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Sequoia 1551 Industrial Road <br /> San Carlos CA 94070 <br /> Analytical (650)232-9600 <br /> FAX(650)232-9612 <br /> www sequoialabs com <br /> ettler-Ryan/Geostrategies(1) Project Unocal(4) <br /> Sierra Court, Suite J Project Number Former Unocal#5098, Stockton Reported <br /> n 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 />&- -] (L206021-02)eater Sampled 06/10/021530 Received 06/11/02 18 05 <br /> l3enzene 230 50 ug/l 25 2060034 06/24/02 06/24/02 EPA 8260B <br />*mobenzene ND 5 0 " +' <br /> mochloromethane ND 5 0 <br /> modichloromethane ND 5 0 <br /> Bromoform ND 5 0 <br /> fmomethane ND 12 <br /> utylbenzene ND 5 0 <br />,ec-Butylbenzene ND 5 0 <br /> 1I' -butylbenzene ND 5 0 <br /> bon tetrachloride ND 5 0 <br /> 10 114 <br /> ND 5 0 " <br />.hloroethane ND 12 <br /> troforrn ND 50 <br /> romethane ND 12 <br />-Chlorotoluene ND so <br />-fillorotoluenr ND 50 „ ^ <br /> 11mchlorom ND 50 <br />,23Wmoerhane ND 5 0 <br /> momethane ND 50 <br /> ibromo-3-chloropropane ND 12 <br /> fichlorobenzene <br /> ND 50 <br /> 3-Dichlorobenzene ND 50 <br /> ichlorobenzene ND 5 0 ^ „ <br /> lorodlfluoromethane ND 12 <br /> 1-Dichlorocthane ND 5 0 „ <br /> t(chloroethane ND 50 <br /> lchloroethene ND 5 0 <br /> ,2-Dichloroethcne ND 5 0 <br /> ins-1,2-Dlchloroethene ND 50 <br /> lichloropropane ND 5 0 <br /> ichloropropane ND 5 0 <br /> 2-Dichloropropane ND 5 0 <br /> Iclchloropropene ND 5 0 <br /> benzene 33 5 0 <br /> hlorobutadiene ND 5 0 <br /> tylene <br /> pylbenzene ND 5 Qropyltoluene ND 5 0 <br /> chloride ND 12 <br /> iphthalene 18 12 <br /> Pylbenzene ND <br /> quota 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 11 of 103 <br />