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Sequoia 1551 Industrial Road <br /> IDSan Carlos,CA 94070-4111 <br /> m„p Analytical (650)232-9600 <br /> FAX(650) 232-9612 <br /> `.:.Ctler-Ryan/Geostrategies(1) Project: Tosco(1) Sampled: 5/20199 <br /> 6747 Sierra Court,Suite D Project Number: Unocal SS#11195 Received: 5/20/99 <br /> Dublin,CA 94568 Project Manager: Deanna Harding Reported: 6/3/99 <br /> Volatile Organic.Oxygenated Com ouhiis b EPA Method 8260A/ utak Control <br /> P Y Q tY ` <br /> Sequoia Analytiical-San Carlos <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Blank(continued) 9060001-BLKI <br /> Tert-amyl methyI ether 6/1199 ND ug/l 2.00 <br /> Surrogate: 1,2-Dichloroethane-d4 50.0 52.7 76.0-114 105 <br /> LCS 9060001-BS1 <br /> Methyl tert-butyl ether 611/99 50.0 52.0 ug/l _ 70.0-130 104 <br /> Surrogate: 1,2-Dichloroethane-d4 1150.0 J 53.9 76.0-114 108 <br /> Matrix Spike 9060001-MSI L905556-02 <br /> _Methyl ten-butyl ether 6/1199 50.0 ND 52.6 ug/l 60.0-140 105 <br /> Surrogate: 1,2-Dichloroethane-d4 " 50.0 52.9 76.0-114 106 <br /> Matrix Spike Dup 9060001-MSD1 L905556-02 <br /> Methyl tert-butyl ether 6/1/99_ 50.0 ND 51.6 ug/l 60.0-140 103 25.0 1.92 <br /> Surrogate: 1,2-Dichloroethane-d4 50.0 52.6 76.0-114 105 <br /> %1ch: 9060010 Date Prepared: 612199 Extraction Method: EPA 5030B IP/T1 <br /> `:Mink 9060010-BLKI <br /> Ethanol 6/2/99 ND ug/l 1000 <br /> Tert-butyl alcohol ND " 200 <br /> Methyl tert-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 48.9 76.0-114 97.8 <br /> Blank 9060010-BLK2 <br /> Ethanol 612199 ND ug/l 1000 <br /> Tert-butyl alcohol ND 1200 <br /> Methyl tert-butyl ether ND 12.00 <br /> Di-isopropyl ether ND IN 2.00 <br /> Ethyl tent-butyl ether " ND " 2.00 <br /> 'Pert-amyl methyl ether " ND " 2.00 <br /> Surrogate: 1,2-Dichloroethane-d4 50.0 48.2 76.0-114 96.4 <br /> LCS 9060010-BS1 <br /> Methyl tert-butyl ether _ 612199 50.0 62.2 ug/l 70.0-130 124 <br /> Surrogate: 1,2-Dichloroethane-d4 " 50.0 56.3 " 76.0-114 113 <br /> i <br /> LCS 9060010-BS2 <br /> Methyl ter-butyl ether 612/99 50.0 53.6_ ug/l 70.0-130 107 <br /> Surrogate: 1,2 Dichloroethane-d4 If 50.0 49.4 " 76.0-114 98.8 <br /> voia Analytical-San Carlos *Refer to end of report for text of notes and def nilions. <br /> I <br /> i <br /> Page 17 of 19 i <br />