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J <br /> 404 N Wiget Lane <br /> Sequoia Walnut Creek,9CA 80 <br /> a4_ _� FAX(925)988-%73 <br /> Analytical www sequolalabs corn <br /> ve- - <br /> jenier yan,Inc -Dublin Project Tosco <br /> )747 Sierra Court Suite 3 Project Number Tosco 4 4409 Reported <br /> 7ubhn CA,94568 Project Manager Deanna L Harding 06-Feb-01 17 21 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFF - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> analyte Result Limit Units Level Result %REC Limits RPD Lunn Notes <br /> atch 1020021-EPA 5030B(P/') <br /> lank(1020021-BLKI) Prepared&Analyzed 02-Feb-01 <br /> irgeable Hydrocarbons ND 500 ug/l <br /> .nzene ND 0 500 " <br /> oluene ND 0 500 " <br /> hylbenzene ND 0 500 " <br /> ylenes(total) ND 0 500 <br /> lethyl tert-butyl ether ND 250 " <br /> rrrogale a aa-TrrJluoroioluene 973 100 973 60-140 <br /> ,CS(1020021-BSI) Prepared&Analyzed 02-Feb-01 <br /> enzene 907 0 500 ug/1 100 907 70-130 <br /> oluene 907 0 500 100 907 70-130 <br /> thylbenzene 909 0 500 100 909 70-130 <br /> `yl tai} 27 1 0 500 300 903 70-130 <br /> lethy -butyl ether 810 250 100 810 70-130 <br /> arrogate qqa-Triluorotoluene 983 100 983 60-140 <br /> Aatrix Spike(1020021-MSX) Source 5102012-06 Prepared.&Analyzed 02-Feb-01 <br /> 3enzene 139 0 500 ug/l 100 ND 139 60-140 <br /> "oluene 9 73 0 500 100 ND 973 60-140 <br /> .thylbenzene 900 0 500 10 0 ND 900 60-140 <br /> xylenes(total) 269 0 500 300 ND 897 60-140 <br /> ,tethyl tent-butyl ether 100000000 250 100 000000000 60-140 Q-03 <br /> iurrogare aqa-Trtfhrororoluene 23 7 100 237 60-140 S-02 <br /> Ylatrix Spike Dup(1020021-MSDI) Source 5102012-06 Prepared&Analyzed 02-Feb-01 <br /> Benzene 135 0 500 ng/1 100 ND 135 60-140 2 92 25 <br /> Toluene 947 0 500 100 ND 947 60-140 271 25 <br /> Ahylbenzene 877 0 500 100 ND 877 60-140 259 25 <br /> ,Yylenes(total) 266 0 500 300 ND 887 60-140 112 25 <br /> Nfethyl Cert-butyl ether 100000000 250 100 000000000 60-140 0 25 Q-03 <br /> Surrogate qqa-Trtfluorotohtene 22 7 100 227 60-140 9-02 <br /> SeC�uQa Analytical-Walnut Creek The results in ihts report apply to the samples analyzed in accordance with the churn of <br /> . custody documenL This anolytical report must be reproduced to its entirely <br /> Page 11 of 12 <br />