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1 819 Striker Ave Ste 8 <br /> Sequoia i Sacramento 92 99600 <br /> A) al�t)[Ci � (916)9219600 <br /> � <br /> FAX(915)921 0100 � <br /> www sequosatabs oom <br /> io <br /> ' Geological Technics,Inc Project Marct Property 5412285 <br /> 1101 7th Street Project Number[none] Reported <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 12/28/04 17 54 <br /> GasolinelBTEMOxygenates by EPA method 8260B -Quality Control <br /> ' Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Luint Units Level Result %REC Limits RPD Limit Notes <br /> ' Batch 4120312-EPA 5030B [P/TI EPA 8260B <br /> Blank(4120312-BLK1) Prepared 12/22/04 Analyzed 12/23/04 <br /> Ethanol ND 50 ug/1 <br /> ' Tert-butyl alcohol ND so <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 /> 1,2-Dichloroethane ND 050 <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 /> 116111k-yasolme Range Organics(C4-M) ND 50W"WSurrogate I 1-DCA-d4 896 100 90 60-140 <br /> Surrogate Toluene-d8 107 " 100 107 60-140 <br /> Surrogate 4-BFB 997 100 100 60-140 <br /> Blank(4120312-BLK2) Prepared&Analyzed 12/23/04 <br /> Ethanol ND 50 ug/l <br /> Tert-bury]alcohol ND 50 <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 '1 <br /> 1,2-Dichloroethane ND 050 <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Benzene ND 050 " <br />' Ethylbenzene ND 0 50 <br /> Toluene ND 050 <br /> Xylenes(total) - ND 050 - <br />' Gasoline Range Organics(C4-C12) ND 50 n <br /> Surrogate 1,1-DCA-d4 929 100 93 60-140 <br /> Surrogate Toluene-d8 110 100 110 60-140 <br />' Surrogate 4-BFB 987 100 99 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 weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 13 of 16 <br />