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404 N Wtget Lane <br /> Sequoia Walnut Greek, 94598 <br /> a- -N (925)98 8-960D <br /> FAX(925)988-9673 <br /> dw Analytical www sequoialabs com <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 10-Mdy-01 1124 <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 1D27011 -EPA 5030E McOH <br /> Blank(1D27011-BLKI) 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 tent-butyl ether ND 0 050 <br /> Surrogate a a a-Trilluorotoluene 0 630 0 600 105 40-140 <br /> LCS(1D27011-BSI) Prepared&Analyzed 27-Apr-01 <br /> Benzene 0 850 00050 mg/kg 0 800 106 50-150 <br /> Toluene 0 892 00050 0 800 112 50-150 <br /> 0 800 116 50-150 <br /> e(benzene 0 926 00050 nes(total) 277 00050 240 115 50-150 <br /> Surrogate a a a-Trifluorotoluene 0 780 0 600 130 40-140 <br /> I <br /> i <br /> uoia Analytical-Walnut Creek The reyults in tits report apply to the samples analyzed in accordance with the chane of <br /> custody document This analytical report must be reproduced in in erairety <br /> Page 10 of 12 <br />