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BC Laboratories, Inc <br /> TRC Alton Geoscience Project: 1 l 195 <br /> 21 Technology Drive Project Number: [none] <br /> Irvine CA,92618-2302 Protect Manager: Anju Farfan Reported: 10/13/05 15:57 <br /> Volatile Organic Analysis (EPA Method 8260) <br /> BCL Sample ID: 0508692-08 Client Sample Name: 11195, MW-24, MW-24, 8/31/2005 8:00:00AM, Melissa/Rick/Basi <br /> Prep Run Instru- QC MB Lab <br /> Constituent Result Units PQL MDL Method Date DateTime Analyst ment ID Dilution Batch ID Bias Quals — <br /> Benzene NO ug1L 0.50 EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 B010066 NO <br /> 1,2-Dibromoethane NO ug1L 0.50 EPA-8260 09102/05 09/03/05 06:57 svm MS-V4 1 8010066 ND <br /> 1,2-Dichloroethane NO ug/L 0.50 EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 B010066 ND <br /> Ethylbenzene NO ug/L 0.50 EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 8010066 NO <br /> Methyl t-butyl ether 0.91 ug/L 0.50 EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 B010066 ND — <br /> Toluene NO ug/L 0.50 EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 B010066 NO <br /> Total Xylenes NO ug/L 1.0 EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 6010066 NO - <br /> t-Amyl Methyl ether ND ug1L 0.50 EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 B010066 ND - <br /> t-Butyl alcohol NO ug1L 10 EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 B010066 ND <br /> Diisopropyl ether NO ug1L 0.50 EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 B010066 NO <br /> Ethanol NO ug/L 1000 EPA-8260 09102/05 09/03/05 06:57 svm MS-V4 1 8010066 ND <br /> Ethyl t-butyl ether ND ug/L 0.50 EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 8010066 ND <br /> Total Purgeable Petroleum NO ug/L 50 EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 8010066 NO <br /> Hydrocarbons _ - <br /> 1,2-Dichloroethane-d4(Surrogate) 98.1 % 76-114 (LCL-UCL) EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 8010066 — - <br /> Toluene-d8(Surrogate) 98.5 % 88-110 (LCL-UCL) EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 B010066 — <br /> 4-Bromofluorobenzene(Surrogate) 88.5 % 86- 115 (LCL-UCL) EPA-8260 09/02/05 09/03/05 06:57 svm MS-V4 1 B010066 <br /> BC Laborz '�s The results in this report apply to the sample: 11zed in accordance with the chain of custody document. This analytical report must be ry -luced m its entirety <br /> All results listed in this report are for the exclusive use of the submitting parry. BC Laboratories,lrn.assumes no respunsibilin'For report alteration,separation.detachment or third party interpretationPage <br /> nO Arlac C'nrtrr- Rnkrrsfield,CA 91308 - (661) 327-4911 -FAX(661) 327-1918 e www.bclabs.com Page 13 of 31 <br />