Number 9712C80-02 Reported 12J31197 <br /> QC Batch Number GC122297BTEXEXB <br /> Instrument ID GCHP22 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 1 0 N D <br /> Methyl t-Butyl Ether 00 N D <br /> Benzene 00050 ND <br /> Toluene 00050 ND <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 100 <br /> 4-Bromofluorobenzene 60 140 84 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> A k/-,o 0� <br /> gory <br /> Project Manager Page 2 <br />