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s19 sinker Ave Ste 8 <br /> Sequoia Sacramento,CA s5834 <br /> (916)921.9600 <br /> Analytical FAX(916)921-0100 <br /> www scquotalabs onm <br /> 1 <br /> Geological Technics,Inc Project Morltas Bros S508570 <br /> ' 1I01 7th Street ' ProjectNumber724 2 Reported <br /> Modesto CA,95354 Project Manager Geological Technics,Inc 09/09/05 16 21 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> ' Sequoia Analytical-Sacramento <br /> Reporting Spike Source %R.EC RPD <br /> Analyte Result Linut Units Level Result "1oREC Limits RPD Limit Notes <br /> ' Batch 5090095-EPA 5030E [P/TJ/EPA 8260B <br /> Blank(5090095-BLKI) Prepared&Analyzed 09/08/05 <br /> Tert-butyl alcohol ND 50 ug/1 <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> ]Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> ]Ethanol ND 50 <br /> 1,2-Dtchtorcethane ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Surrogate 12-DCA-d4 118 11 <br /> 100 118 60-140 <br /> Laboratory Control Sample(5090095-BSI) Prepared&Analyzed 09/08/05 <br /> Methyl tert-butyl ether 225 050 ugll 200 112 60-140 <br /> W111119-te 12-DC4-d4 119 11100 119 60-140 <br /> Laboratory Control Sample Dup(5090095-ESDI) Prepared 09/08/05 Analyzed 09/09/05 <br /> ' Methyl tert-butyl ether 276 050 ug/l 200 139 60-140 20 25 <br /> Surrogate 12-DCA-d4 107 100 107 60-140 <br /> t <br /> Sequoia Anal}mcal-Sacramento The results in this report apply to the samples analyzed in accordance with the churn of <br /> custody document Unless othern+ese stated,results are reported on a wet weight bases <br /> This analytical report must be reproduced in its enterery <br /> Page 15 of 16 <br />