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Poad <br /> Sequoia 1551 I los C ai 4070 , <br /> ,�DSan Carlos 23 -9600 <br /> Analytical (650)232-9600 <br /> FAX(650)232-9612 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategies(1} Project Unocal(4) <br /> 6747 Sierra Court, Suite J Project Number Former Unocal#5098, Stockton Reported <br /> Dublin CA, 94568 Project Manager Deanna Harding 07/01/02 07 46 ' <br /> Volatile Organic 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-I2 (L206021-14)Water Sampled-06/11/02 12 10 Received 06/11/02 18 05 w -_ <br /> Styrene ND 62 ugA 3 125 2060034 06/24/02 06/24/02 EPA 82608 <br /> 1,1,1,2-Tetrachloroethane ND 6 2 <br /> 1,1,2,2-Tetrachloroethane ND 62 <br /> Tetrachloroethene ND 6 2 <br /> Toluene ND 6 2 <br /> 1,2 3-TrlchlOTobenzene ND 6 2 <br /> 1,2,4-Tnchlorobenzene ND 6 2 <br /> 1,1,1-Trichloroethane ND 62 " ^ <br /> 1,1,2-Trichloroethane ND 62 <br /> Trichloroethene ND 6 2 " ^ <br /> Trichlorofluoromethane ND 16 <br /> 1,2,3-Trichloropropane ND 6 2 <br /> 1,2,4-Trimethylbenzene ND- 6 2 <br /> 1,3,5-Trimethylbenzene ND 6 2 <br /> Vinyl chloride- - ND s 6 2 <br /> Total Xylenes 170 6 2 <br /> Surrogate 1,2-Dichloroethane-d4 104% 76-114 " <br /> Surrogate Toluene-d8 101 % 88-110 ^ <br /> Surrogate 4-BFB 947% 86-11.5 " <br /> MW-13(L206021-15)Water Sampled 06/10/021050 Received 06/11/02 18 05 _ <br />^Benzene ND 2 0 ug/1 _ 1 2060032 06/21/02 0621/02 EPA 8260B ^ <br /> Bromobenzene ND 2 0 " <br /> Bromochloromethane - — ND� 20 <br />-Bromodichloromethane ND -2 0 _ <br /> Bromaform - — -_ _ __— —ND - - 2 0 - <br /> Bromomethane ND 5 0 ' <br /> n-Butylbenzene ND 2 0 " + <br /> sec-Butylbenzene - ND Z 0 <br /> Tert-butylbenzene ND 2 0 <br /> Carbon tetrachloride ND -2 0 <br /> Chlorobenzene ND 2 0 <br /> Chloroethane ND 5 0 <br /> Chloroform ND 2 0 <br /> Chloromethane ND 5 0 <br /> 2-Chlorotoluene ND 2 0 <br /> 4-Chlorotoluene ND 2 0 " <br /> Dibrorriochloromethane— ND 2 0 <br /> I;2-Dibromoethane-- - - __-- ND- — - 2 0 --- <br /> Dibromomethane ND 2 0 <br /> Sequoia Analytical -San Carlos The results in this report apply to the samples analyzed m accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety ' <br /> Page 30 of 103 ' <br />