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� I• <br /> 404 ld.Wiget Lane <br /> t. Walnut Geek,CA 94598 <br /> ' Sequoia (925)988-96DO <br /> FAX(925)988-9673 <br /> Analytical www.segUoWabs.com <br /> Gettler Ryan,Inc.-Dublin Project: Chevron <br /> 6747 Sierra Court Suite] Project Number: Chevron#9-4275 Reported: <br /> Dublin CA,94568 Project Manager: Deanna L-Harding 15-Mar-01 10:45 <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 1C04003 -EPA 5030B PIT <br /> Blank(1C04003-BLKI) Prepared&Analyzed:03-Mar-01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 <br /> Methyl tett-butyl ether ND 2.5 " <br /> Surrogate:a.a.a-Triiauororoluene 31.9 30.0 106 70-130 <br /> LCS(1C04003-BS1) Prepared&Analyzed:03-Mar-01 <br /> Benzene 18,7 0.50 ug/l 20.0 93.5 70-130 <br /> Toluene t9.5 0.50 20.0 97.5 70-130 <br /> E zene 20.2 0.50 20.0 101 70-130 <br /> (total) <br /> 60.6 0.50 60.0 101 70-130 <br /> Surrogate:aa.a-TriJluororoluene 31.4 30.0 105 70-130 <br /> Matrix Spike(lC04003-MSI) Source:W103066-02 Prepared&Analyzed:03-Mar-01 <br /> Benzene 17.8 0.50 ug/1 20.0 ND 89.0 70-130 <br /> Toluene 19.0 0.50 20.0 ND 95.0 70-130 <br /> Elhylbenzene 19.7 0.50 20.0 ND 98.5 70-130 <br /> Xylenes(total) 60.2 0.50 60.0 ND 100 70-130 <br /> Surrogate:A4a-TriJluorotoluene 29.4 30.0 98.0 70-130 <br /> Matrix Spike Dup(1C04003-MSD1) Source:W103066-02 Prepared &Analyzed:03-Mar-01 <br /> Benzene 18.7 0.50 ug/l <br /> 20.0 ND 93.5 70-130 4-93 20 <br /> Toluene 19.9 0.50 20.0 ND 99.5 70-130 4.63 20 <br /> Ethylbenzene 20.6 0.50 20.0 ND 103 70-130 4.47 20 <br /> Xylenes(total) 61.7 0.50 60.0 ND 103 70-130 2.46 20 <br /> Surrogate: a a TriJluarotoluene 31.4 30.0 105 70-130 <br /> The results in report apply to the samples analyzed in accordance with the chain of <br /> is Analytical-Walnut Creek <br /> custody document.This analytical report must be reproduced in its entirety. <br /> Page II of 14 <br />