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819 Striker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> Gettler-Ryan-Dublin Project Former Unocal 0187,Stockton,CA S211332 <br /> 6747 Sierra Court,Ste J Project Ntunber N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/27/02 17 49 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Soiuce %REC RPD <br /> Anal to Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2110313-EPA 5030B JP/TJ - - <br /> Blank(2110313-BLK2) Prepared 11/20/02 Analyzed 11/21/02 _ <br /> Tert-butyl alcohol ND 5 0 ug/I <br /> Methyl teri-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> Ethanol ND 50 " <br /> _ Surrogate 1 1-DCA-d4 27 7 250 111 60-140 <br /> Laboratory Control Sample(2110313-BSI) Prepared& Analyzed 11/18/02 <br /> Methyl Cert-butyl ether 209 0 50 ugA 21 8 96 60-140 <br /> Surrogate 1 2-DCA-d4 24 7 250 99 60-140 <br /> Laboratory Control Sample(2710313-BS2) Prepared&Analyzed 11/20/02 <br /> Methyl tert-butyl ether 200 0 50 119/1 21 8 92 60-140 <br /> Surrogate 12-DCA-d4 282 250 113 60-140 <br /> —Matrix Spike(2110313-MSI)_ _ ---Source S211332-09____Prepared-I1/20/02 Analyzed-11/21/02---- <br /> Methyl <br /> 11/21/02—_T-- _Methyl tert-butyl ether 20 8 050 ugA 21 8 ND 95 60-140 <br /> Surrogate 11-DCA-d4 286 250 114 60-140 <br /> Matrix Spike Dup(2710313-_MSDI) Source 5211332-09 Prepared 11/20/02 Analyzed 11/21/02 ^' ; <br /> Methyl Cert-butyl ether 200 050 ug/1 21 8 ND 92 60-140 4 25 <br /> Surrogate 1,2-DCA-d4 15 7 250 103 60-140 <br /> Sequoia Analytical-Sacramento The results in this repot t apply to the samples analyzed in accordance with the cha <br /> of custody document Unless otherwise staled, results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 40 of 41 <br />