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919 Sutker Avc Ste 8 <br /> I:D— Sequoia Sacramento CA 95834 <br /> (916)921 9640 <br /> Analytical FAX(916)9210140 <br /> www sequotalabs coin <br /> ' Geological Technics,Inc Project Cardoza S312195 <br /> 1 101 7th Street ProjectNtirnber 662 2 Reported <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 12/24/03 17 08 <br /> Gasoline\BTEXIOxygenates by EPA method 8260B - Quality Control <br /> ' Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Resull %REC Limits RPD LimnNotes <br /> ' Batch 3120283-EPA 5030E IP/Tl <br /> Blank(3120283-BLKI) Prepared&Analyzed 12/19/03 <br /> Teri-butyl alcohol ND 0 050 mg(kg <br /> ' Methyl tert-butyl ether ND 0 0050 <br /> Di-isopropyl ether ND 00050 <br /> Ethyl lert-butyl ether ND 00050 " <br /> ' Tert-amyl methyl ether ND 00050 " <br /> 1,2 Dibromoethanc(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 /> MSurrogate 1 2-DCA-d4 00606 ,I 00500 121 60-140 <br /> Surrogate Toluene-d8 00456 00500 91 60-140 <br /> Surrogate 4-BFB 00509 00500 102 60-140 <br /> ' Blank(3120283-BLK2) Prepared&Analyzed 12/22/03 <br /> Tert-butyl alcohol ND 0 050 mg/kg <br /> Methyl tert-butyl ether ND 00050 <br /> Di-isopropyl ether ND 00050 " <br /> ' Ethyl 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 /> I <br /> Surrogate 12-DCA-d4 00573 00500 115 60-140 <br /> Surrogate Toluene d8 00500 00500 100 60-140 <br /> ' Surrogate 4 BFB 00505 00500 101 60 140 <br /> i <br /> ' Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless other wise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 28 of 31 <br />