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404 N Wiget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> 98 <br /> (925)988-9G00 <br /> 4 FAX(925)98&%73 <br /> a) Analytical WWW sequolaiabs corn <br /> (OW <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco# 11192 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 09-May-01 08 03 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Splice Source %REC RPD <br /> Analyte Result Lunit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1D27011 -EPA 5030B McOH <br /> Blank(1D27011-BLK1) Prepared&Analyzed 27-Apr-01 <br /> Purgeable Hydrocarbons ND 10 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Methyl tert-butyl ether ND 0 050 " <br /> Surrogate aga-Tnifluorotoluene 0 630 0 600 105 40-140 <br /> LCS(1D27011-BS1) Prepared&Analyzed 27-Apr01 <br /> Benzene 0 850 0 0050 mg/kg 0 800 106 50-150 <br /> WI <br /> ne 0 892 00050 0 800 112 50-150 <br /> benzene 0 926 00050 „ 0 800 116 50-150 <br /> Xylenes(total) 277 00050 240 115 50-150 <br /> Surrogate a,a,a-Tri luorotoluene 0 780 0 600 130 40-140 <br /> uola Analytical-Walnut Creek The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 6 <br />