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Sequoia 1551 nal/toad <br /> San Carlos <br /> CA 44070 <br /> (650)232-9600 <br /> z v1W Analytical FAXequoi labsc12 <br /> www sequocala6s com <br /> Der-Ryan/Geostratcgies(l) Project Tosco(1) <br /> Sierra Court,Suite J Project Number Tosco(Unocal)SS#6981 Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 121/27/0109 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-11L112085-08)Water Sampled 12/12/01 12 50 Received 12/13/01 19 40 _ <br /> Ethanol ND 500 ug/I 1 1120086 12/21/01 12/21/01 EPA 8260E <br /> 1,2-Dibromoethane ND 10 <br /> 1,2-Dichloroethane ND 10 " <br /> Di-isopropyl ether ND 1 0 <br /> Ethyl tert-butyl ether ND 1 0 <br /> Methyl tert-butyl ether 55 1 0 <br /> Teri-amyl methyl ether ND 10 <br /> Tert-butyl alcohol ND 20 " <br /> Surrogate 1,2-Dichloroethane-d4 854% 70-130 " <br /> Surrogate Toluene-d8 100% 70-130 " <br /> MW-15(L112085-09 Water Sampled 12/12/01 ll 25 Received 12/13/01 19 40 <br /> Ethanol ND 500 ugll 1 1120086 12/21/01 12/21/41 EPA 8260B <br /> 1,2-Dibromoethane ND 10 " <br /> 1,2-Dichloroethane 25 10 <br /> ropy]ether ND 10 <br /> ElWer-t-butyl ether ND 10 " <br /> Methyl tent-butyl ether 48 1 0 " <br /> Tert-amyl methyl ether ND 10 <br /> Tert-butyl alcohol ND 20 <br /> )uzi ogate 1,2-Dichloroethane-d4 864% 70-130 " <br /> Surrogate Toluene-d8 102% 70-130 " <br /> MW-16(L112085-10)Water Sampled 12/12/01 17 00 Received 12/13/01 19.40 <br /> Ethanol ND 1000 ug/I 2 1120078 12/20/01 12/20/01 EPA 8260B <br /> 1,2-Dibromoethane ND 20 " <br /> 1,2-Dichloroethane ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl terl-butyl ether ND 20 " <br /> Methyl teri-buivl ether 250 2 0 " <br /> Tert-amyl methyl ether ND 20 " <br /> Tert-butyl alcohol ND 40 " <br /> Surrogate 1,2-Dichloroethane-d4 800% 70-130 " <br /> Surrogate Toluene-d8 998% 70-130 " <br /> to 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 to its entirety <br /> Page 10 of 22 <br />