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Dad <br /> ' Sequoia 1551Carlos CA 4070 <br /> San Carlos CA 9407U <br /> Analytical (650)2329640 <br /> FAX(650)232 9612 <br /> www sequoialabs com <br /> ler-Ryan/Geastrategies(1) Project Unocal(4) <br /> 7Sierra Court,Suite J Project Number Former Unocal#15098& Montgmery Ward Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 03/26/02 12 44 <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 %RE.0 Limits RPD Limit Notes <br /> atch 2030017- EPA 5030B JP/TJ <br /> Blank(2030017-BLK2) Prepared&Analyzed 03/08/02 <br /> enzene ND 20 ug/l <br /> romobenzene ND 20 <br /> Bromochloromethane ND 20 " <br />�romodichloromethane ND 20 " <br /> romoform ND 20 <br /> Bromomethanc ND 5 0 <br /> -Butylbenzene ND 20 " <br /> c-Butylbenzene ND 20 <br /> ert-butylbenzene ND 20 " <br /> Carbon tetrachloride ND 20 " <br /> thlorobenzene ND 20 <br /> hloroethane ND 50 <br /> Chloroform ND 20 " <br /> 10methane ND 5 0 <br /> -rotoluene ND 20 <br /> 4-Chlorotoluene ND 20 " <br />�ibromochloromethane ND 2 0 <br /> 2-Dibromoethane ND 20 <br /> Dibromomethane ND 20 <br /> 2-Dibromo-3-chloropropane ND 50 " <br /> 2-Dichlorobenzene ND 20 <br /> " <br /> ,3-Dichlorobenzene ND 20 " <br /> 11]-Dichloroethane <br /> 4-Dichlorobenzene ND 20 " <br /> ichlorodifluommcthane ND 50 <br /> ND 20 " <br /> 1,2-Dichloroethane ND 20 " <br /> iI-Dichloroethene ND 20 <br /> s-1,2-Dichloroethene ND 20 <br /> trans-1,2-Dichloroethene ND 20 " <br />�2-Dichloropropane ND 20 <br /> 3-Dichloropropane ND 20 <br /> 2,2-Dichloropropane ND 20 " <br /> I-Dichloropropene ND 20 <br /> ND 20 " <br /> Hexachlorobutadiene ND 20 <br /> opropylbenzene ND 20 <br /> 111& <br /> a Analytical - San Carlos The i esults to this i eport 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 82 of 91 <br />