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+ / \ Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> .,4.� 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Straker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Enviros Client Prof ID Shell 1267 Country Club, Stck Sampled 04/04/97 <br /> 270 Perkins Ave Sample Descript SB-1-30 Received 04/08/97 <br /> Sonoma, CA 95476 Matrix SOLID Extracted 04/11/97 <br /> Analysis Method 8015Mod/8020 Analyzed 04/12/97 „ <br /> Attention Joe Neely Lab Number 9704512-02 Reported 04J22197 <br />)C Batch Number GC0411976TEXEXA <br /> nstrument ID GCHP01 <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 is <br /> Methyl t-Butyl Ether 0 025 0 028 <br /> Benzene 00050 N D <br /> Toluene 0 0050 0 014 <br /> Ethyl Benzene 00050 0 038 <br /> Xylenes (Total) 00050 0 055 <br /> Chromatogram Pattern C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 99 <br /> 4-Bromofluorobenzene 60 140 102 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> 'M.� AV-E <br /> r ory <br /> Project Manager Page 3 <br />