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Show 0.8 T 0.7 -- 0.6 -• 0.5 -• 0.4 •- 0.3 + 10 20 j(f([NOJ),g(iic)) HYDROCARBONS ALDEHYDES CO 30 40 [NOJ (ppm) 50 1.E+06 1.E+04 ° < E 1.E+02 1.E+O0 UJ U z O u Fig. 7. Pollutant concentrations and performance function J vs. NO, levels. Inclusion of VOCs in the Performance Function To better address concerns regarding the release of HAPs and OPs from stationary combustion systems, the J function should include a component incorporating VOC emission levels. The form of the VOC function, fc(VOC), should reflect existing regulations and, as a result, could be divided into two subfunctions, one for HAPs (hnAPs) and one for OPs (h0ps). Regulations for HAPs, based on the toxic risk of individual compounds, are calculated in terms of total annual mass emissions. By the year 2000, the USEPA must regulate all new and existing major industrial HAP sources. A major source is defined as any site emitting 10 imperial tons per year (tpy) of a single HAP or 25 tpy of all HAPs combined. Thus, h^p, could be based on projections of total annual mass emissions of the target VOCs. The USEPA regulatory can be converted into volumetric concentrations by assuming operation of the burner all day and all year at a load of 1.5 MW (Le., the maximum industrial load regulated by the SCAQMD Rule 1146.1 for the type of system modeled by the burner in this study). This approach assumes that non- 12 |
