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404 N Wiget Lane <br /> Sequoia <br /> Walnut C(925)988 496080 <br /> J FAX(925)988-%73 <br /> Analytical www sequoialabs corn <br /> aw <br /> Gettler Ryan, Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite 1 Project Number Tosco# 11192 Reported <br /> Dublin CA, 94568 Project Manager Doug Lee 24-Aug-01 09 09 <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 1 H17004-RPA 5030B McOH <br /> Blank(1H17004-BLKI) Prepared 10-Aug-01 Analyzed 17-Aug-01 A-01 <br /> Purgeable Hydrocarbons ND _ 10 mg/kg <br /> Benzene ND 0 0050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Methyl ter(-butyl ether(MTBE) ND 0 050 " <br /> Surrogate a a a-Tris luorotoluene 0 00 0 600 40-140 - <br /> Blank(IH17004-BLK2) Prepared&Analyzed 17-Aug-01 <br /> Purgeable Hydrocarbons ND 1 0 mg/kg <br /> ,zine ND 00050 <br /> ene ND 00050 <br /> Ethylbenzene ND 00050 <br /> Xylenes(total) ND 00050 " <br /> Methyl tert-butyl ether(MTBE) ND 0 050 " <br /> Surrogate a a a-Triuorotoluene 0 596 0 600 993 40-140 <br /> LCS(1H17004-BSI) Prepared 10-Aug-01 Analyzed 17-Aug-Ol <br /> Benzene 0 678 00050 mg/kg 0 800 848 50-150 <br /> Toluene 0 720 00050 0 800 900 50-150 <br /> Ethylbenzene 0 748 00050 0 800 93 5 50-150 <br /> Xylenes(total) 226 00050 2 40 942 50-150 <br /> Surrogate a a a-Trafluorotoluene 0 642 _- " 0 600 107 40-140 <br /> LCS(lHl7004-BS2) Prepared&Analyzed 17-Aug-01 <br /> Benzene 0 716 0 0050 mg/kg 0 800 995 50-150 <br /> Toluene 0 756 00050 0 800 945 50-150 <br /> Ethylbenzene 0 794 00050 0 800 992 50-150 <br /> Xylenes(total) 236 00050 240 983 50-150 <br /> Surrogate a a a-Trrfluorotoluene 0 586 0 600 977 40-140 <br /> uoia Analytical - Walnut Creek The results in this report 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 8 of 11 <br />