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t 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 (91(5)921 9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> Analytical <br /> 1551 Industrial Road San Carlos CA 94070 41 1 1 (650)232-9600 FAX(650)232-9612 <br /> Pinnacle Client Project Ib Arco #6020, Manteca Sampled Apr 30, 1999 <br /> �t <br /> 3939 Cambridge Road Sample Descript Soil, D-7 (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 905-0036 Reported May 5, 1999 <br /> OC Batch Number SP0504998260EXA <br /> Instrument ID GC/MS-2 OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte _ Detection Limit Sample Results <br /> Ng/Kg pg/Kg , <br /> t Butanol 5,000 N D <br /> Methyl t-Butyl Ether (MTBE) 100 N D <br /> DI-Isopropyl Ether (DIPE) 100 N D <br /> Ethyl t-Butyl Ether (ETBE) 100 N D <br /> t-Amyl Methyl Ether (TAME) 100 N D <br /> Surrogates Control Limit% % Recovery <br /> 80 <br /> Dibromofluoromethane 50 -150 <br /> 1,2-Dichloroethane-d4 50 150 97 <br /> —A, <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 e <br /> ,Q� 905003D PPP <10> <br />