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} <br /> Sequoia 819 Avenue Suite <br /> Sacramento CA 958344 <br /> e5) (916)921-9600 <br /> A������ � FAX(916)921-0100 <br />*qw <br /> Analytical www sequoialabs com <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2186, Stockton,CA <br /> 3330 Cameron Park Dr PrglectNurnber N/A Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 04/02/01 14 39 <br /> Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source °/GREG RPD <br /> A^s}yte Res-It Lirut Units Lewl Result %REC Limits RPD L mi* Notes <br /> Batch 1030398- EPA 5030B [P/T] <br /> Blank(1030398-BLKI) Prepared& Analyzed 03/29/01 <br /> Tert-butyl alcohol ND 200 ug/I <br /> Methyl tert-butyl ether ND 200 " <br /> Di-Isopropyl ether ND 200 " <br /> Ethyl Cert-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Ethanol ND 3000 <br /> Surrogate 12-DCA-d4 409 .500 818 60-140 <br /> LCS(1030398-BSI) Prepared&Analyzed 03/29/01 <br /> Methyl tert-butyl ether 48 0 200 ug/I 500 96 0 60-140 <br />*i rogate 12 DCA-d4 430 11 )0 0 860 60-140 <br /> Matrix Spike(1030398-MSI) Source S103323-07 Prepared& Analyzed 03/29/01 <br /> Methvl tert-butyl ether 482 200 u;/1 500 ND 964 60-140 <br /> Surrogate 12-DCA-d4 428 11 500 856 60-140 <br /> Matrix Spike Dup(1030398-MSDI) Source S103323-07 Prepared L 4nal}zed 03/29/01 <br /> Methyl tert-butyl ether 498 200 ug/I 500 ND 996 60-140 327 25 <br /> Sur rogate 12-DCA-d4 440 500 880 60-140 <br /> equola Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced to its entiret)> <br /> Page 9 of 10 <br /> a <br />