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819 Striker Avenue Suite 8 <br /> ento CA 9834 <br /> Sequoia (916)92159600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs corn <br /> Gettler-Ryan-Dublin Project Tosco 0187, Stockton,CA <br /> 6747 Sierra Court, Ste J Project Number C-Sparge Test Reported <br /> Dublin CA,94568 Project Manager Paul LeCheminant 05/15/01 11 55 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %P-EC Limits RPD Limit Notes <br /> Batch 1050176- EPA 5030B PIT) <br /> Blank(1050176-BLKI) Prepared&Analyzed 05/10/01 <br /> Purgeable Hydrocarbons ND Soo ug/l <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tent-butyl ether ND 2 50 <br /> Surrogate a a a-Treuorotoluene 939 100 95 9 60-140 <br /> LCS(1050176-BS1) Prepared&Analyzed 05/10/01 <br /> Benzene 845 0 500 ug/l. too 845 70-130 <br /> luene 8 71 0 500 " too 871 70-130 <br /> ylbenzene 816 0 500 100 816 70-130 <br /> Xylenes(total) 314 0 500 300 105 70-130 <br /> Methyl tent-butyl ether 842 2 50 too 84 2 70-130 <br /> Surrogate a a a-Trti luorotoluene 9 12 100 912 60-140 <br /> Matrix Spike(1050176-MSI) Source S105117-03 Prepared&Analyzed 05/10/01 <br /> Benzene 9 18 0 500 ug/1 100 ND 91 8 60-140 <br /> Toluene 995 0 500 10 0 ND 99 5 60-140 <br /> Ethylbenzene 105 0 500 100 ND 105 60-140 <br /> Xylenes(total) 31 5 0 500 300 ND 105 60-140 <br /> Methyl tent-butyl ether 866 2 50 10 0 ND 866 60-140 <br /> Surrogate a a a-Triuorotoluene 101 100 101 60-140 <br /> Matrix Spike Dup(1050176-MSD1) Source 5105117-03 Prepared&Analyzed 05/10/01 <br /> Benzene 8 82 0 500 ug/l 100 ND 882 60-140 400 25 <br /> Toluene 979 0 500 too ND 97 9 60-140 162 25 <br /> Ethylbenzene 103 0 500 100 ND 103 60-140 192 25 <br /> Xylenes(total) 309 0 500 300 ND 103 60-140 192 25 <br /> Methyl tent-butyl ether 847 250 100 ND 84 7 60-140 222 25 <br /> Surrogate a a a-Trifluorotoluene 9 65 100 965 60-140 <br /> equoia Analytical -Sacramento The results in this report apply 10 the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 5 <br />