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te 8 <br /> Sequoia 81 er Ave 5 <br /> Sacramentan=1o,CA 95834834 <br /> (9167 921- <br /> Analytical <br /> PAX(916)927-0100100 <br /> 0 <br /> www sequaialabs com <br /> Geological Technics,Inc Project Cardoza S412352 <br /> 1101 7th Street Project Number 662 2 Reported <br /> ' Modesto CA,95354 Protect Manager Joseph Angulo 01/03/05 l7 30 <br /> GasohnelBTEMOxygenates by EPA method 8260B-Quality Control <br /> ' <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lrnut Units Level Result "/REC Limits RPD Limit Notes <br /> Batch 4120282-PPA 5030E[PIT] 1 EPA 8260E <br /> Blank(4120282-BLK3) Prepared&Analyzed 12/26/04 <br /> Ethanol ND 50 ug/l <br /> ' Tert-butyl alcohol ND 50 " <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tertbutyl ether ND 050 " <br /> ' Tert-amyl methyl ether ND 050 " <br /> 1,2-Dicbloroethane - ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Benzcne ND 050 " <br /> Ethylbenzene ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> �Aso11 Range Organics(C4-C12) ND 50 N <br /> Surrogate 1,2-DCA-d4 920 100 91 60-140 <br /> Surrogate Toluene-418 105 100 105 60-140 <br /> ' Surrogate 4-BFB 101 100 102 60-140 <br /> Laboratory Control.Sample(4120282-BSI) Prepared&Analyzed I2/21/04 <br /> Methyl tert-butyl ether 181 050 ug/1 200 90 60-140 <br /> ' Benzene 185 050 11 200 92 70-130 <br /> Toluene 186 050 200 93 70-130 <br /> Surrogate 12-DCA-d4 999 100 100 60-140 <br /> ' Surrogate Toluene d8 897 Mo 90 60-140 <br /> Surrogate 4-RF8 969 100 97 60-140 <br /> Laboratory Control Sample(4120282-BS2) Prepared&Analyzed 12/21/04 <br /> Methyl tert butyl ether 426 050 ug/l 432 99 60-140 <br /> ' Benzene 258 050 268 96 70-130 <br /> Toluene 167 050 152 110 70-130 <br /> Gasoline Range Organics(C4-C12) 2310 50 2200 105 70-130 <br /> ' Surrogate 12-DCA-d4 937 n10 0 94 60440 <br /> Surrogate Toluene-d8 960 100 96 60-140 <br /> Surrogate 4-BFB 105 100 105 60-140 <br /> ' <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 10 of 13 <br />