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404 N.Wiget lane <br /> Sequoia Walnut Creek,CA 94598 <br /> (925)988-9600 <br /> FAX(925)988-9673 <br /> Analyticalwwwse<,uoialabs.com <br /> I <br />! ettler Ryan,Inc.-Dublin' Project: Chevron <br /> ;6747 Sierra Court Suite J Project Number: Chevron#9-3232 Reported: <br /> Dublin CA,94568 Project Manager: Deanna L.Harding N 03-Aug-01 07:33 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT- Quality Control <br />{' Sequoia Analytical -Walnut Creek <br /> y <br /> Reporting Spike Source %REC RPD <br /> I'I Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1G20003-PPA 5030B PIT <br /> LCS 0G20003-BS1) Prepared&Analyzed:20-Jul-Ol <br />' Benzene 17.7 0.50 ugll 20.0 88.5 70-130 <br /> j Toluene 20.8 0.50 20.0 104 70-130 <br /> Ethylbenzene 20.6 0.50 20.0 103 . 70-130 <br /> Xylenes(total) 63.5 0.50 " 60.0 106 70-130 <br /> Surrogate:a,a,a-Trifluorotoluene 29.1 30.0 97.0 70-130 <br /> LCS(1G20003-BS2) Prepared&Analyzed:23-Jul-Ol <br /> is Benzene 21.5 0.50 ug/1 20.0 108 70-130 <br /> j Toluene 18.1 0.50 20.0 90.5 70-130 <br /> Ethylbenzene 17.2 0.50 20.0 86.0 70-130 -° <br /> Xylenes(total) 57.0 0.50 60.0 95.0 70-130 <br /> Surrogate:a,a.a-Triuorotoluene 29.9 30.0 99.7 70-130 <br /> L(IG20003-BS3) Prepared&Analyzed:24-Jul-01 f <br /> Benzene 1.8.7 0.50 ug/l .20.0 93.5 70-130 <br />` Toluene 18.3 4.50 20.0 91.5 70-130 <br /> Ethylbenzene 18.1 0.50 " 20.0 90.5 70-130 k <br /> Xylenes(total) 57.4 0.50 60.0 95.7 70-130 <br /> i Ft <br /> Surrogate:a,a,a-Trifluorotoluene 28.9 30.0 96.3 70-130 1 <br /> LCS(1G20003-BS4) Prepared&Analyzed:25-Jul-Ol <br /> Benzene 21.4 0.50 ugfl 20.0 I'9, 107 70-130 <br /> Toluene 17.8 0.50 20.0 89.0 70-130 <br /> Ethylbenzene 18.2 0.50 20.0 91.0 70-130 <br />` Xylenes(total) 55.6 0.50 60.0 92.7 70-130 <br /> Surrogate:a,a,a-Trifluorotoluene 28.2 30.0 94.0 70-130 <br /> f <br /> Matrix Spike(1G20003-MS1) Source:W107262-09 Prepared:20-Jul 01 Analyzed:25-Jul-01 <br /> Benzene 14.1 0.50 ug/1 20.0 ND 70.5 70-130 <br /> Toluene 16.6 0.50 20.0 ND:! 83.0 70-130 <br /> Ethylbenzene 16.0 0.50 20.0 ND'; 80.0 70-130 <br /> Xylenes(total) 52.7 0.50 60.0 ND 87.8 70-130 <br /> Surrogate:a,a,a-Triuorotoluene 27.4 30.0 91.3 70-130 <br /> u <br /> Sequoia Analytical-Walnut Creek The results in this reportl,,apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 6 of 10 <br /> t <br />