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404 N Wiget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> 4 i!D (925)98&9600 <br /> Analytical _ FAX(925)988-9673 <br /> wo <br /> Oettler-Ryan-Dublin Client Project ID Tosco SS#6981, Stockton Sampled Jul 15, 1999 <br /> 6747 Sierra Court, Suite J Sample Descnpt Water, MW-7 Received Jul 16, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 8260 Analyzed Jul 29, 1999 <br /> Attention Deanna Harding Lab Number 907-1236 Reported Aug 4, 1999 <br /> OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> Ng/L Ng/L <br /> t-Butanol 200 N D <br /> et y t- uty Ether .. .... 40 .. .. ... 320 <br /> Di-Isopropyl ter 40 <br /> Ethyl t-Butyl Ether(ETBE) 40 N D <br /> t-Amyl Methyl Ether (TAME) 40 N D <br /> Surrogates Control Limit % % Recovery <br /> Di bromofl uoro methane 50 150 102 <br /> 1,2-Dichloroethane-d4 50 150 101 <br /> 0 <br /> Analytes reported as N 0 were not present above the stated limit of detection Because matrix effects and/or other factors <br /> required additional sample dilution,detection limits for this sample have been raised <br /> SEQUOIA ANALYTICAL, #1271 <br /> anne Fegley <br /> Project Manager <br /> 9071230 GET <9> <br /> �J <br />