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Sequoia 819 Straker Avenue Suite S <br /> 958 <br /> Sacramento CA 95834 � <br /> (916)921-9600 <br /> Analytical FAX(916)921 <br /> J,/ www sequoialabscom com <br /> Delta Environmental Consultants(Cameron Park) Project Arco 6100,Tracy,CA <br /> 3330 Cameron Park Dr Project Number N/A Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 02/27/01 18 01 <br /> Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits 1tPD Limit Notes <br /> Batch 1020161 -BPA 5030B [P/Tl <br /> Blank(1020161-BLKI) Preparers&Analyzed 02/20/01 <br /> Tert-butyl alcohol ND 200 ug/l <br /> Methyl tert-butyl ether ND 2 00 " <br /> Di-isopropyl ether ND 200 <br /> Ethyl Cert-butyl ether ND 2 00 " <br /> Tert-amyl methyl ether ND 200 " <br /> Ethanol ND 3000 " <br /> Surrogate 12-DCA-d4 469 500 938 60-140 <br /> LCS(1020161-BSI) Prepared&Analyzed 02/20/01 <br /> Methyl Cert-butyl ether 470 200 ug/l 500 94 0 60-140 <br /> Surrogate 12-DCA-d4 469 500 938 60-140 <br /> *Dup(1020161-BSD/) Prepared&Analyzed 02/20/01 <br /> Methyl tent-butyl ether 48 8 2 00 ug/1 500 97 6 60-140 3 76 25 <br /> Surrogate 1 2-DCA-d4 474 500 948 60-140 <br /> Matrix Spike(1020161-MSI) Source 5102116-07 Prepared&Analyzed 02/20/01 <br /> Methyl tert-butyl ether 466 2 00 ugA 500 ND 932 60-140 <br /> Surrogate 12-DCA-d4 461 " 500 922 60-140 <br /> Matrix Spike Dup(1020161-MSDI) Source 5102116-07 Prepared&Analyzed 02/20/01 <br /> Methyl tert-butyl ether 489 2 00 ug/l 500 ND 978 60-140 4 82 25 <br /> Surrogate 12-DCA-d4 477 500 95 4 60-140 <br /> Batch 1020207-BPA 5030B [P/TI <br /> Blank(1020207-BLKI) - Prepared&Analyzed 02/21/01 <br /> Tert-butyl alcohol ND 200 ug/1 <br /> Methyl tert-butyl ether ND 2 00 " <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Ethanol ND 3000 " <br /> Surrogate 12-DCA-d4 462 500 924 60-140 <br /> o1a Analytical- Sacramento The results in this report apply to the samples analyzed n accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 13 <br />