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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 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stryker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Cambria Client Prol ID Shell 2575 Country Club Blvd Sampled 12/09/97 <br /> 270 Perkins Ave Sample Descnpt MW-12-A2 Received 12/11/97 <br /> Sonoma, CA 95476 Matrix SOLID Extracted 12/19/97 <br /> Analysis Method 8015Mod/8020 Analyzed 12/22/97 <br />' Attention Joe Neely Lab Number 9712705-02 Reported 12J30J97 <br /> QC Batch Number GC1219976TEXEXA <br /> Instrument ID GCHP1 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas -- - - - 1.0 - -- - 12 <br /> Benzene .. .. .. 00050 .. .. 0 019 <br /> Toluene ..... - 00050 .. 014 <br /> Ethyl Benzene .. _ 00050 0 048 <br /> Xylenes (Total) .. 00050 ... 039 <br /> Chromatogram Pattern -- - - C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 105 <br /> 4-Bromoflucrobenzene 60 140 74 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA AN YTICAL - ELAP #1210 <br /> Mi a gory <br /> Project Manager Page 3 <br />