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M-�-Laboratories Inc.; <br />Environmental Testing Laboratory Since 1949 <br />Geologic Associates Reported: 10/20/2011 16:54 <br />11415 West Bernardo Ct, Ste 200 Project: Corral Hollow EMP <br />San Diego, CA 92127 Project Number: 2011-0115 <br />Project Manager: John Hower <br />Volatile Organic Analysis (EPA Method 8260) <br />BCL Sample ID: 1116926-03 Client Sample Name: QCTB, 10/13/2011 12:00:OOAM <br />MB Lab <br />Constituent Result Units PQL MDL Method Bias Quals Run # <br />Tetrachloroethene <br />NO <br />ug/L <br />0.50 0.13 <br />EPA -8260 <br />ND <br />1 <br />---- <br />Toluene <br />ND <br />ug/L <br />- <br />0.50 0.093 <br />EPA -8260 <br />ND <br />- <br />1 <br />1,2,3-Trichlorobenzene <br />ND <br />ug/L <br />0.50 0.16 <br />EPA -8260 <br />NO <br />1 <br />1 24 Trichlorobenzene <br />111 <br />ND <br />ND <br />ug/L <br />0.50 0.19 <br />0.50 0.11 <br />EPA -8260 <br />EPA <br />ND <br />ND <br />1 <br />-Trichloroethane <br />ug/L <br />-8260 <br />1 <br />1,1,2 -Trichloroethane <br />ND <br />ug/L <br />0.50 0.16 <br />EPA -8260 <br />ND <br />1 <br />Trichloroethene <br />ND <br />ug/L <br />0.50 0.085 <br />EPA -8260 <br />ND <br />1 <br />Trichlorofluoromethane <br />NO <br />ug/L <br />0.50 0.13 <br />EPA -8260 <br />NO <br />1 <br />1,2,3-Trichloropropane <br />ND <br />ug/L <br />1.0 0.24 <br />EPA -8260 <br />ND <br />1 <br />- <br />1,2,4-Trimethylbenzene <br />ND <br />ug/L <br />- <br />0.50 0.12 <br />EPA -8260 <br />-- - <br />ND <br />1 <br />1,3,5-Trimethylbenzene <br />ND <br />ug/L <br />0.50 0.12 <br />EPA -8260 <br />ND <br />1 <br />Vinyl chloride <br />ND <br />ug/L <br />0.50 0.12 <br />EPA -8260 <br />ND <br />1 <br />Total Xylenes <br />NO <br />ug/L <br />1.0 0.36 <br />EPA -8260 <br />NO <br />1 <br />Acetone <br />ND <br />ug/L <br />10 4.6 <br />EPA -8260 <br />ND <br />1 <br />Acetonitrile <br />ND <br />ug/L <br />10 5.5 <br />EPA -8260 <br />ND <br />1 <br />Acrylonitrile <br />ND <br />ug/L <br />5.0 1.2 <br />EPA -8260 <br />ND <br />1 <br />Carbon disulfide <br />NO <br />ug/L <br />1.0 0.38 <br />EPA -8260 <br />ND <br />1 <br />trans- l,4-Dichloro-2-butene <br />NO <br />- <br />ug/L <br />5.0 1.4 <br />EPA -8260 <br />- <br />NO <br />1 <br />2-Hexanone <br />NO <br />ug/L <br />10 3.4 <br />EPA -8260 <br />ND <br />- <br />1 <br />Methyl ethyl ketone <br />ND <br />ug/L <br />10 2.5 <br />EPA 8260 <br />ND <br />1 <br />Methyl iodide <br />ND <br />ug/L <br />2.0 0.47 <br />EPA -8260 <br />ND <br />1 <br />Methyl isobutyl ketone <br />ND <br />ug/L <br />10 2.1 <br />EPA -8260 <br />ND <br />1 <br />Vinyl acetate <br />NO <br />ug/L <br />10 1.8 <br />EPA -8260 <br />NO <br />1 <br />p- & m -Xylenes <br />NO <br />ug/L <br />0.50 0.28 <br />EPA -8260 <br />ND <br />1 <br />o -Xylene <br />1,2-Dichloroethane-d4 (Surrogate) <br />ND <br />94.7 <br />ug/L <br />% <br />0.50 0.082 <br />76-114 (LCL - UCL) <br />EPA -8260 <br />EPA -8260 <br />ND <br />1 <br />1 <br />Toluene -d8 (Surrogate) <br />95.6 <br />% <br />88-110 (LCL - UCL) <br />EPA -8260 <br />1 <br />4-Bromofluorobenzene (Surrogate) <br />91.5 <br />% <br />86-115 (LCL - UCL) <br />EPA -8260 <br />1 <br />Run <br />QC <br />Run # Method <br />Prep Date <br />Date/Time <br />Analyst Instrument Dilution <br />Batch ID <br />1 EPA -8260 <br />10/19/11 <br />10/19/11 16:16 MGC MS -V5 1 <br />BUJ1213 <br />j <br />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 results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. <br />4100 Atlas Court Bakersfield, <br />CA 93308 <br />(661) 327-4911 FAX <br />(661) 327-1918 www.bclabs.com <br />Page 9 of 14 <br />