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Sequoia 680 Chesapeake Dave 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 /> Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> _ Envlros Client Proj ID Shell 141 N EI Dorado, Stock Sampled 04/03/96 <br /> 270 Perkins Ave Sample Descript SP-(A-D) Received 04/04/96 <br /> Sonoma, CA 95476 Matrix SOLID Extracted 04/08/96 <br /> Analysis Method 8015Mod/8020 Analyzed 04/09/96 <br /> Attention Joe Neely Lab Number 9604465-01 Reported 04J19196 <br /> QC Batch Number GC040896BTEXEXB <br /> Instrument ID GCHP18 <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 50 30 <br /> Methyl t-Butyl Ether 012 N D <br /> Benzene 0 025 N D <br /> Toluene 0 025 N D <br /> Ethyl Benzene 0 025 N D <br /> Xylenes (Total) 0 025 N D <br /> Chromatogram Pattern. .. C6-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 />