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o + <br /> 819 Striker Avenue Suite 8 <br /> qu®i r Sacramento CA 95834 <br /> f (916)921-9600 <br /> FAX(916)921-0 100 <br /> Analytical www sequoialabs com <br /> JAI <br /> Stratus Environmental Project ARCO 2169,Stockton,CA <br /> 3330 Cameron Park Drive, Ste 554 Project Number 2168,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 06/21/02 12 35 <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 2060166-EPA 5030B [P/TJ <br /> Blank(2060166-BLKI) Prepared&Analyzed 06/14/02 <br /> Tert-butyl alcohol ND 50 ug/l <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amy]methyl ether ND 050 " <br /> Ethanol ND 50 <br /> 1,2-D?chloroethane ND 050 " <br /> Surrogate 1 2-DCA-d4 280 112.50 112 60-140 T <br /> LCS(2060166-BSI) Prepared&Analyzed 06/14/02 <br /> Methyl tert-butyl ether 521 050 ug/l 545 96 60-140 <br /> rogate 12-DCA-d4 278 1, 250 111 60-140 <br /> Matrix Spike(2060166-MS1) Source S206169-03 Prepared&Analyzed 06/14/02 _ <br /> Methyl tert-butyl ether 545 050 ug l 545 ND 100 60-140 <br /> Surrogate 1 2-DCA-d4 293 " 2.50 117 60-140 <br /> Matnx Spike Dup(2060166-MSD]) Source S206169-03 Prepared&Analyzed 06/14/02 <br /> Methyl tert-butyl ether 559 050 ug/1 545 ND 103 60-140 3 25 <br /> Surrogate 12-DCA-d4 _ 299 " 250 120 60-140 <br /> Batch 2060204-EPA 5030B [PIT] <br /> Blank(2060204-BLK1) Prepared&Analyzed 06/18/02 <br /> Tert-butyl alcohol ND 50 ugll <br /> Methyl tert-butyl ether ND 050 <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> Ethanol ND 50 <br /> 1,2-Dichloroethane ND 050 " <br /> Surrogate 1 2-DCA-0 277 11 _ 250 111 60-140 <br /> Allk <br /> equola Analytical-Sacramento The results in this repo?1 apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical repoy t must be reproduced in its entirely <br /> Paye 9 of 12 <br />