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, ' t 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 /> WI,F Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Enviros Client Prol ID Shell 141 N EI Dorado, Stock Sampled 04/02/96 <br /> 270 Perkins Ave Sample Descript B-4-36 Received 04/04/96 <br /> Sonoma, CA 95476 Matrix SOLID Extracted 04/09/96 <br /> Analysis Method 8015Mod/8020 Analyzed 04/10/96 <br /> Attention Joe Neel} Lab Number 9604470-12 Reported 04j19f 96 <br /> QC Batch Number GC040996BTEXEXB <br /> Instrument ID GCHP06 <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 91 <br />• <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> Gregory <br /> Project Manager Page 14 <br />