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Sequoia 619SAveSte 8 <br /> Sacramentoento CA 95634 <br /> (916)921 9600 <br /> I.Q Analytical FAX(916)92I-0100 <br /> www segiioialabs com <br /> Geological Technics Inc Project Marct Property 5408474 <br /> 1101 7th Street Project Number 3RD QTR 2004 Reported <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 09/03/04 17 30 <br /> Gasoline\BTEXIOzygenates by EPA method 8260B-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Repoituig Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits APD Limit Notes <br /> ' Batch 4080389-EPA 5030B]PIT] <br /> Blank 4080389-BLK3 Prepared 08/30/04 Analyzed 08/31/04 <br /> Ethanol ND 50 118/1 <br /> ' Tert-butyl alcohol ND 5 0 " <br /> Methyl tort-butyl ether ND 0 50 <br /> Di-isopropyl ether ND 0 50 " <br /> ' Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 0 50 <br /> 1,2-Dichloroethane ND 0 50 <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> ' Benzene ND 050 <br /> Ethylbenzene ND 050 <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 <br /> Range Organics(C4-C12) ND 50 " <br /> Surrogate Toluene-d8 - 112 100 112 60-140 <br /> Surrogate 4-BFB 110 100 110 60-140 <br /> Surrogate 1,2-DCA-d4 840 100 84 60-140 <br /> Laboratory Control Sample(4080389-BS1) Prepared 08/25/04 Analyzed 08/26/04 <br /> Methyl tert-but l ether __ -- - <br /> y yl ether $36 050 ug/I 864 97 60-140 <br />' Benzene 5 16 050 11 536 96 70-130 <br /> Toluene 35 6 050 30 3 117 70-130 <br /> Gasoline Range Organics(C4-C12) 482 50 440 110 70-130 <br /> Surrogate Toluene-d8 113 100 113 60-140 <br /> Surrogate 4-BFB 831 100 83 60-140 <br /> Surrogate 1 2-DCA-d4 112 100 112 60-140 <br />' Laboratory Control Sample(4080389-BS2)- Prepared&Analyzed 08/27/04 _ <br /> Methyl tert-butyl ether 848 050 119/1 864 98 60-140 <br /> Benzene 5 11 0 50 536 95 70-130 <br /> Toluene - - - 310 - ' 0 50 30 3 - 102- -70-130— - - - - <br />' Gasoline Range Organics(C4-C12) 372 50 440 85 70-130 <br /> Surrogate Toluene-d8 999 100 100 60-140 <br /> Surrogate 4-BFB 890 100 89 60-140 <br />' Surrogate 1,2-DCA-d4 106 100 106 60-140 <br />' Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated,results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 11 of 16 <br /> 1 <br />