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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(916)921-01oo <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707) 792-0342 <br /> 1551 Industrial Road San Carlos CA 94070 411 1 (650)232 9600 FAX(650)232-9612 <br /> Pinnacle ; Client Project ID Arco #6020, Manteca Sampled Apr 30, 1999 <br /> 3939 Cambridge Road Sample Descrlpt Sod, PL-1 (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 905-0038 Reported May 5, 1999 <br /> QC Batch Number SP0504998260EXA <br /> Instrument ID GC/MS 2 <br /> OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> jig/Kg Ng/K9 <br /> t-Butanol 5,000 N D <br /> Methyl t-Butyl Ether 100 4,400 <br /> Di-Isopropyl ter ' <br /> Ethyl t-Butyl Ether (ETBE) 100 N D <br /> t-Amyl Methyl Ether (TAME) 100 N D <br /> r <br /> Surrogates Control Limit% % Recovery <br /> Dlbromofluoromethane 50 150 82 <br /> 1 2-Dlchloroethane-d4 50 150 97 <br /> r <br /> 1 <br /> Anaiytes reported as N D were not present above the stated limit of detection - <br /> SEQUOIA ANALYTICAL, #1271 <br /> Melissa <br /> S ✓' r <br /> Melissa A Brewer <br /> Project Manager <br /> , } 9050030 PPP <12> e <br />