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I <br /> BC' Laboratories, Inc <br /> TRC Alton Geoscience Project 6981 <br /> 21 Technology Drive Project Number [none] <br /> Irvine CA,92618-2302 Project Managei Anju Farfan Reported 07/08/05 10 51 <br /> Volatile Organic Analysis (EPA Method 8260) <br /> BCL Sample ID 0506373-14 Client Sample Name 6981, MW-4, MW-4, 6/28/2005 10 41 OOAM, Basi/Melissa <br /> Prep Run Instru- QC MB Lab <br /> Constituent Result Units PQL MDL Method Date DatelTime Analyst ment ID Dilution Batch ID Bias Quals <br /> Benzene NO uglL 050 0 12 EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 NO <br /> 1 2-Dibromoethane NO uglL 050 Oil EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 ND <br /> 1,2-Dichloroethane NO uglL 0 50 025 EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 NO <br /> Ethylbenzene NO uglL 050 0 13 EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 ND <br /> Methyl t butyl ether NO uglL 0 50 0 15 EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 ND <br /> Toluene NO ug1L 0 50 015 EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BO00077 NO <br /> Total Xylenes ND uglL 1 0 040 EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 NO <br /> t-Amyl Methyl ether ND uglL 050 0 31 EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 NO <br /> t-Butyl alcohol NO ug1L 10 10 EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 NO <br /> Dusopropyl ether NO ug1L 050 025 EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 NO <br /> Ethanol NO ug/L 1000 110 EPA 8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 NO <br /> Ethyl t-butyl ether NO ug1L 050 027 EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 NO <br /> 1,2-Dichloroethane-d4(Surrogate) 102 % 76-114 (LCL-UCL) EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 <br /> Toluene-d8(Surrogate) 933 % 88-110 (LCL-UCL) EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 <br /> 4-Bromofluorobenzens(Surrogate) 91 0 % 86-115 (LCL-UCL) EPA-8260 07/05/05 07/07/05 0209 svm MS-V4 1 BOG0077 <br /> I <br /> I <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 reprod ed to its entirety- <br /> All <br /> ntiretyAll resuhs Issred to this report Ire for the exclusive use of rhe submitting perry BC lalwatones [ trees no responsrbiliry Fix report alteration septranon cietaclunent or third pury mterprewunn <br /> 4100 Atlas Court• Bakersfield,CA 93308• (661) -4911 • FAX(661) 327-1918 •www hclabs.com Page 31 of 46 <br />