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1551 Industnal Road <br /> + Sequoia Carlos CA 94070 650)232 9600 <br /> Analytical ---- _-- __� _- - --_- _ - —_- _ T-- -_ -- - FAXNuoialabs62 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court,Suite J Project Number Tosco#5886,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 12/06/01 16 51 <br /> ....Volatile-Organic-8-Oxygen ate&Compo unds-by=EPA Method 8260B,-Quality Control— —_--__T <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte- _ Result - Limit Units Level Result %REC -Limits RPD Limit - Notes <br /> Batch 1110089-EPA 5030B IP/TJ <br /> Blank(1110089-BLK1) - ---� � -x�Prepared&Analyzed 11/26/01 <br /> Surrogate Toluene-d8 512 ug/l 500 102 70-130 <br /> Blank(1110089-BLK2) Prepared&Analyzed 11/28/01 <br /> Ethanol ND 500 ugll <br /> 1,2-Dibromoethane ND 10 <br /> 1,2-Dichloroethane ND 10 " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl ter(-butyl ether ND 1 0 " <br /> Tert-amyl methyl ether ND 10 " <br /> Teri-butyl alcohol ND 20 <br /> Surrogate 11-Dichloroethane-d4 253 250 102 70-130 <br /> Surrogate Toluene-d8 251 250 100 70-130 • <br /> LCS(1110089-BSI) Prepared&Analyzed 11/26/01 <br /> Methyl tert-butyl ether 480 1 0 ug/l 500 960 70-130 <br /> Surrogate 1,1-Drchloroethane-& 489 500 978 70-130 <br /> Surrogate Toluene-d8 514 500 103 70-130 <br /> LCS(1110089-BS2) Prepared&Analyzed 11/28/01 <br /> Methyl tert-butyl ether 561 10 ugA Soo 112 70-130 <br /> Surrogate 1 1-Dichloroethane-d4 265 250 106 70-130 <br /> Surrogate Toluene-d8 247 250 988 70-130 <br /> t <br /> Matrix Spike(1]10089-MS1) Source L]11140-15 Prepared&Analyzed 11/26/01 <br /> Methyl tert-butyl ether 469 1 0 ug/I 500 ND 93 6 60-140 <br /> Surrogate 12-Dichloroethane-d4 480 500 960 70-130 <br /> Surrogate Toluene-d8 513 500 103 70-130 <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 19 of 23 <br />