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* 155]Industnal Road <br /> Sequoia San Carlos CA 94070 <br /> (650)232 9600 <br /> Analytical FAX(650)232-9612 <br /> WWW sequocaiabs com <br /> Gettler-RyanlGeostrategieS(1) Project Unocal(4) <br /> 6747 Sierra Court, Suite 3 Project Number Former Unocal#5098,Stockton Reported <br /> Dublin CA, 94568 Project Manager Deanna Harding 07/01/02 07 46 <br /> J <br /> Volatile Organic Compounds by EPA Method 8260B Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-14A (L206021-17)Water Sampled_06/10/02 10 15 Received 06/11/02 1S 05 r <br /> 1,2-Dibromo-3-chloropropane - ND 50 ug/l 3 1 2060032 06/2I/02 06/21/02 EPA 8260E <br /> 1,2-Dichlorobenzene ND 2 0 " <br /> 1,3-Dichlorobenzene ND 2 0 <br /> 1,4-Dichlorobenzene ND 2 0 <br /> " " ^ <br /> Dichlorodifluoromethane ND 5 0 <br /> IJ-Dichloroethane ND 2 0 " <br /> 1,2-Dichloroethane ND 2 0 " <br /> l,I-Dichloroethene ND 2 0 ^ ^ <br /> cis-1,2-Dichloroethene ND 2 0 <br /> trans-1,2-Dichloroethene ND 2 0 " ^ <br /> 1,2-Dichloropropane ND 2 0 ^ <br /> 1,3-Dichloropropane ND 2 0 <br /> 2,2-Dichloropropane ND 2 0 <br /> 1,1-Dlchloropropene ND 2 0 <br /> Ethylbenzene ND 20 <br /> Hexachlorobutadiene ND 2 0 <br /> I sopropy I benzene ND 20 " <br /> p-Isopropyltoluene ND 20 <br /> Methylene chloride ND 5 0 <br /> Naphthalene ND 50 <br /> =n-Propylbenzene — ND— —2 0 ^ , -- <br /> Styrene ND 20 <br /> --1,1,1,2-Tetrachloroethane __ _-- ----ND-- ----2 0—_ <br /> _ 1,1,2,2-Tetrachloroethane ND 20 ^ <br /> -Tetrachloroethene--- -- - - —ND,- -_- —2 0 - __— <br /> Toluene ND 20 " <br /> 1,2,3-Trichlorobenzene ND 20 ^ <br /> -_l,2,4-Trtchlorobenzene-- ND_ -20- __ <br /> 1,1,1-Trichloroethane ND 2 0 <br /> 1,I,2-Trichloroethane ND 20 " <br /> Trichloroethene - - ND 2 0 - <br /> Trichlorofluoromethane ND 5 0 ^ ' <br /> 1,2,3-Trichloropropane ND 20 <br /> I,2,4-Triinethylbenzene ND 2 0 " <br /> 1,3,5-Trtmethylbenzene ND 20 " <br /> Vinyl chloride ND 20 <br /> Total Xylenes ND 20 <br /> Surrogate_1,2-Dichloroethane-d4 _ _ __ _ _ _ 109% _ 76-114 <br /> Surrogate Toluene-d8 100% 88-110 " <br /> Surrogate 4-BFB 889% 86-115 " <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 34 of 103 ' <br />