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404 N Wlget Lane <br /> Walnut Creek,CA 94598 <br /> Sequoia (925)988-9600 <br /> FAX(925)988-9673 <br /> Analytical wwwsec,uofalabs com <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Smte 7 Project Number Tosco# 11194 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 13-Oct-00 16 26 <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 /> ,cyte Result Limit Umts Level Result %REC Liimts RPD Limit Notes <br /> Batch 0128008-EPA 5030B[PIT] <br /> Blank(0128008-BLK1) Prepared&Analyzed 28-Sep-00 <br /> Purgeable Hydrocarbons ND 50 u&4 <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert butyl ether ND 25 " <br /> Surrogate %a,a4liVuorotoluene 179 " 300 930 70-130 <br /> LCS(0128008-BS1) y - - Prepared&Analyzed 28-Sep-00 <br /> Benzene 189 0 50 ugll 200 945 70-130 <br /> Toluene 191 0 50 m 200 955 70-130 <br /> Ethylbenzene 193 W 0 50 200 96 5 - 70-130 <br /> Xylenes(total) 554 0 50 600 92 3 70-130 <br /> Surrogate g qa-Tnfhiorotoluem 288 300 960 70-130 <br /> LCS Dup(OI28008-BSD1) Prepared&Analyzed 28-Sep-00 <br /> Benzene _ _ 179 050 u&4 200 895 70-130 543 20 <br /> Toluene = - -- 181 0 50 200 90 5 70-130 5 38 20 - <br /> _- Ethylbenzene _-18 4_ - -0 50 2_0 0 --920-- 70-130_ .. 477 20 <br /> Xylenes(total) 529 0 50 600 982 70-130 462 _ 20 - <br /> Surrogate q q a-9hfhiorotoluene 276 --- '" - -- 30 0;_T - - '91 0----70-130 - - - e <br /> Sequoia Analytical-walnut Creek The results in this report apply to the samples analyzed in accordance with the nt chain <br /> custody documeThus analytical report must be reproduced in its entire <br /> Page 3 of 4 <br />