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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 <br /> FAX(925)988-9673 <br /> Analytical - wwwsequolalabs corn <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite jr Project Number Chevron#9-9840 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 06-Jun-01 08 21 <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 Lunn Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1E29003-EPA 5030B PIT <br /> Blank(I E29003-BI-KI) Prepared&.Analyzed 29-May-Ol <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl Cert-butyl.ether ND 2 5 " <br /> Surrogate asa-Tnfluorotoluene 359 300 120 70-130 <br /> Blank(1E29003-BLK2) Prepared&Analyzed 30-May-01 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 0 50 " <br /> eND 0 50 <br /> enzene ND 050 <br /> Xylenes(total) ND 0 50 <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Trifluorotoluene 303 300 101 70-130 <br /> LCS(1E29003-BS1) Prepared&Analyzed 29-May-01 <br /> Benzene 171 0 50 4/1 200 855 70-130 <br /> Toluene 188 050 200 940 70-130 <br /> Ethylbenzene 179 050 200 895 70-130 <br /> Xylenes(total) 587 050 600 978 70-130 <br /> Surrogate a a a-Tnfluorotoluene 279 300 930 70-130 <br /> LCS(IE29003-BS2) Prepared&Analyzed 30-May-01 <br /> Benzene 23 5 0 50 ug/L 200 118 70-130 <br /> Toluene 184 0 50 200 920 70-130 <br /> Ethylbenzene 178 0 50 200 890 70-130 <br /> Xylenes(total) 578 0 50 600 963 70-130 <br /> Surrogate a a a-Trifluorololuene 292 300 973 70-130 <br /> I <br /> la Analytical-Walnut Creels The results in fits report apply to the samples analyzed to accordance with the chain of <br /> custody documew This analytical report must be reproduced in its entirety <br /> Page 6 of 12 <br />