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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> frrll� ue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Analytical 819 Striker Aven <br /> Enviros Client Prol ID Shell 1267 Country Club, Stck Sampled 04/04/97 <br /> 270 Perkins Ave Sample Descript SB-2-31 Received 04/08/97 <br /> Sonoma, CA 95476 Matrix SOLID Extracted 04/11/97 <br /> Analysis Method 8015Mod/8020 Analyzed 04/15/97 <br />' Attention Joe Neely Lab Number 9704512-06 Reported 04J22197 <br /> OC Batch Number GC041197BTEXEXA <br /> Instrument ID GCHP07 <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 - 25 27 <br /> Methyl t-Butyl Ether 0 062 016 <br /> Benzene 0 012 Oil <br /> Toluene 0 012 010 <br /> Ethyl Benzene 0 012 0028 <br /> Xylenes (Total) 0 012 031 <br /> Chromatogram Pattern C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 89 <br /> 4-Bromofluorobenzene 60 140 93 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Oer gory <br /> Project Manager Page i5 <br />