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S E <br /> Sequoia' hC <br /> 404 N A Lane <br /> Walnut Creek CA 94598 <br /> --.•,- - : - -- - --- ---, FAX(925)988- <br /> Analytical v 9673 <br /> sequoealahs nom <br /> Gettler Ryan,Inc -Dublin Y x Project' Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco# 111941, Reported <br /> Dublin CA,94568 Project Manager Doug Lee t , 01 Jun-OI"18 16 <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 1E31003-EPA 5030B PIT'r <br /> Blank(1E31003-BLKI) Prepared&Analyzed 31-May-01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 r <br /> Surrogate a a a-Tnflucrotoluene - 290 300 967 70-130- <br /> LCS(I)&31003-BS1) Prepared&Analyzed 31-May-01 <br /> Benzene 214 050 ug/I 200 107 70-130 <br /> Toluene 181 050 200 905 70-130 <br /> Ethylbenzene _ _ 185 - 050 200 925 - 70-130 <br /> Xylenes(total) 551 0 50 600 91 8 70-130 . <br /> Surrogate a q a-Trifluorotoluene 300 300 100 70-130 <br /> LCS Dup (IE31003-)3SDI) Prepared&Analyzed 31-May-01 <br /> Benzene 244 050 ug/I 200 122 70-130 131 20 <br /> Toluene = — - _ -_ -_ _ -=-194==T==-050-=- ---- -- 200 — - 970-=70=130 693 __-20- <br /> - <br /> Ethylbenzene 19 0 050 200 95 0 70-130 267 20 <br /> Xylenes(total) - W -- - - ' S9 5 -- 099 2�- 70=130 - 7 68 20� <br /> Surrogate a,a a-Tnfluorololuene _19 0_ _n __ _300- _ : 96 7� x.....70-130 _ - _ - <br /> Matrix Spike(1E31003-MSI) Source W105543-04 Prepared&Analyzed 31-May-OI <br /> Benzene 10 9 050 ug/1 200 ND 545 70-130 Q-01 <br /> Toluene 170 050 200 ND ' 850 70-L30 <br /> Ethylbenzene 171 050 200 ND 85 5 70-130 <br /> Xylenes(total) 525 050 <br /> 600 ND 875 70-130 <br /> Surrogate a a a-Tnfluorotolueue 270 300 900 70-130 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chane <br /> custody document This analytical report must be reproduced in its enter <br /> Page 4 of 6 <br />