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Sequoia 819 Striker Ave Ste 8 <br /> Saeram 45834 <br /> (916 <br /> (916)92921-96pp <br /> FAX 6 �O 100 <br /> Analytical wwwsequwialabs corn <br /> Gettler-Ryan-Dublin Project Former Unocal 0187,Stockton,CA S302212 <br /> 6747 Sierra Court,Ste J Project Number N/A _ Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 02/28/03 19 02 <br /> Gasoline (2-Methylpentane to 1,2,4-Trlmethylbenzene) and BTEX by EPA 8015M and 8021B - Quality Contr <br /> Sequoia Analytical - Sacramento <br /> - - Reporting' - Spike Source %REC -RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3020224-EPA 5030B(PIT) <br /> Blank(3020224-BLKI)- - Prepared&Analyzed 02/18/03- <br /> Surrogate a a a-Tr fluorotoluene 910 ug/1 100 91 60-140 <br /> Blank(3020224-BLK2) Prepared 02/19/03 Analyzed 02/20/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl ten-butyl ether ND 2 0 " <br /> Surrogate a a a-Trifluorotoluene 871 100 87 60-140 <br /> Laboratory Control Sample(3020224-BSI) Prepared&Analyzed 02/18/03 <br /> Benzene 9 14 050 ug/l too 91 70-130 <br /> Toluene 930 050 100 93 70-130 <br /> Ethylbenzene 8 64 0 50 too 86 70-130 <br />_ Xylenes_(tota_l) 279 050 300 _ _ 93 70-130 <br /> Methyl tert-butyl ether 9 12 2 0 100 91 70-130 <br /> Surrogate a a a-Trifluorotoluene 977 100 98 60-140 <br /> Laboratory Control Sample(3020224-BS2) Prepared& Analyzed 02/19/03 <br /> Benzene 879 050 ug/1 100 88 70-130 <br /> Toluene 928 050 100 93 70-130 <br /> Ethylbenzene 906 050 Wo 91 70-130 <br /> Xylenes(total) 277 0 50 300 92 70-130 <br /> Methyl teri-butyl ether 984 2 0 loo 98 70-130 <br /> Surrogate a a o-Trifluorotoluene 887 100 89 60-140 <br /> Matrix Spike(3020224-MSI) Source S302221-31 Prepared 02/18/03 Analyzed 02/19/03 <br /> Benzene 961 0 50 ug/l too ND 96 60-140 <br /> Toluene 959 0 50 too ND 96 60-140 <br /> Ethylbenzene 937 0 50 t 0 0 ND 94 60-140 <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise staled results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 27 of 33 <br />