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404 N Wight Fane <br /> Sequoia Walnut Geek.CA 94598 <br /> % <br /> (925)986-9fipp <br /> 4 FAX(925)988-9673 <br /> ID I Analytical wWWSCquolaldbsMm <br /> Gettler Ryan,Inc -Dublin Project Chevron <br />_ 6747 Sierra Court Suite J Project Number Chevron# 9-6171 Report Revised <br /> Dublin CA,94568 Project Manager De nna L-'Hanning 154Wa 01-08 OS� <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Repotting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Linnits RPD Lutist Notes <br /> Batch OK13020 Prepared 13-Nov-00 Using EPA 5030B[PIT] <br /> Blank(OK13020-BLKI) <br /> Ethanol ND 500 ug/1 <br /> tort-Butyl alcohol ND 50 " <br /> Methyl tart-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl teat-butyl other ND 20 " <br /> tori-Amyl mothyl ether ND 20 " <br /> Surrogate DibromoJluoromethane 230 250 920 50.150 <br /> Surrogate 1,2-Drchloroethane-d4 220 250 880 50-150 <br /> LCS(OK13020-BS1) <br /> Methyl tort-butyl ether 266 20 ug/1' 250 106 70-130 <br /> Surrogate Dibromofhcoromethaim 230 250 920 50-150 <br /> Surrogate 1 2-Dtchloroetherree-d4 210 230 840 50.150 <br /> Matra Spike(OK13020-Ml) Source W011215-01 <br /> Methyl tat-butyl ether _ 215 __ 20 ug/t 250 ND' _ X860 60-150 <br /> Surrogate Dibromofluoromethane 230- 250 910 50-150 _ <br /> Surrogate 1 2-Diehlor+oethane-d4 W - 22W0Y 2S0__ W J __880 50-150 <br /> Matra Spike Dup(OK13020-MSDI) Source W011215-01 <br /> Methyl tat-butyl attar 261 20 ug/l 250 ND 104 60-150 193 25 <br /> Surrogate Dibromofluor omethaie 240 250 960 50-ISO <br /> Surrogate 1 1 Dichloroedhone-d4 220 250 880 50.150 <br /> Sequoia Analytical-Walnut Creels This report represents a revision of the origind documem 71re results in this report app <br /> to the samples analyzed in accordance with the chain of awsiody document 77irs analyne <br /> report must be reproduced in its athreOMW <br /> Charlie <br /> estwater,WProject Maaager Page 7 of 8 <br />