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Sequoia 680 Chesapeake Dnve Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> li) 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Enviros Client Prol ID Shell 4315 Waterloo, Stockton Sampled 02/21/96 <br /> 270 Perkins Ave Sample Descript SB-3-9 Received 02/23/96 <br /> Sonoma, CA 95476 Matrix SOLID Extracted 02/26/96 <br /> Analysis Method 8015Mod/8020 Analyzed 02/27/96 <br /> Attention Joe Neely Lab Number 9602G27-02 Reported 03JO1196 <br /> QC Batch Number GCO22696BTEXEXA - <br /> Instrument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg m9/Kg <br /> TPPH as Gas - 100 770 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene - - 050 3 6 <br /> Xylenes (Total) 0 50 12 <br /> Chromatogram Pattern C8-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 86 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Gregory <br /> Project Manager Page 2 <br />