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profile was adjusted for abnormally high sulfur emissions that were erroneous for typical underground <br /> mining operations. The modelled emissions details are provided in the CARMMS report as defined in <br /> Appendix D and D-1 (Environ 2015). <br /> Although the predicted impacts are based on a future model year emission (2025),the differences in the <br /> impacts between the scenarios and the base year provide insight into how mass emission changes impact <br /> the atmosphere on a relative basis and are thus useful for making qualitative and quantitative <br /> comparisons with emissions levels at the current pace of development. <br /> The results(Figure 2.2-2)show that 24-hr PM2.5 emission impacts are primarily the result of surface mining <br /> facilities in the northern portion of the CARMMS analysis domain. In general, primary PM (the kind the <br /> mines emit) is a localized pollutant. The 2.5 miles (4-km) grid resolution of the model is less sensitive to <br /> settling and terrain impacts (i.e., plume depletion) for primary PM than a nearfield model would show. <br /> Although the PM concentrations are a bit high due to the model resolution, they are reasonable across <br /> the larger domain. The PM contributions from all the mines appears to be low around the King II Mine <br /> facility (not more than 0.4µg/m3 for PM10 and 0.2µg/m3 for PM2.5).The other pollutants (NO2 and 03) are <br /> also equally minor impactors, although we note that the 03 predictions are a function of the mine's direct <br /> NOX and VOC contributions and does not include CMM VOCs since they are unknown. <br /> Dunn Ranch Area LBA and Mining Plan Modification 30 <br /> Technical Resources Report <br />