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Sequoia 680 Chesapeake Dnvc Redwood City CA 94063 (4t5) 364 9600 FAX (415) 364 97.33 <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) 911 9600 FAX(916) 921 0100 <br /> Enviros Client Prol ID Shell 2575 Country Club, Stck Sampled 01/02/97 <br /> 270 Perkins Ave Sample Descript MW-6-B Received 01/03/97 <br /> Sonoma, CA 95476 Matrix SOLID Extracted 01/06/97 <br /> Analysis Method 8015Mod/8020 Analyzed 01/06/97 <br /> Attention-Joe Neely Lab Number 9701119-02 Reported 01J09197 <br /> DC Batch Number GC010697BTEXEXA <br /> Instrument 10 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 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 86 <br />• <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br />—WGr gory <br /> e Manager Page 2 <br />