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i 680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925►988 9600 FAX(925)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(9 16)921-0100 <br /> Analytical '455 McDowell Bad North Ste D Petaluma CA 94954 (707)792 1865 FAX(650)79Z232 0342 <br /> ',551 Industrial Road San Carlos CA 94070 4111 (650)232 9600 FAX(650} 232-9612 ' <br /> Pinnacle Client Project Ib ' Arco #6020, Manteca Sampled Apr 30, 1999 <br /> 3939 Cambridge Road Sample Descript Soil, D-3 (2 5') Received Apr 30, 1999 <br /> Cameron Park, CA 95682 Analysis Method EPA 8260 Analyzed May 5, 1999 <br /> Attention Joel Coffman Lab Number 905-0032 Reported May 5, 1999 <br /> QC Batch Number SP0504998260EXA <br /> Instrument ID GC/MS-2 OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> Ng/Kg Ng/Kg ' <br /> t-Butanol 5,000 N D <br /> Methyl t-Butyl Ether (MTBE) 100 N D <br /> Didsopropyl Ether (DIPE) 100 N D <br /> Ethyl t-Butyl Ether (ETBE) 100 N D <br /> t-Amy! Methyl Ether (TAME) 100 N D <br /> Surrogates Control Limit % % Recovery <br /> Dlbromofluoromethane 50 150 80 <br /> 1,2-Dlchloroethane-d4 50 150 86 <br /> — --- - — -- - - -- - -- dI <br /> Analytes reported as N D were not present above the stated limit of detection ` <br /> SEQUOIA ANALYTICAL, #1271 <br /> 0 - <br /> Melissa A Brewer <br /> Project Manager <br /> 9050030PPP <6> <br />