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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (5 10) 98B 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921-0 100 <br /> Cambria Client Proj ID Shell 2575 Country Club Blvd Sampled 12/11/97 <br /> 270 Perkins Ave Sample Descript MW-14-28 Received 12/19/97 <br />= Sonoma, CA 95476 Matrix SOLID Extracted 12/22/97 <br /> Analysis Method 8015Mod/6020 Analyzed 12/23/97 <br /> Attention Joe Neely Lab Number 9712C80-04 Reported 12J31 J97 <br /> OC 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 10 N D <br /> Methyl t-Butyl Ether 0 025 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 70 130 106 <br /> 4-Bromofluorobenzene 60 140 89 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> We Gre ry <br /> Project Manager Page 4 <br />