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Sequoia 819 Striker Ave Ste 8 <br /> Sacramento,CA 95834 <br /> (91b)921-9600 <br /> Analytical <br /> FAX {916}921-0100 <br /> Gettler-Ryan-Dublin Project Former Unocal 0187,Stockton,CA 5211332 <br /> 6747 Sierra Court,Ste J Project Number 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 Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2110282-EPA 5030B JP/Tl <br /> Blank(2110282-BLKI) Prepared&Analyzed 11/19/02 - <br /> Blank(2110282-BLK2) Prepared& Analyzed 11/20/02 <br /> Tert-butyl alcohol ND 5 0 119/1 <br /> Methyl ter(-butyl ether ND 050 " <br /> Di-isopropyl ether ND 0 50 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tett-amyl methyl ether ND 050 " <br /> Ethanol ND 50 " <br /> Surrogate 1 2-DCA-d4 230 G 25 0 92 60-140 <br /> Laboratory Control Sample(2110282-BSI)- _ _ Prepared&Analyzed 11/19/02 <br /> Methyl ter(-butyl ether 148 050 ugfl 21 8 68 60-140 • <br /> Surrogate 1,2-DCA-d4 22 7 250 91 60-140 <br />.Laboratory Control Sample(2110282-BS2) Prepared&Analyzed 11/20/02 <br /> Methyl tert-butyl ether 152 0 50 ug/l 21 8 70 60-140 <br /> Surrogate 1,1-DCA-d4 220 250 88 60-140 <br /> Matrix Spike(2110282-MSI) Source S211249-01 Prepared& Analyzed-11/19/02 <br /> Methyl tert-butyl ether - 21 8 0 50 ugA 21 8 46 79 60-140 <br /> Surrogate 1,2-DCA-d4 236 " 25 0 94 60-140 <br /> Matrix Spike Du 2110282-MSDI Source 5211249-01 Pre ared&Anal zed I1/19/02 <br /> Methyl tert-butyl ether 23 5 050 ugll 21 8 46 87 60-140 8 25 <br /> Surrogate 1,2-DCA-d4 238 250 95 60-140 <br /> Batch 2110312-EPA 5030B PIT <br /> Blank 2110312-BLK1 Prepared& Analyzed 11/20/02 <br /> Teri-butyl alcohol ND 50 ug/l <br /> Sequoia Analyucal-Sacramento The results in this report apply to the samples analyzed in accordance with the ch <br /> of custody document Unless otherwise stared i esults are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 38 of 41 <br />