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Sequoia 680 Chesapeake Drive Redwood City.CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N,Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue.Suite B Sacramento,CA 95 (916)971-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd.North.Ste p Petaluma.CA 949544 (707) 792-1865 FAX(707) 792-0342 <br /> �MCON -.Sac <br /> Client Project ID ARCO 2186, Stocktori, CA Sampled: Sep 21 1998 <br /> 1433 N. Market Blvd, Sample Descript: Water, MW-2(74') Received: Sep 21, 1998:::: <br /> Sacramento, CA 95834 Analysis Method: EPA 5030/8260 Analyzed: Oct 6, 1998:::' <br /> Attention Dave Foley Lab Number S809241 02 <br /> Reported Oct 8 19981. <br /> OXYGENATES by GUMS (EPA 8260) <br /> Analyte Reporting Limit Sample Results <br /> Ing/L lig/L <br /> Tertiarybutanol................... ............................................ 200N.D. <br /> ................... . <br /> Methyl tertiary butyl ether(MTBE).................................... 2.0 ................... N.D. <br /> ................ . <br /> Di-isopropyl ether(DIPE)................................................. 2.0N.D- <br /> ............................... <br /> thyl tertiary butyt ether(ETBE)....................................... 2.0 <br /> ................................•--.. N.D. <br /> Tertiary amyl methyl ether(TAME)..................... <br /> ............. 2.0 ..................................-.. N,D. <br /> Surrogates Control limit % % Recovery <br /> 1,Ohloroethane-d4 ................................................... 50-150 ............... 90 <br />'Sample was analyzed outside the recommended hold time for this method,due to instrument problems. <br />\nalytes reported as N.D. were not detected at or above the reporting limit. <br /> 3EU0111,t ANALYTICAL, LA #1271 <br /> 0 <br />/ ✓ i <br /> Ron W. Bobel <br /> 3roject Manager/Sacramento Laboratory <br /> S809241.EMC <1> <br />