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Sequoia 1551 Industnal Road <br /> San Carlos CA 94070 <br /> Analytical (650)232-9600 <br /> FAX(650)232-9612 <br /> www soquotalabs corn <br /> ettler-Ryan/Geostrategies(1) Project Unocal(4) <br /> Sierra Court, Suite J Project Number Former Unocal#5098, StocR-ton <br /> in CA,94568 Reported <br /> Project Manager Deanna Harding 07/01/02 07 46 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> KReporting <br /> alyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> -4 L206021-05 Water Sampled 06/10/02 17 25 Received 06/11/02 18 05 R-05 <br /> Dibromoethane ND 67 ug/I 667 2060021 06/13/02 06/13/02 EPA 8260E <br /> 1,2-Dichloroethane ND 67 " <br /> IF <br /> opropyl ether ND 67 <br /> tIyl <br /> tent-butyl ether ND 67 " IF tert-butyl ether ND 67 <br /> cert-amyl methyl ether ND 67 " <br /> -butyl alcohol ND 130 " <br /> ogate 1,2-Dichloroethane-d4 970% 70-130 ,. <br /> Surrogate Toluene-d8 994% 70-130 " <br /> IF <br /> -5 L206021-06 Water Sample 06/10/021402 Received-06/11/02 18 05 <br />, Dlbromoethane ND 10 ug/I 1 2060021 06/13/02 06/13/02 EPA 8260B <br />,2-Dichloroethane ND 10 " <br />* <br /> opropyl ether ND 10 <br /> 1 tert-butyl ether ND 10 " <br /> T „ <br /> Methyl tert-butyl ether ND 10 ^ <br /> t <br /> 1 methyl ether ND 10 " <br /> alcohol ND 20 <br /> urrogate 1 2-Dichloroethane-d4 108% 70-130 ^ <br /> agate Toluene-d8 996% 70-130 « <br /> -6 L206021-07 Water Sampled 06/10/02 14 25 Received 06/11/02 l8 05 <br /> 2-Dibromoethane ND l 0 ug/l 1 2060021 06/13/02 06/13/02 EPA 8260B <br /> ichioroethane ND 10 <br /> opropyl ether ND 1 0 " <br /> 1 tert-butyl ether ND I 0 • ,. <br /> ethyl tert-butyl ether 15 10 <br /> amyl methyl ether ND 10 ^ " <br /> butyl alcohol ND 20 <br /> rrogate 1,2-Dichloroethane-d4 101 % 70-130 ^ <br /> gate Toluene-d8 994% 70-130 I IF <br /> oia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br />' Page 65 of 103 <br />