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Sequoia <br />Analytical <br />404 N WISet Lane <br />Walnut Creek, CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />OIL <br />ttler Ryan, hic -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 Reported <br />Dublin CA, 94568 Project Manager Barbara Siemmski 06 -Jan -00 17 03 <br />MTBE Confirmation by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />knalyte Result Limit Units Dilution Batch Prepared Analyzed Method Note. <br />SB246 (W912522-09) Soil Sampled 21 -Dec -99 11 45 <br />Received 23 -Dec -99 13 05 <br />Methyl tort -butyl ether 1 1 <br />010 <br />mg/kg 100 9L28013 03 -Jan -00 06 -Jan -00 EPA 8260A <br />Surrogate Dibromofluoromethane <br />104% <br />50-150 " <br />Surrogate 1 2-Dichloroethane-d4 <br />110% <br />50-150 " <br />MW5-46 (W912522-13) Soil Sampled 20 -Dec -99 13 05 <br />Received 23 -Dec -99 13 05 <br />Methyl tert-butyl ether 20 <br />010 <br />mg/kg 100 91.28013 03 -Jan -00 06 -Jan -00 EPA 9260A <br />Surrogate Dibromofluoromethane <br />800% <br />50-150 " <br />Sunogate 1,2-Dichloroethane-d4 <br />940% <br />50-150 " <br />VE346 (W912522-21) Soil Sampled 21 -Dec -991535 <br />Received <br />23 -Dec -99 13 05 <br />Methyl tert-butyl ether 68 <br />010 <br />mg/kg too 9L28013 03 -Jan -00 06 -Jan -00 EPA 8260A <br />Surrogate Dibromofluoromethone <br />960% <br />50-150 " <br />Surrogate 1,2-Diehloroethane-d4 <br />104% <br />50-150 " <br />VE4-54 (W912522-27) Soil Sampled 22 -Dec -991030 <br />Received <br />23 -Dec -99 13 05 <br />ethyl tett -butyl ether 57 <br />0 10 <br />mg/kg 100 9L28013 03 -Jan -00 06 -Jan -00 EPA 8260A <br />-8 <br />Surrogate Dtbromofluoromethane <br />100% <br />50-150 " <br />Surrogate 1,2-Dichloroethane-d4 <br />106% <br />50-150 " <br />Sequoia Analytical - Walnut Creek The results in this report apply to the smnples analyzed in axordance with the cAwn of <br />k—: custady document Thos analytical report must be reproducedin its entirety <br />Page 2 of 4 <br />