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1551 Industrial Road <br /> Sequoia San Carlos,CA 94070-4111 <br /> 4 (650)232-9600 <br /> Analytical FAX(650) 232-9612 <br /> Gettler-Ryan/Geostrategies(1) Project: Tosco(2) Sampled: 2/22/00 <br /> 6747 Sierra Court,Suite D Project Number: UNOCAL SS#11195 Received: 2/22/00 <br /> Dublin,CA 94568 Project Manager: Deanna Hardin R orted: 3/7/00 <br /> a �► '� � ,.,, na _ � a a ,. <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Batch: 0030008 Date Pre awed: 3/1/00 Extraction Method: EPA 5030B /T <br /> Blank 003000 <br /> Ethanol 3/1/00 ND ug/1 1000 <br /> Tert-butyl alcohol " ND 100 <br /> Methyl tent-butyl ether itND +, 2.00 <br /> Di-isopropyl ether " ND „ 2.00 <br /> Ethyl tert-butyl ether " ND it 2.00 <br /> Tert-amyl methyl ether " ND " 2.00 <br /> Surrogate: 1,2 Dichloroethane-d4 50.0 47.4 76.0-114 94.8 <br /> Blank 0030008-BLK2 <br /> Ethanol 3/2/00 ND t 1000 <br /> Tert-butyl alcohol if ND 100 <br /> Methyl tert-butyl ether " ND 2.00 <br /> propyl <br /> , ND 2.00 <br /> ether <br /> ND +, 2.00 <br /> %ayl tert-butyl ether " <br /> Tert-amyl methyl ether +' ND " 2.00 <br /> Surrogate: 1,2-Dichloroethane-d4 " 50.0 47.8 76.0-114 95.6 <br /> LCS 0030008-BSI <br /> Methyl tertbutyl ether 3/1/00 50.0 50.9 ug/1 70.0-130 102 <br /> Surrogate: 1,2-Dichloroethane-d4 50.0 47.3 76.0-114 94.6 <br /> LCS 0030008-BS2 <br /> Methyl tert-butyl ether 3/2/00 50.0 48.8 ug/l 70.0-130 97.6 <br /> Surrogate: 1.2 Dichloroethane-d4 50.0 45.4 " 76.0-114 90.8 <br /> Matrix Snike 00300 L002194-12 <br /> Methyl tert-butyl ether 3/2/00 50.0 ND 49.7 ug/1 60.0-140 99.4 <br /> Surrogate: 1,2 Dichloroethane-d4 " 50.0 47.6 76.0-114 95.2 <br /> Matrix S ike Duo 0030008-MSD1 1,002194-12 <br /> Methyl tert-butyl ether 3/2/00 50.0 ND 48.1 ug/l. 60.0-140 96.2 25.0 3.27 <br /> Surrogate: 1,2-Dichloroethane-d4 50.0 46.8 76.0-114 93.6 <br /> Sequoia Analytical-San Carlos *Refer to end of reportfor text of notes and definitions. <br /> Page 19 of 20 <br />