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1 819 Striker Ave Ste 8 <br /> Sequoia Sacrnaocato CA 95834 <br /> ' (91 )92L 9100 <br /> Analytical FAX(9166)921-0100 <br /> www sequotalttbs coni <br /> I• <br /> ' Geological Technics,Inc Project Marcr Property S412285 <br /> 1101 7th Street Project Number[none] Repotted <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 12/28/04 17 54 <br /> GasolinelBTEMOxygenates by EPA method 8260B-Quality Control <br /> ' <br /> Sequoia Analytical-Sacramento <br /> Reporting Spoke Source %REC RPD <br /> Analyte Result Lutist Units LeveL Result %RHC Luavts RPD Lonut Notes <br /> ' Batch 4120282-EPA 5030B [P/T1/EPA 8260B <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 /> D1-isopropyl ether ND 050 " <br /> Ethyl cert-butyl ether ND 050 " <br /> ' Tert-aroyl methyl ether ND 050 11 <br /> 1,2-Dichloroethane ND 050 <br /> 1,2-Dibromoethane(EDB) ND 050 " <br />' Benzene ND 050 <br /> Ethylbenzene ND 050 <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-Cl2) ND 50 " <br /> Surrogate 1,2-DCA-d4 920 100 92 60-140 <br /> Surrogate Toluene-d8 105 100 105 60-140 <br /> 1 Surrogate 4-BFB 102 100 102 60-140 <br /> Laboratory Control Sample(4120282-BSI) Prepared&Analyzed 12/21/04 <br /> Methyl tert-butyl ether 181 050 ug/1 200 90 60-140 <br />' Benzene 185 050 200 92 70-130 <br /> Toluene 186 050 200 93 70-130 <br /> Surrogate 12-DC.4-d4 999 100 100 60-140 <br />' Surrogate Toluene-dg 897 700 90 60-140 <br /> Surrogate 4-BFB 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 I t 0 70-130 <br /> Gasoline Range Organics(C4-C)2) 2310 _50 _ 2200 _ 105_ 70-130_ <br />' Surrogate 1,2-DCA d4 937 " 100 94 60140 <br /> Surrogate Toluene-d8 960 " 100 96 60-140 <br /> Surrogate 4-BFB 105 zoo 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 bases <br /> This analytical report must be reproduced in as entirety <br /> Page 11 of 16 <br /> 1 <br />