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oad <br /> Sequoia on flos nalR70 <br /> San Carlos 23 94600 <br /> Analytical equoi 232 Syrmara <br /> FAX(656)232-9412 <br /> www sequoialabGettler-Ryan/GeostrategieS(1) Protect Unocal(4) <br /> 6747 Sierra Court, Suite J ProjectNumber Former Unocal#5098,Stockton Reported <br /> Dublin CA,94568 Project Managcr- Deanna Harding 07/01/02 07 46 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting--. - w <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-9(L206021-10)Water Sampled 06/10/020956 Received 06/11/0218 05 ' <br /> Styrene ND 20 ugll I -_2060034 06/21/02 06/21/02 EPA 8260B <br /> 1,1,1,2-Tetrachloroethane ND 20 " <br /> 1,1,2,2-Tetrachloroethane ND 20 <br /> Tetrachloroethene ND 20 " <br /> Toluene ND 20 <br /> 1,2,3-Tri chi orobenzene ND 20 ' <br /> 1,2,4-Trichlorobenzene ND 20 " <br /> 1,1,1-Trichloroethane ND 20 h „ ” <br /> 1,1,2-Trichloroethane ND 20 " <br /> Trichloroethene ND 20 ^ " <br /> Trichlorofluoromethane ND 5 0 <br /> 1,2,3-Trichloropropane ND 20 <br /> 1,2,4-Tntnethylbenzene ND 20 11 " <br /> 1 3,5-Trimethylbenzene ND 20 <br /> Vinyl chloride - ND - 20 <br /> Total Xylenes 23 20 " <br /> Surrogate 1,2-Dichloroethane-d4 110% 76--114 <br /> Surrogate Toluene-d8 991 % 88-110 " <br /> Ce,rrngnla d-RFR 90 3% R15-115 <br />�MW-10(L206021-11)Water Sampled 06/101021135 Received 06/11/02 18 05 <br /> Benzene ND 20 ug/I 1 2060032 06/20/02 06/21/02 EPA 8260B <br /> „ _ <br />—Bromobenzene- - � - - - - ND r - _2 0 -- <br /> Bromochloromethane ND 2 0 " " <br /> Bromodichloromethane - - --- _ ---ND- - 2 0- - <br /> Bromoform ND 2 0 <br /> Bromomethane ND 5 0 " <br />- n-Butylbenzene __ - ._ _ - _ _ _ ND 2 0 <br /> sec-Butylbenzene ND 2 0 " <br /> Teri-butylbenzene ND 2 0 " <br />- Carbon tetrachloride ND 2 0 <br /> Chlorobenzene ND 20 " " - <br /> Chloroethane ND 5 0 ' <br /> Chloroform ND 2 0 " <br /> Chloromethane ND 50 " <br /> 2-Chlorotoluene ND 2 0 " <br />- 4-Chlorotoluene _ _ ND 2 0 <br />- Dibromochlo_ N <br /> romethane ND 20 " <br /> 1,2-Dbromoethane -- - --- D- --- - 2 -- - - -- - -„ - - "- -- n --- --- - - <br /> Dibromomethane - ND 2 0 " <br /> AM <br /> Sequoia 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 24 of 103 ' <br />