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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 Pioject Managei Anju Farfan Reported 07/08/05 10 51 <br /> Volatile Organic Analysis (EPA Method 8260) <br /> BCL Sample ID 0506373-10 Client Sample Name 6981, MW-11, MWA 1, 6/28/2005 8 25 OOAM, Basi/Mellssa <br /> Prep Run Instru- QC MB Lab <br /> Constituent Result Units PQL MDL Method Date Date/Time Analyst ment ID Dilution Batch ID Bias Quals <br /> 'B enzene ND ug1L 050 012 EPA-8260 07/01/05 07/05/05 17 27 svm MS-V4 1 90G0008 ND <br /> 1 2-Dibromoethane ND uglL 050 Oil EPA-8260 07/01/05 07/05/05 1727 svm MS-V4 1 BOG0008 ND <br /> 1,2-Dichloroethane ND uglL 050 025 EPA-8260 07/01/05 07/05/05 1727 svm MS-V4 1 BOG0008 ND <br /> Ethylbenzene ND ug1L 050 013 EPA-8260 07/01/05 07/05/05 1727 svm MS-V4 1 130130008 ND <br /> Methyl t-butyl ether ND ug1L 050 015 EPA-8260 07/01/05 07/05/05 1727 svm MS-V4 1 BOG0008 ND <br /> Toluene ND uglL 050 015 EPA-8260 07/01/05 07/05/05 1727 svm MS-V4 1 B000008 ND <br /> Total Xylenes ND ug/l_ 10 040 EPA-8260 07/01/05 07/05/05 1727 svm MS-V4 1 130130008 ND <br /> t-Amyl Methyl ether ND ug1L 050 031 EPA-8260 07/01/05 07/05/05 1727 svm MS-V4 1 BOG0008 ND <br /> t-Butyl alcohol ND ug1L 10 10 EPA-8260 07/01/05 07/05/05 1727 svm MS-V4 1 80130008 ND <br /> Dnsopropyl ether ND uglL 050 025 EPA-8260 07/01/05 07/05/05 1727 svm MS-V4 1 BOG0008 ND <br /> Ethanol ND ug1L 1000 110 EPA-8260 07/01/05 07/05/05 1727 svm MS-V4 1 BOG0008 ND <br /> Ethyl t-butyl ether ND uglL 050 027 EPA-8260 07/01/05 07/05/05 1727 svm MS-V4 1 BOG0008 ND <br /> 1,2-Dichloroethane-d4(Surrogate) 100 % 76-114 (LCL-UCL) EPA-8260 07/01/05 07/05/05 1727 svm MS-V4 1 BOG0008 <br /> Toluene-d8(Surrogate) 91 7 % 88-110 (LCL-UCL) EPA-826D 07/01/05 07/05/05 1727 svm MS-V4 1 80130008 <br /> 4-Bromofluorobenzene(Surrogate) 916 % 86-115 (LCL-UCL) EPA-8260 07/01/05 07/05/05 1727 svm MS V4 1 80130008 <br /> I <br /> BC Labor atortes The results in this report apply to the samples analvzed in accordance with the chain of custody docionent This analytical report must be repro ed Pa <br /> to tis entiret}� <br /> • All results listed m this report ire for the exclusive use of the submitting parry BC Laboratnrtes 1 ares no responsibrhr) for report alteration separannn denchnrent or third parry interpretation <br /> 4100 Atlas Court• Bakersfield,CA 93308 • (661) 491 1 • FAX(661) 327-1918 •www blabs coin ge 23 of 46 <br />