3003 W CASINO RD PAINT HANGAR BOUNDARIES 2023-07-20

LTC; Gemnus Boeing Project Contract No.EVE-16-2929 Technologyi Development CEI Project No. 160731 3.3.2 LEL Measured Data Volatile concentration measurements from Hangar 45-04 are available for direct comparison. Measurements taken in Hangars 45-04 [5] are shown in Figure 46. Details on the specifics of the PPM and % of LEL measurements are difficult to determine from the reference, but the % of LEL measurements are still useful in checking the CFD-derived values for consistency— i.e., are the CFD-generated % of LEL values in the same range overall at approximately the same measurement locations. A comparison can be made with the following caveats: • Differences in the painting process during the measurements and CFD computations: The CFD model assumes a clear coat being applied in the 45-04 while the % of LEL measurements were taken during primer application in the 45-04 and one point during solvent cleaning in 45-04. The Primer constituents used during % of LEL measurements are described as "The primer is a blend of a proprietary epoxy resin, crystalline silica, strontium chromate, methyl amyl ketone (heptan-2-one), xylene (dimethylbenzene), methyl isobutyl ketone (4- Methyl-2-pentanone, Isopropylacetone, Hexone, Isobutyl methyl ketone, 2- Methylpropyl methyl ketone, 4-Methyl-2-oxopentane, MIK, Isobutylmethyl ketone, MIBK, or Isohexanone) and aluminum oxide" [5]. Volume or weight fractions are not specified. Thus the primer in use during % of LEL measurements does contain heptan-2-one and other flammable compounds. • Differences in where the stackers (and paint application) were located between the 45-04 simulation and the 45-04 measurements 50