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1 , <br /> ID (92Sequoia404 M Wiget Lane <br /> 5)9&�-96W <br /> Walnut Creek, CA 94598 <br /> %0 Analytical FAX(925)988-9673 Ryan,Inc -Dubhn Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#0187 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 09-Mir-00 10 44 <br /> Volatile Organic Compounds by EPA Method 8260A - Quality Control <br /> _ Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 0008023-EPA 5030B [PIT] - <br /> Blank(0008023-BLKI) Prepared&Analyzed 07-Mar-00 <br /> Ethanol ND 500 ugll <br /> tent-Butyl alcohol ND 100 " <br /> Methyl tent-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 " <br /> 1,2-Dichloroethane ND 20 " <br /> Ethylene dibronude ND 20 " <br /> Surrogate Dibromofluoromethane 520 Soo 104 50-150 <br /> Surrogate 11 Dichloroethane-d4 4&0 500 960 50-150 <br /> Blank(0008023-BLK2) Prepared&Analyzed 08-Mar-00 <br /> _ Ethanol_ _ _ _ _ ND 500 _ ug/l - <br /> tert-Butyl alcohol ND 100 " <br /> Methyl tett-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 ^ <br /> Fthvl tert-hutvl ether �n n <br /> - nett-Amyl methyl otherT - ---__-_ = ISD-- — � 20 O0 <br /> I,2-Dj*chloroethane_ —ND ____2o-- <br /> Ethylene dibronude ND 20 <br /> Surrogate Dibromofluoromeihane 610- - — -- - - " - 500 122 50.150 <br /> Surrogate 1,1-Dichloroethane-d4 590 500 118 50-150 <br /> Blank(0008023-BLK3) Prepared&Analyzed 09-Mar-00 <br /> Ethanol ND 500 ug,9 <br /> tent-Butyl alcohol ND loo " <br /> Methyl tertrbutyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tett-butyl ether ND 20 ` <br /> tett-Amyl methyl ether ND 20 " <br /> 1,2Dtchloroethane ND 20 " <br /> Ethylene dibromtde ND 20 <br /> Surrogate Dibromofluoromethane 0 Soo 50.150 <br /> Surrogate 1,2 Dtchloroethane-d4 0 500 50.150 <br /> Sequoia Analytical-Walnut Creek The results to duB report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report mus(be reproduced in its entire <br /> Page 20 of 22 <br />