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AW'm <br />ToXiCS LTD. <br />Laboratory 9,. <br />J <br />LABORATORY NARRATIVE <br />EPA Method TO -15 <br />SCS Field Services <br />Workorder# 1101403 <br />Ten 1 Liter Summa Canister samples were received on January 26, 2011. The laboratory performed <br />analysis via modified EPA Method TO -15 using GUMS in the full scan mode. <br />This workorder was independently validated prior to submittal using 'USEPA National Functional <br />Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules -based, logic <br />driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant <br />project quality control requirements and verification of all quantified amounts. <br />Receiving Notes <br />There were no receiving discrepancies. <br />Analytical Notes <br />A dilution was performed on sample SGl due to the presence of high level target species. <br />Definition of Data Qualifying Flags <br />Eight qualifiers may have been used on the data analysis sheets and indicates as follows: <br />0 <br />B - Compound present in laboratory blank greater than reporting limit (background subtraction not <br />performed). <br />J - Estimated value. <br />E - Exceeds instrument calibration range. <br />S - Saturated peak. <br />Q - Exceeds quality control limits. <br />U - Compound analyzed for but not detected above the reporting limit. <br />UJ- Non-detected compound associated with low bias in the CCV <br />N - The identification is based on presumptive evidence. <br />File extensions may have been used on the data analysis sheets and indicates <br />as follows: <br />a -File was requantified <br />b -File was quantified by a second column and detector <br />rl-File was requantified for the purpose of reissue <br />Page 4 of 43 <br />