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BC Laboratories, Inc <br /> TRC Alton Geosctence Project 6981 <br /> 21 Technology Drive Project Number [none] <br /> Irvine CA,92618-2302 Project Manager Anju Farfan Reported 07/08/05 10 51 <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - Method Blank Analysis <br /> Constituent Batch ID QC Sample ID MB Result Units PQL MDL Lab Quals <br /> Benzene BOG0008 B000008-BLK1 ND ug/L 0 50 012 <br /> 1,2-Dibromoethane BOG0008 BOG0008-BLK1 ND ug/L 050 0 11 <br /> 1,2 Drchloroethane BOG0008 BOG0008-BLK1 ND ug/L 0 50 025 <br /> i <br /> Ethylbenzene BOG0008 BOG0008-BLK1 ND ug/L 050 013 <br /> Methyl t-butyl ether BOG0008 BOG0008-131-1<1 ND ug/L 0 50 015 <br /> Toluene BOG0008 BOG0008-BLK1 ND ug/L 0 50 015 <br /> Total Xylenes BOG0008 BOG0008-BLK1 ND ug/L 1 0 040 <br /> t-Amyl Methyl ether BOG0008 BOG0008-BLKi ND ug/L 0 50 0 31 <br /> t-Butyl afcohol BOG0008 BOG0008-BLK1 ND ug/L 10 10 <br /> Dusopropyl ether BOG0008 BOG0008-BLK1 ND ug/L 050 025 <br /> Ethanol BOG0008 BOG0008-BLK1 ND ug/L 1000 110 <br /> Ethyl t-butyl ether BOG0008 BOG0008-BLK1 ND ug/L 050 0 27 <br /> 1,2-Drchloroethane-d4(Surrogate) B000008 BOG0008-BLKi 102 % 76- 114 (LCL-UCL) <br /> Toluene-d8(Surrogate) BOG0008 BOG0008 BLKi 97 9 % 88-110 (LCL-UCL) <br /> 4-Bromottuorobenzene(Surrogate) BOG0008 BOG0008-BLKi 924 % 86-115 (LCL-UCL) <br /> Benzene BOG0077 BOG0077-BLK1 ND ug/L 050 012 <br /> 1 2 Dibromoethane BOG0077 BOG0077-BLK1 ND ug1L 050 011 <br /> 1,2-Drchloroethane BOG0077 BOG0077-BLKi ND ug/L 050 025 <br /> Ethylbenzene BOG0077 BOG0077-BLKi ND ug/1- 0 50 0 13 <br /> Methyl t-butyl ether BOG0077 BOG0077-BLKi ND ug/L 0 50 015 <br /> Toluene BOG0077 BOG0077-BLK1 ND ug/L 050 015 <br /> Total Xylenes BOG0077 BOG0077-BLK1 ND ug/L 1 0 040 <br /> t-Amyl Methyl ether 130GO077 BOG0077-BLKi ND ug/L 050 0 31 <br /> t-Butyl alcohol BOG0077 BOG0077-BLKi ND ug/L 10 10 <br /> Dusopropyl ether BOG0077 BOG0077-BLKi ND ug/L 050 025 <br /> i <br /> i <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance ivrth the charn of custody document Thrs analytical report must be reproduced to its entirety„ <br /> All results listed in this rLpurt are for the cxrlusrve use of rhe suhm lung yarn BC [ahorarones t nes no respo3rstbduy for report alterauon sep tnuon detachmrnnt or third parry utrerprer tWm40 c <br /> 4100 Atlas Court• Bakersfield,CA 93308 • (661) 4911 •FAX(661) 327-1918•www bcl rbs con, Page43 of46 <br />