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1551 Industrial Road <br /> Sequoia San Carlos CA 94070 <br /> (D— Analytical (650)232 962 <br /> FAX(650)232_96112 <br /> www sequotelabs coin <br /> Gettler-Ryan/GeostrateRies(l) 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 /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Luntt Units Dilution- Batch Prepared Analyzed Method Notes <br /> 117W-10A (L206021-12)Water Sampled 06/10/02 12 00 Received 06/11/02 18 05 <br /> Benzene ND 2 0 ugA 1 2060032 06/20/02 06/21/02 EPA 8260B <br /> Bromobenzene ND - 2 0 <br /> Bromochioromethane ND 2 0 <br /> Bromodichlorom ethane ND 20 <br /> Bromoform ND 2 0 <br /> Brornomethane ND 5 0 <br /> n-Butylbenzene ND 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 /> Dibromochlorom ethane ND 2 0 " ^ " all <br /> 1,2-Dibromoethane ND 2 0 <br /> Dibromomethane ND 2 0 <br /> i,2-Dioromo-3-emoropropane NUJ 5 0 <br /> l 2-Dichlorobenzene ND 2 0 ^ <br /> 1,3-Dichlorobenzene ND 2 0 <br /> 1,4-Dichlorobenzene _ - - ND T-_-20_ - <br /> Dichlorodifluoromethane ND 50 <br /> 1,1-Dichloroethane- - - -- --ND- —2 0- -" - -- - --- -- -- ^ - -- <br /> 1,2-Dichloroethane ND 2 0 ^ ^ <br /> ],I-Dichloroethene ND 2 0 <br /> ciswl,2-Dichloroethene ND <br /> trans-l,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-Dichloropropene ND 2 0 <br /> Ethylbenzene ND 2 0 <br /> Hexachlorobutadiene ND 2 0 " ^ <br /> lsopropylbenzene ND 2 0 <br /> __p-lsopropyltoluene _ ND 2 0 <br /> Methylene chloride ND 5 0 <br /> W Naphthalene - - - - ND 50 <br /> _-- <br /> n-Propylbenzene ND 20 <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 26 of 103 ' <br />