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Sequoia San an Carlos InosCAlRoad <br /> 94070 <br /> Analytical FAX(650)23 29(,02 <br /> (650)232 9622 <br /> www sequoialabs cam <br /> Gettler-Ryan/Geostrategies(l) 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,- Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %RFC Limits RPD Limit Notes , <br /> Batch 2060032- EPA 5030B 1P/T] <br /> Blank(2060032-BLK2) Prepared&Analyzed 06/21/02 <br /> trans-l,2-Dichloroethene ND 20 ug/l ' <br /> 1,2-Dichloropropane ND 20 " <br /> 1,3-Dichloropropane ND 20 " <br /> 2,2-Dichloropropane ND 20 <br /> 1,1-Dichloropropene ND 20 " <br /> Ethylbenzene ND 20 " <br /> 1•cxachlorobutadienc ND 20 <br /> Isopropyl benzene T ND 20 " <br /> p-Isopropyltoluene ND 20 <br /> _Methylene chloride ND <br /> Naphthalene ND 50 " <br /> n-Propylbenzene ND 20 " <br /> Styrene - ND 20 <br /> I,1 1,2-Tetrachloroethane ND 20 <br /> 1,1,2,2-Tetrachloroethane ND 20 <br /> Tetrachloroethene ND 20 " <br /> ol <br /> 1,2,3-Triehlorobenzene ND 20 _ <br /> 1 2,4-Trichlorobenzene T ND 20 - <br /> _.1,1,1-Trichloroethane - - -- -- --------=ND--20 --- <br /> _ 1,1,2-Trichloroethane ND 20 " <br /> -Trichloroethene - - - - - -- ------ND- - -- 2 0- -" - - -- — - � -- - - --- - - -- - <br /> Trichlorofluoromethane ND so e <br /> 1,2,3-Trichloropropane ND 20 " <br /> —1,2,4-Trimethylbenzene- -ND- T - 20 <br /> 1,3,5-Trimethylbenzene ND 20 <br /> Vinyl chloride ND 20 " <br /> Total Xylenes ND 20 " <br /> Surrogate 1,2-Dichloroethane-d4 106 100 106 76-114 ' <br /> Surrogate Toluene-d8 102 100 102 88-110 <br /> Surrogate 4-BFB 906 100 906 86-115 <br /> Sequoia Analytical-San Carlos The results to this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 88 of 103 , <br />