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urofins <br /> Air Toxics <br /> LABORATORY NARRATIVE <br /> EPA Method TO-15 <br /> SCS Field Services <br /> Workorder# 1301544 <br /> Four 1 Liter Summa Canister samples were received on January 30, 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 /> Dilution was performed on sample TP WEST HEADER(H, 1-6) due to the presence of high level target <br /> species. <br /> Dilution was performed on sample TP EAST HEADER due to the presence of high level non-target <br /> species. <br /> All Quality Control Limit exceedances and affected sample results are noted by flags.Each flag is defined <br /> Q tY p <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 /> 1,4-Dichlorobenzene was detected in the laboratory blank analyzed on 02/06/2013 at less than 5X the <br /> reporting limit. Associated samples that contained 1,4-Dichlorobenzene were flagged as indicated. <br /> Definition of Data Qualifying 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 <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 22 <br />