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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 0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 ( 5 )792 1865 FAX( 792 0342 <br /> 1551 Industrial Road San Carlos CA 94070-411 1 (b6500)232-9600 FAX(b50}6501 232-9612 <br /> Pinnacle Client Project ID Arco #6020, Manteca Sampled Apr 30, 1999 <br /> 3939 Cambridge Road Sample Descript Solt, PL-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 905-0040 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 /> N9/K9 N9/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 /> Dlbromofluoromethane 50 150 80 !� <br /> 1,2-Dlchloroethane-d4 50 150 94 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> Melissa A Brewer <br /> Project Manager <br /> 9050030 PPP <14> <br />