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U . <br /> zAir <br /> Toxics L-ra <br /> L borafory Services Since 1989 <br /> LABORATORY NARRATIVE <br /> EPA Method TO-17 <br /> Advanced GeoEnviron mental <br /> Workorder# 1104349R1 <br /> Three TO-17 VI Tube samples were received on April 18; 2011. The laboratory performed the analysis via <br /> EPA Method TO-17 using GC/MS in the full scan mode. TO-17 sorbent tubes are thermally desorbed onto <br /> a secondary trap. The trap is thermally desorbed to elute the components into the GC/MS system_ for <br /> further separation. <br /> Receivinp,Notes <br /> A Temperature Blank was included with the shipment. Temperature was measured and was not within <br /> 4±2 °C. Coolant in the form of blue ice was present..-Analysis proceeded. <br /> Analytical Notes <br /> A sampling volume of 1.34 L was used to convert ng to ug/m3 for the associated Lab Blank. <br /> Due to unacceptable linearity of Methylene Chloride in the initial calibration,Methylene Chloride was <br /> removed from the analyte list and cannot be reported. <br /> All Quality Control Limit exceedences 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 Sun-inary page. Target compound <br /> non-detects in the samples that are associated with high bias in QC analyses have not been flagged. <br /> The TPH pattern in all samples did not resemble that of either diesel fuel or gasoline.. <br /> THE WORKORDER WAS REISSUED ON JUNE.14,2011 TO REPORT NAPHTHALENE PER <br /> # CLIENT'S REQUEST. <br /> Definition of Data Oualifyin2 Flats <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 reporting1imit (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 /> Page 3 of 21 <br />