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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Woget 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 /> Enviros Client Prol ID Shell 1267 Country Club, Stck Sampled 04/04/97 <br /> 270 Perkins Ave Sample Descrlpt SB-5-Liq Received 04/08/97 <br /> Sonoma, CA 95476 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 04/16/97 <br /> Attention Joe Neely Lab Number 9704512-13 Reported 04f22197 <br /> QC Batch Number GC041697BTEX18A <br /> Instrument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 5000 38000 <br /> Methyl t-Butyl Ether 250 370 <br /> Benzene 50 620 <br /> Toluene 50 200 <br /> Ethyl Benzene - 50 1700 <br /> 7100 <br /> Xylenes (Total) - 50 <br /> Chromatogram Pattern C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 144 Q <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> e Gregory <br /> Project Manager Page 3a <br />