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Sequoia 15511riosC 94070 <br /> (i) San C(650 23 -9670 <br /> Analytical (650)232-9600 <br /> FA}C(650)232-9512 <br /> www sequoialabs cam <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-21D(L206021-26)Water Sampled 06/09/0212 40 Received 06/11/02 18 05 <br /> Styrene ND 2 0 ug/l 1 2060032 06/20/02 06/20/02 EPA 8260E <br /> 1,1,1,2-Tetrachloroethane ND 20 " " <br /> 1,1,2,2-Tetrachloroethane ND 2 0 <br /> Tetrachloroethene ND 2 0 " <br /> " <br /> Toluene ND 20 " <br /> 1,2,3-Trlchlorobenzene ND 2 0 ' <br /> 1,2,4-Tnehlorobenzene ND 2 0 " <br /> 1,1,1-Trichloroethane ND 20 " <br /> 1,I,2-Tnchloroethane ND 20 " <br /> Trichloroethene ND 2 0 1. " ^ <br /> Trichlorofluoromethane ND 5 0 <br /> 1,2,3-Trichloropropane ND 2 0 <br /> 1,2,4-Trimethylbenzene ND 2 0 <br /> 1,3,5-Tnmethylbenzene ND 2 0 " <br /> Vinyl chloride _ ND 2 0 " <br /> Total Xylenes ND 2 0 <br /> Surrogate 1,2-Dichloroethane-d4 107% 76-114 <br /> Suri agate Toluene-d8 100% 88-110 " <br /> Surrogate 4-BFB 916% 86-115 <br /> MW-22S(L206021-27)Water Sampled 06/09/_02 13 15 Received 06/11/02 18 05 <br />—Benzene ND 2 0 ug/l 1 2060032 06/20/02 06/20/02 EPA 8260B <br /> n n n n u n <br />—Bromobenzene_ ND _ 2 0.. _ <br />_ Bromochloramethane l ---- - T- T-- ND T 20 - <br /> Bromodichloromethane - - -- - -- -- --ND- =2 0- _"--- — - <br /> Bromofonn ND 2 0 <br /> Bromomethane ND 5 0 <br />—n-Butylbenzene_- - - _ - - -NP -- -- 2 0- <br /> sec-Butylbenzene ND 2 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 /> Dibromochloromethane ND 2 0 <br /> 1,2-Dibromoeth6nd - --- -- - -- -- ND-- w- -- 20 - <br /> Dibrornomethane ND 2 0 " <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 48 of 103 , <br />