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1551 Industrial Road <br /> San Carlos,CA 94470-4111 <br /> Sequoia 16501 232-9609 <br /> 4 FAX(650)Z32-9612 <br /> two Analytical www.sequolalabs.m <br /> Gettler-Ryan/Geostrategies(l) Project: Tosco(2) Sampled: II/13100 <br /> 6747 Sierra Court,Suite J Project Number: Unocal SSW 11195 Received: 11/13/00 <br /> Dublin,CA 94568 Project Manager: Deanna Harding Reported: 11/29/00 <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Batch: 01100'L7_ Date Prepared: 11/14/00 Extraction Method: EPA 5030B /T <br /> Blank 0110077 BLK1 <br /> Ethanol 11/14/00 NO u94 1000 <br /> Teat-butyl alcohol ND " 100 <br /> Methyl tort-butyl ether ND " 2.00 <br /> Di-isopropyl ether ND 2.00 <br /> Ethyl tert-butyl ether " ND 2.00 <br /> Tert-amyl methyl ether " ND 2.00 <br /> Surrogate: 1,2-Dichloroethane-d4 50.0 45.4 " 76.0-114 90.8 <br /> Blank 0110077-BLK2 <br /> Ethanol 11/17/10 ND ug11 1000 <br /> Tert-butyl alcohol " ND 100 <br /> Methyl tort-butyl ether " ND " 2.00 <br /> Di-isopropyl ether. ND 01 2.00 <: <br /> Ethyl teat butyl ether ND 2.00 <br /> Tert-amyl methyl ether ND " 2.00 <br /> .Surrogate: 1.2-Dichloroethane-d4 IF 50.0 49.5 " 76.0-114 99.0 <br /> Blank 0110077-BLK3 <br /> Ethanol 11/17/00 ND ugll 1000 <br /> Tert-butyl.alcohol 11ND it 100 <br /> Methyl tort-butyl ether it ND „ 2.00 <br /> Di-isopropyl ether " ND It 2.00 <br /> Ethyl tert-butyl ether " ND112.00 <br /> Tert-amyl methyl ether It ND It2.00 <br /> Surrogate: 1,2-Dichloroethane-d4 " 50.0 49.1 " 76.0-114 98.2 <br /> LCS 0110077-BSI <br /> Methyl tert-butyl ether 11/14/00 50.0 46.0 ug/l 70.0-130 92.0 <br /> Surrogate: 1,2 Dichloroethane-& 50.0 48.0 76.0-114 96.0 <br /> LCS 0110077BS2 <br /> Methyl tert-butyl ether 11/17/00 50.0 47.8 ug/1 70.0-130 95.6 <br /> Surrogate: 1,2-Dichloroethane-d4 " 50.0 49.6 IF 76.0-114 99.2 <br /> LCS 0110077-BS3 <br /> Methyl tort-butyl ether 11/17/00 50.0 39.5 ug/l 70.0-130 79.0 <br /> Surrogate. 1,7 Dichloroethane-d4 It 50.0 48.6 IF 76.0-114 97.2 <br /> Matrix Spike 0110077-MSI L011093-05 <br /> Methyl tent-butyl ether 11/14/00 50.0 ND 46.7 ug/l 60.0-140 93.4 <br /> Sequoia Analytical-San Carlos *Refer to end of reportfor text of notes and definitions. <br /> Page 17 of 19 <br />