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r <br /> Gettler-11yan/Geostrategies(l) Project Tosco(1) <br /> rted <br /> 6747 Sierra Court,Suite J Project Number Unocal SS#08671 ° <br /> Dublin CA,94568 Project Manager Deanna Harding 02/15/01 13 12 <br /> Volatile Organic 8 Ozyganated Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting Spike Somme %PXC RPD <br /> Analyte Result limit Units Itvmel Result %REC Lis RPD Lmtt Notes <br /> _] <br /> Batch 1020009-EPA 5030B PPT <br /> Blank(1020009-BLKI) Prepared&Analyzed 02/02/01 <br /> Ethanol ND 1000 us/I <br /> 1,2-Dlbromoethane ND 200 " <br /> 1,2-Dichlometimm ND 200 " <br /> Di-isopropyl tea. ND 200 " <br /> Ethyl tert-butyl ether ND 200 " <br /> Methyl tent-butyl ether ND 200 " <br /> 7 crt amyl methyl ether ND 200 " <br /> Tort-butyl alcohol ND 100 " <br /> Surrogate 1,2 Dtchloroethane-d4 545 Soo 109 76-114 <br /> *(, 020009-BLK2) <br /> o Toluene-d8 511 " 500 102 88-110 <br /> Prepared&Analyzed 02/06/01 <br /> Ethanal ND 1000 ug/l <br /> l,2-Dibrotnoethane ND 200 " <br /> 1,2-Dichlomethaae ND 200 " <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 " <br /> Methyl tert-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Tcrt-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dichloroethane-& 516 500 103 76-114 <br /> Surrogate 7bluene-d8 500 500 100 88-110 <br /> LCS(1020009-BSI) Prepared&Analyzed 02/02/01 <br /> Methyl tert-butyl ether 529 200 ug/1 500 106 70-130 <br /> Surrogate 1,2 Dichloroethane-d4 551 500 110 76-114 <br /> Surrogate Toluene-d8 517 500 103 88-110 <br /> I <br /> equola Analytical-San Carlos The results in thts report apply to the samples analyzed in accordance with the chain of <br /> custody document Th;s analytical report must be reproduced to its entirety <br /> Page 9 of 13 <br />