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L <br /> BC <br /> Laboratories, Inc <br /> TRC Alton Geoscience Project 6981 <br /> 21 Technology Dnve 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 IAB Result Units PQL MDL Lab Quals <br /> Ethanol BOG0077 BOG0077-BLK1 ND ug/L 1000 110 <br /> Ethyl t butyl ether BOG0077 BOG0077-BLK1 ND ug1L 050 027 <br /> Total Purgeable Petroleum Hydrocarbons BOG0077 BOG0077-BLK1 ND ug/L 50 23 <br /> 1,2-Dichloroethane-d4(Surrogate) BOG0077 BOG0077-BLK1 932 % 76-114 (LCL-UCL) <br /> Toluene-dB(Surrogate) BOG0077 BOG0077-BLK1 980 % 88-110 (LCL-UCL) <br /> 4-Bromofluorobenzene(Surrogate) BOG0077 BOG0077-BLK1 902 % 86-115 (LCL-UCL) <br /> BC Laboratories The results to this report apply to the samples analyzed in accordance tvtth the chain ofcustody document This analytical report must be reproduced to its entirely <br /> All results listed in this report are For the exdustve use of the suhmtrtu116 Party RC Lahnratones Inc assumes no responsihihr)For report alreranon sepiraoon detachment or rhtrd parry rnterpretaoon <br /> 4100 Arms Court- Bakersfield, CA 93308 - (661) 327-4911 - FAX(661) 327-1918 0 www bclabs coni Page 44 of 46 <br />