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I{ <br /> BC Laboratories, Inc _ 1 <br /> TRC Alton Geoscience Project 11192 <br /> 21 Technology Drive Project Number [none] <br /> Irvine CA,92618-2302 Project Manager Anju Farfan Reported 09/12/05 14 16 <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 B010044 8010044-BLK1 ND ug/L 050 012 <br /> 1,2-Dibromoethane B010044 B010044-BLK1 ND ug/L 0 50 0 11 <br /> 1,2-Dichloroethane 8010044 8010044-BLK1 ND ug/L 0 50 025 <br /> Ethylbenzene B010044 8010044-BLK1 ND ug/L 0 50 013 <br /> Methyl t-butyl ether B010044 8010044-BLK1 ND ug/L 050 015 <br /> Toluene B010044 B010044-BLK1 ND ug/L 0 50 0 15 <br /> Total Xylenes 8010044 B010044-BLK1 ND ug/L 1 0 040 <br /> t-Amyl Methyl ether B010044 8010044-BLK1 ND ug1L 0 50 0 31 <br /> t-Butyl alcohol 8010044 8010044-BLK1 ND ug1L 10 10 <br /> Dusopropyl ether B010044 8010044-BLK1 ND uglL 0 50 025 <br /> Ethanol B010044 B010044-BLKI ND ug1L 1000 110 <br /> Ethyl t-butyl ether B010044 8010044-BLK1 ND ug1L 050 027 <br /> Total Purgeable Petroleum Hydrocarbons B010044 8010044-BLK1 ND uglL 50 23 <br /> 1,2-Dichlofoethane-d4(Surrogate) B010044 B010044-BLK1 96 6 % 76-114 (LCL UCL) <br /> Toluene-d8(Surrogate) B010044 B010044-BLK1 95 8 % 88-110 (LCL-UCL) <br /> 4-Bromofluorobenzene(Surrogate) B010044 B010044-BLK1 883 % 86-115 (LCL-UCL) <br /> 1,2-Dibromoethane 8010046 B010046-BLK1 ND uglL 050 Oil <br /> 1,2-Dichloroethane B010046 8010046-BLK1 ND ug1L 0 50 025 <br /> Methyl t-butyl ether 8010046 8010046-BLK1 ND ug1L 0 50 0 15 <br /> t-Amyl Methyl ether B010046 B010046-BLK1 ND ug/L 0 50 0 31 <br /> t-Butyl alcohol 8010046 8010046-BLK1 ND uglL 10 10 <br /> Dtisopropyl ether B010046 8010046-BLK1 ND ug/L 050 025 <br /> Ethanol 6010046 8010046-BLK1 ND ug/L 1000 110 <br /> Ethyl t-butyl ether B010046 8010046-BLK1 ND uglL 050 027 <br /> 1,2-Dtchloroethane-d4(Surrogate) 8010046 B010046-BLK1 104 % 76-114 (LCL-UCL) <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance with the chain of custody document This analytical report must be reproduced in its entirety <br /> All rrsults listed to this report are For the exclusive use of the submitting parry BC Laboratories Inc assumes no responsibility For report alteration separation detachment or third party interpretation <br /> 4100 Atlas Court- Bakersfield,CA 93308- (661) 327-4911 - PAX(661)327-1918-www bclabs com Page 20 of 22 <br /> I <br />