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* Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX{916)921-01oo <br /> www.sequoialabs.corn <br /> 1 <br /> i <br /> Delta Environmental COnsultants(Cameron Park) Project: ARCO 5469, Stockton,CA <br /> 3330 Cameron Park Dr. Project Number: N/A <br /> j Cameron,Park CA,95682 =10:32 <br /> Project Manager: Jay Johnson <br /> I <br /> Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Analyte p 5 Spike Source %REC RPD <br /> Limit Units Level Result °/gREC Limits RPh Limit Notes <br /> Batch 0]20201 -EPA 5030B[P/T� Result <br /> Matrix Spike(0120201-MSI) Source: S012123-01 Prepared&Analyzed: 12/18/00 <br /> Methyl tent-butyl ether 75.0 <br /> 2.00 ug/l 50.0 18.7 113 60-140 <br /> Surrogate:I,2-DCA-d4 52.6 <br /> 11 50.0 105 60-140 <br /> Matrix Spike Dup(012020I-MSDI) _ Source: S012123-01 Prepared&Analyzed: 12/I8/00 <br /> Methyl tert-butyl ether 74.6 <br /> 2.00 ug/I 50.0 18.7'11260-140 0.53.5 25 <br /> Surrogate:1,2-DCA-d4 51,8 <br /> 50.0 106 60-140 <br /> • <br /> �9uoia Analytical- Sacramento The results in this PP <br /> report apply to the samples ed in accordance with the chain of <br /> P ples analyzed <br /> custody document. This analytical report must be reproduced in its entirety, <br /> Page 12 of 14 <br />