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r <br /> 404 N Wiget lane <br /> Sequoia Walnut Geek,CA <br /> 94598 <br /> (925)988-9600-%W <br /> 4 CD <br /> FAX(925)98$-%73 <br /> wo Analytical '"`"""' u°'� corn <br /> er Ryan,Inc -Dubhn Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco It 5886 Reported <br /> Dublin CA,94568 Project Manager Deannal, Harding 28-Feb-01 07 25 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creep <br /> Reporting <br /> Analyte Result Lumt Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-8I(W 102175-14)Water Sampled 05-Feb-01 12 22 Received 07-Feb-01 16 40 <br /> Ethanol ND 500 ug/l 1 1B13024 14-Feb-01 14-Feb-01 EPA 826013 <br /> tent-Butyl alcohol ND 50 " <br /> Methyl tent-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " <br /> tent-Amyl methyl ether ND 20 <br /> 1,2-Dichloroethane ND 20 " <br /> Ethylene dibrormde ND 20 <br /> Surrogate Dibromofluoromethane 118% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 113 % 50-150 " <br /> MW-81) (W102175-15)Water Sampled 05-Feb-01 11 53 Received 07-Feb-01 16 40 <br /> Ethanol ND 500 ugll 1 1B13024 14-Feb-01 14-Feb-01 EPA 8260E <br /> tert-Butyl alcohol ND 50 " <br /> Methyl tert-butyl ether ND 20 <br /> � <br /> opropyl ether ND 20 ^ <br /> tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 <br /> 1,2-Dichloroethane ND 20 <br /> Ethylene dibromnde ND 20 " <br /> Surrogate Dibrarttofluoromethane 115% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 106% 50-150 " <br /> MW-9S(W102175-16)Water Sampled 05-Feb-01 14 38 Received 07-Feb-01 16 40 <br /> Ethanol ND 500 ugi 1 1B13024 14-Feb-01 14-Feb-01 EPA 8260B <br /> tert-Butyl alcohol ND 50 <br /> Methyl tert-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 „ <br /> tert-Amyl methyl ether ND 20 <br /> 1,2-Dichloroethane ND 20 " <br /> Ethylene dibrorrude ND 20 " <br /> Surrogate Dtbromofluoromethane 120% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 114% 50-150 " <br /> Sequoia Analytical-Walnut Creeds The results in flus report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical reporl must be reproduced to its entirety <br /> • <br /> Page 6 of 29 <br />