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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX V (916) 21-0 00 <br /> www x <br /> atus Environmental project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Drive,Ste.550 Project Number: 548,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 06/24/02 16:34 <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 2060195-PPA 5030B [PIT] <br /> Blank(2060195-BLKI) Prepared&Analyzed: 06/17/02 <br /> Tert-butyl alcohol ND 5.0 ug/l <br /> Methyl tert-butyl ether ND 0.50 " <br /> Di-isopropyl ether ND 0.50 <br /> Ethyl tert-butyl ether ND 0.50 <br /> Tert-amyl methyl ether ND 0.50 " <br /> Ethanol ND 50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Surrogate:1,2-DCA-d4 27,4 25.0 110 60-140 <br /> LCS(2060195-BSI) Prepared:06/17/02 Analyzed: 06/18/02 <br /> Methyl tert-butyl ether 9.58 0.50 uel 10.9 88 60-140 <br /> Surrogate,-1.2-DCA-d4 27.1 11 25.0 108 60-140 <br /> Alfttrix.qpike(2060195-MSI) Source:5206184-07 Prepared:06/17/02 Analyzed: 06/18/02 <br /> thyl tert-butyl ether 9.91 0.50 ug/l 10.9 ND 91 60-140 <br /> Surrogate;1,2-DCA-d4 26.7 " 25.0 107 60-140 <br /> Matrix Spike Dup(2060195-MSD1) Source:5206184-07 Prepared: 06/17/02 Analyzed: 06/18/02 <br /> Methyl tert-butyl ether 9.53 0.50 ug/l 10.9 ND 87 60-140 4 25 <br /> Surrogate:1,2-DCA-d4 26.8 25.0 107 60-140 <br /> Batch 2060204-PPA 5030B [PIT] <br /> Blank(2060204-BLK1) Prepared&Analyzed: 06/18/02 <br /> Tert-butyl alcohol ND 5.0 ug/l <br /> Methyl tert-butyl ether ND 0.50 " <br /> Di-isopropyl ether ND 0.50 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Tert-amyl methyl ether ND 0"50 <br /> Ethanol ND 50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Surrogate:1,2-DCA-d4 27,7 25.0 111 60-140 <br /> uoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain oJ <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page Page 11 of 13 <br />