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Sequoia 819 Sinker Avenue Suite 8 <br /> �r Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX(916)921 Analytical wwwsequotalabss co0m <br /> Stratus Environmental Project ARCO 6100,Tracy,CA <br /> 3330 Cameron Park Drive,Ste 550 Project Number 6100,Tracy, CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 10/21/02 17 45 <br /> BTEX 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 2090241 -EPA 5030B [P/TJ <br /> Blank(2090241-BLKl) Prepared&Analyzed 09/23/02 <br /> Ethanol ND 50 ug/l <br /> Tert-butyl alcohol ND 5 0 " <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Tert-amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 0 50 <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> Benzene ND 050 " <br /> Ethylbenzene ND 050 <br /> Toluene ND 050 <br /> Ves otal) ND 050 <br /> r.,'I'r.e(t(C6-C 10) ND 50 <br /> Surrogate Toluene-d8 244 250 98 60-140 A <br /> Surrogate 4-BFB 235 25 0 94 60-140 <br /> Surrogate 1 1-DCA-d4 259 250 104 60-140 <br /> LCS(2090241-BSI) _ Prepared&Analyzed 09/23/02 <br /> Methyl tent-butyl ether 245 050 ug/1 21 8 112 60-140 <br /> Benzene 146 050 134 109 70-130 <br /> Toluene 800 050 81 0 99 70-130 <br /> Gasoline(C6-C10) 1030 50 1100 94 70-130 <br /> Surrogate Toluene-d8 241 250 96 60-140 <br /> Surrogate 4-BF8 242 15 0 97 60-140 <br /> Surrogate 1 1-DCA-d4 258 250 103 60-140 <br /> Matrix Spike(2090241-MSI) Source 5209370-01 Prepared&Analyzed 09/23/02 <br /> Methyl tert-butyl ether 21 3 0 50 ug/l 21 8 ND 98 60-140 <br /> i <br /> Benzene 145 0 50 134 ND 108 70-130 <br /> Toluene 81 0 0 50 81 0 ND 100 70-130 <br /> Gasoline(C6-C10) 978 50 1100 ND 89 60-140 <br /> Surrogate Toluene-d8 246 250 98 60-140 <br /> Surrogate 4-BFB 240 250 96 60-140 <br /> Surrogate 12-DCA-d4 222 250 89 60-140 <br /> uoia 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 in its entirety <br /> Page 3 of 5 <br />