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819 Striker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> (916}921 9600 <br /> Analytical wFAX lww (916) <br /> sequotalab100 ip we <br /> om <br /> Geological Technics,Inc Project Cardoza S312120 <br /> 1101 7th Street Project Number 662 2 Reported <br /> Modesto CA,95354 Project Manager Joseph Angulo 01/23/04 17 37 <br /> Gas ohne1BTEX1Oxygenates 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 /> ' Batch 3120170-EPA 5030B [MeOH] <br /> Blank(3120170-BLKI) Prepared&Analyzed 12/14/03 <br /> Tert-butyl alcohol ND 0 050 mglkg <br /> ' Methyl tert-butyl ether ND 00050 <br /> Di-isopropyl ether ND 00050 <br /> Ethyl tert-butyl ether ND 00050 " <br /> ' Tert-amyl methyl ether ND 00050 <br /> 1,2-Dibromoethane(EDB) ND 00050 <br /> Benzene ND 00050 <br /> Ethylbenzene ND 00050 " <br /> ' Toluene ND 00050 ; <br /> Xylenes(total) ND 0 010 <br /> Gasoline Range Organics ND 1 0 " <br /> � <br /> urrogote 1 2-DCA-d4 0049.5 00500 99 60-140 <br /> i <br /> arrogate Toluene-d8 00524 00500 105 60-140 <br /> Surrogate 4-BFB 00520 00500 104 60-140 <br /> Blank(3120170-BLK2) Prepared&Analyzed 12/15/03 <br /> Tert-butyl alcohol ND 0 050 mg/kg <br /> Methyl tert-butyl ether ND 00050 <br /> Di-isopropyl ether ND 00050 " <br /> ' Ethyl Cert butyl ether ND 00050 " <br /> Tert-amyl methyl ether ND 00050 <br /> 1,2-Dibromoethane(EDS) ND 00050 " <br /> Benzene ND 00050 <br /> Ethylbenzene ND 00050 <br /> Toluene ND 00050 <br /> Xylenes(total) ND 0 010 <br /> ' Gasoline Range Organics ND l 0 <br /> Surrogate 12-DCA-d4 00520 V050 104 60-140 <br /> Surrogate Toluene-d8 00536 0 0500 107 60-140 <br /> Surrogate 4-BFB 00503 0 0500 101 60-140 <br /> ' Sequoia Analytical -Sacramento The results in this report apply to the samples ana13zed 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 20 of 25 <br />