The potential-to-emit (PTE) calculation for the Critical Mass Laboratory (209-E) exhaust stack, which was developed around 1992, was questioned by the Washington Department of Health (WDOH). WDOH issued a notice of assurance of discontinuance and a commitment was made in the subsequent reply to develop a new PTE. Samples were obtained from the pre-filters and the first bank of HEPA filters in the 209-E exhaust system and analyzed per the sampling and analysis plan (LeBaron 2005). The sample information from the exhaust pre-filters and the first bank of HEPA filters provided in Table 5 will be used to develop a PTE. If the PTE shows that the stack emissions are greater than 0.1 mrem/year, the stack will be designated as a major stack. If the PTE shows that the stack emissions are less than 0.1 mrem/year, the stack will be designated as a minor stack.
Revised: October 25, 2005 |
Published: June 17, 2005