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404 NWlget lane <br /> Sequoia Walnut Creek CA 94598 <br /> -- ��` - (925)988- <br /> FAX(925)9813-9673" <br /> Analytical www sequoialabs com <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal/Circle K# 1205 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 15-Nov-00 07 38 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> - - Sequoia Analytical -Walnut-Creek- — - ---- -- - <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunt Units Level Result %REC Lunits RPD Lutist Notes <br /> Batch OK01027-EPA 5030B []PITT <br /> Blank(OK01027-BLK2) Prepared&Analyzed 31-Oct 00 <br /> tart-Butyl alcohol ND 50 ug/i <br /> Methyl tett-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tort-butyl ether ND 20 " <br /> text-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofhroromethane 463 500 926 50-150 <br /> Surrogate 1 2-Duhloroerhane-d4 613 500 113 50-150 <br /> LCS(OK01027-BS2) Prepared&Analyzed 31-Oct-00 <br /> Methyl tert-butyl ether 576 20 ug/1 500 115 70-130 <br /> Surrogate Dibromofluoromethane 467 500 934 50-150 <br /> Surrogate 1,2 Dtchloroethane-d4 603 500 121 50-150 <br /> Sequoia AnalytlCal-Walnut Creek The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody doaumenr.Thos analytical report must be reproduced in its entrre <br /> Page 6 of 11 <br />