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ti% eurofins <br /> Air Toxics <br /> LABORATORY NARRATIVE <br /> EPA Method TO-15 <br /> SCS Field Services <br /> Workorder#2303093 <br /> Ten 1 Liter Summa Canister samples were received on March 03, 2023. The laboratory performed <br /> analysis via EPA Method TO-15 using GUMS in the full scan mode. <br /> Receiving Notes <br /> The Chain of Custody(COC) information for samples GW-2D, GW-1D, GW-9D, GW-8D, GW-7I, <br /> GW-7S, GW-6D, GW-5S, GW-41, and GW-31 did not match the entries on the sample tags with regard to <br /> sample identification. Therefore the information on the COC was used to process and report the samples. <br /> The Chain of Custody(COC) information for sample GW-6D did not match the information on the <br /> canister with regard to canister barcode. The sample labeled 27416 on the COC is labeled as 34002500 on <br /> the canister. The client was notified of the discrepancy and the information on the canister was used to <br /> process and report the sample. <br /> Analytical Notes <br /> Dilution was performed on sample GW-6D due to the presence of high level target species. <br /> Definition of Data Qualifying Flags <br /> Ten 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, LOD, or MDL value. See <br /> data page for project specific U-flag definition. <br /> UJ-Non-detected compound associated with low bias in the CCV <br /> N- The identification is based on presumptive evidence. <br /> M - Reported value may be biased due to apparent matrix interferences. <br /> CN - See Case Narrative. <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 42 <br />