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404 N. <br /> Lane <br /> Sequoia WainCreek.CCAet94 <br /> (925)9889600 <br /> FAX(925)988-%73 <br /> Analytical www-sequoWab.mm <br /> Gettler Ryan,Inc.-Dublin Project: Chevron <br /> 6747 Sierra Court Suite J Project Number: Chevron#9-0557 Reported: <br /> Dublin CA,94568 Project Manager. Deanna L.Harding 30-Aug-00 16:41 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT-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 OH28002-EPA 5030B[PIT] <br /> Blank(OH28002-BLKl) Prepared&Analyzed:28-Aug-00 <br /> Purgeable Hydrocarbons ND 50 UVI <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> XYlenes(totI) ND 0.50 " <br /> Methyl tort-butyl ether ND 2.5 " <br /> Surrogate:aao-Tnfluorotohtene 31.9 " 30.0 106 70-130 <br /> LCS(OH28002-BSI) Prepared&Analyzed:28-Aug-00 <br /> Benzene 19.4 0.50 ug4 20.0 97.0 70-130 <br /> Toluene 19.7 0.50 20.0 98.5 70-130 <br /> Ethylbenzene 19.8 0.50 20.0 99.0 70-130 • <br /> Xylenes(total) 56.9 0.50 60.0 94.8 70-130 <br /> Swrogate:as o-Tr luomroluene 29.7 30.0 99.0 70-130 <br /> Matrix Spike(OH28002-MSI) Source:W008429-05 Prepared&Analyzed:28-Aug-00 <br />-Benzene 19.1 0:50�ugli 20.0 ND 95.570-130 <br /> Toluene 19.2 0.50 20.0 ND 96.0 70-130 <br /> &hylbenzeno 19.5 0.50 20.0 ND 97.5 70-130 <br /> Xylenes(tow) 56.5 0.50 60.0 ND 94.2 70-130 <br /> Surrogate:a4a-Trif4torotohtene 26.6 30.0 887 70-130 <br /> Matrit Spike Dup(OH28002-MSD1) Source:W008429-05 Prepared&Analyzed:28-Aug-00 <br /> Berme 19.7 0.50 U94 20.0 ND 98.5 70.130 3.09 20 <br /> ,4Tohwm 19.6 0.50 20.0 ND 98.0 70-130 2.06 20 <br /> Ethylba,zeule 19.5 0.50 " 20.0 ND 97.5 70-130 0 20 <br /> Xylenes(total) 56.3 0.50 60.0 ND 93.8 70-130 0.355 20 <br /> Surrogate:44% -7Ylfluorotoluene 27.3 " 30.0 91.0 70-130 <br /> Sequoia Analytical-WaIAUt Creek The msuits in dds report apply to the samples mudyied in accordmw with the chain <br /> custody document. This ana!ydcal report must be repnodieced in its emirety. <br /> Page 9 of 10 <br />