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r I Chesapeake Dnve Redwood City CA 94063 (650)364 9600 FAX(650)364 9233 <br /> Sequoia 404 N V41get Lane Walnut Creek CA 94598 (925)988-9600 TAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)791-0342 <br /> Analytical 1551 Industnal Road San Carlos CA 94070-4111 (650) 232 9600 FAX(650) 232 9612 <br /> i <br /> ) <br /> Pinnacle Client Project ID Arco #6020, Manteca Sampled Apr 30, 1999 <br /> 3939 Cambridge Road Sample Descnpt Sod, D-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 905-0030 Reported May 5, 1999 <br /> CC Batch Number SP0504998260EXA <br /> Instrument ID GC/MS 2 OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte - Detection Limit Sample Results <br /> pg/KJ N9/K9 ' <br /> t-Butanol 5,000 N D <br /> Methyl t-Butyl Ether (MTBE) 100 N D <br /> Di-Isopropyl Ether (DIPS) 100 N D <br /> Ethyl t-Butyl Ether (ETRE) 100 N D <br /> t-Amyl Methyl Ether (TAME) 100 N D <br /> Surrogates Control Limit % % Recovery <br /> Dlbromofluoromethane 50 150 78 <br /> 1,2-Dlchloroethane-d4 50 150 _ 84 <br /> a <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL #1271 <br /> k-k��' �Q <br /> Melissa A Brewer <br /> Project Manager <br /> 9050030 PPP <4> <br />