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1551 Industnal Road , <br /> a_ _� Sequoia San Carlos CA 94070 <br /> Analytical (650)232 9600 <br /> FAX(650}232-9612 <br /> www sequotalabs com <br /> Gettier-Ryan/Geostrategies(l) Project Unocal(4) <br /> 6747 Siena 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 /> w Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD - - <br /> Analyte Result Limit Units Level Result %REC Limits RPD Lunt Notes <br /> Batch 2060034-EPA 5030B [PIT] <br /> Blank(2060034-BLK2) Prepared&Analyzed 06/24/02 w <br /> Benzene ND 20 ug/l ' <br /> Bromobenzene ND 20 " <br /> Bromochloromethane ND 2 0 " <br /> Brornodichloromethane ND 2 0 <br /> Bromeform ND 20 <br /> Brornomethane ND 50 " <br /> n-Butylbenzene ND 2 0 <br /> sec-Butylbenzene ND 20 " <br /> Teri-butylbenzene ND 2 0 " <br /> Carbon tetrachloride ND 2 0 - - <br /> Chlorobenzene ND 2 0 " <br /> Chloroethane ND 50 " <br /> Chloroform - "J ND 2 0 " <br /> Chlaromethane ND 5 0 <br /> 2-Chlorotoluene ND 2 0 " <br /> 4-Chlorotoluene ND 2 0 " <br /> T L - 1..- L....._ <br /> ,, owwu,w omc dhauc ND 2 0 <br /> 1,2-Dtbromoethane _ ND 2 0 <br /> Dibromomethane ND 2 0 <br /> _1,2-Dibromo-3-chloropropaneTT- ;- _ -=ND__r -T - S 0_ . „ <br /> 1,2-Dichlorobenzene ND 2 0 " <br /> 1,3-Dichlorobenzene ND - 2 0- - - <br /> 1,4-Dichlorobenzene ND 2 0 <br /> Dichlorodifluoromethane ND 5 0 " <br /> 1;1-Dichloroethane- w _ __ -ND y -20 <br /> 1,2-Dichloroethane ND 2 0 <br /> I,I-Dichioroethene ND 2 0 " <br /> cis-1,2-Dichloroethene ND 2 0 " <br /> trans-l,2-Dichloroethene ND 2 0 , <br /> 1,2-Dichloropropanc ND 2 0 " <br /> 1,3-Dichloropropane ND 2 0 " <br /> 2,2-Dichloropropane ND 2 0 <br /> l,I-Dichlorapropene ND 20 ^ <br /> Ethylbenzene ND 2 0 " <br /> - 1-lexachlorobutadiene - - " - - - - ND -20 <br /> - <br /> Isopropylbenzene 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 92 of 103 ' <br />