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urfin <br /> Air Tonics <br /> LABORATORY NARRATIVE <br /> EPA Method TO-15 <br /> Tetra Tech - GEO <br /> Workorder# 1302067A <br /> Three 1 Liter Summa Canister samples were received on February 04, 2013. The laboratory performed <br /> analysis via 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 /> All Quality Control Limit exceedances and affected sample results are noted by flags. Each flag is defined <br /> at the bottom of this Case Narrative and on each Sample Result Summary page. Target compound <br /> non-detects in the samples that are associated with high bias in QC analyses have not been flagged. <br /> Definition of Data Oualifying Flags <br /> Eight qualifiers may have been used on the data analysis sheets and indicates as follows: <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 and/or LCS. <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 3 of 18 <br />