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Sequoia 1551 Industrial Road <br /> San Carlos CA94070 <br /> 23 <br /> (650)232-96(1-9600 <br /> FAX- Analytical wwseq 0) labsi:12 <br /> www sequotalabs tom <br /> ler-Ryan/Geostrategies(1) Protect Tosco(1) <br /> Sierra Court,Suite J Project Number Tosco(former BP)#11192,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 03/01/02 13 39 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW_-5(L202098-05)Water Sampled 02/18/02 13 10 Received 02/19/02 07 40 _ <br /> Ethanol ND 500 ug/l 1 2020079 02/25/02 02/25/02 EPA 8260B <br /> 1,2-Dibromoethane ND 20 IF <br /> 1,2-Dichloroethane ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Tert-amyl methyl ether ND 2 0 IF IF " <br /> Tert-butyl alcohol ND 100 " " " " " IF <br /> Surrogate 12-Dtchloroethane-d4 109% 70-130 11IF <br /> 11 <br /> Surrogate Toluene-d8 982% 70-130 IF " IF <br /> MW-6(L202098-06)Water Sampled 02/18/02 16 20 Received 02/19/02 07 40 _ <br /> Ethanol ND 500 ug/1 1 2020077 02/22/02 02/22/02 EPA 8260E <br /> 1,2-Dibromoethane ND 2 0 " " " " <br /> 1,2-Dichloroethane ND 2 0 IF ItIt " <br /> DAMpropyl ether ND 20 " <br /> IF <br /> RW ert-butyl ether ND 2 0 " <br /> Methyl tert-butyl ether ND 2 0 IF <br /> Tert-amyl methyl ether ND 2 0 IFIF " <br /> Tert-butyl alcohol ND 100 " 1, " " <br /> Surrogate 1,2-Dtchloroethane-d4 106% 70-130 IF IF <br /> IF <br /> Surrogate Toluene-d8 101 % 70-130 " IF IF IF <br /> MW-7(L202098-07)Water Sampled 02/18/02 17 00 Received 02/19/02 07 40 <br /> Ethanol ND 62000 ug/l 125 2020079 02/25/02 02/25/02 EPA 826013 <br /> 1,2-Dibromoethane ND 250 1. 1. " 11 1. " <br /> 1,2-Dichioroethane ND 250 IF " " <br /> Di-isopropyl ether ND 250 IF IF " <br /> Ethyl tert-butyl ether ND 250 11 " <br /> Methyl tert-butyl ether 800 250 IF IF " <br /> Tert-amyl methyl ether ND 250 " " <br /> Tert-butyl alcohol 220000 12000 " <br /> Surrogate 1,2-Dtchloroethane-d4 111 % 70-130 IF " " IF <br /> Surrogate Toluene-d8 101 % 70-130 IF IF " <br /> 1a Analytical - San Carlos The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical i eport must be reproduced to its enure[), <br /> Page 7 of 14 <br />