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cn <br /> Sequoia819 Sinker Ave Ste 8 <br /> tD <br /> Sacramento,CA 95834 <br /> Analytical (916)921-(915)92 k-011oo <br /> FAX 00 + <br /> www sequoialabs com <br /> Gettler-Ryan-Dublin Project Former Unocal 2859,Stockton,CA S211346 <br /> 6747 Sierra Court,Ste J Pmject Number N/A I Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/04102 14 47 <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 2110313- EPA 5030113 1P/Tl <br /> Matrix Spike(2110313-MSI) Source S211332-09 r Prepared 11/20/02 Analyzed 11/21/02 1 ~ <br /> Methyl tert-butyl ether 208 20 ugA 218 ND 95 60-140 <br /> Surrogate 1 2-DCA-d4 286 11250 114 60-140 <br /> Matrix Spike Dup((2110313-MSDI) Source 5211332-09 Prepared 11/20/02_ Analyzed 11/21/02 <br /> Methyl tert-butyl ether 200 20 ugA 21 8 ND 92 60-140 4 25 <br /> Surrogate 1 2-DCA-d4 257 250 103 60-140 <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical i eport must be reproduced to its entirety <br /> Page 21 of 22 <br />