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' 819 Striker Ave Ste 8 <br /> `C4 t Sequoia Sacramento C45834 <br /> (916)9221 9600 <br /> TQF Analytical FAX 921 47 <br /> Wsequoialabslabs cocom <br /> Geological Technics,Inc Project Cardoza 5312120 <br /> 1 101 7th Street Project Number 662 2 Reported <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 01/23/04 17 37 <br /> GasohnelBTEXIOxygenates by EPA method 8260B-Quality Control <br /> ' Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Balch 3120094-EPA 5030B 1P/T1 <br /> Blank(3120094-BLK1) Prepared&Analyzed 12/08/03 <br /> Tett-butyl alcohol ND 50 ugll <br /> Methyl tert-butyl ether ND 0 50 <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 0 50 <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 ND 50,Mft " <br /> Surrogate Toluene-d$ 258 250 103 60-140 <br /> arrogate 4-BFB 250 250 100 60-140 <br /> Surrogate 12-DCA-d4 268 250 107 60-140 <br /> Blank(3120094-BLK2) Prepared&Analyzed 12/05/03 <br /> Tert-butyl alcohol ND 50 ugli <br /> Methyl tert butyl ether ND 0 50 <br /> Di-isopropyl ether ND 050 " <br /> ' Ethyl tert-butyl ether ND 050 <br /> Tert-amyl metbyl ether ND 050 <br /> 1 2-DibrOmoethane(EDB) ND 0 50 " <br /> Benzene ND 0 50 " <br /> Ethylbenzene ND 0 50 <br /> Toluene ND 050 <br /> Xylenes(total) ND 0 50 " <br /> Gasoline Range Organics ND 50 <br /> Surrogate Toluene-d8 263 250 105 60-140 <br /> Surrogate 4-BFB 248 15 0 99 60-140 <br /> Surrogate 1 2-DCA-d4 263 250 105 60-140 <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 height basis <br /> This analytical report must be reproduced in its entirety <br /> Page 18 of 25 <br />