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area are depicted in Figure 2.2-1. The closest Oa monitoring is in El Paso County to the north, which is <br /> going to be more highly influenced(if not totally)by the Colorado Springs metropolitan area versus Pueblo <br /> area emissions sources. Air quality within the Project Area and within the vicinity of the indirect sources <br /> is generally considered good, and all identified areas are currently in attainment status for all criteria <br /> pollutants. <br /> As stated above, air quality for any given area is influenced in part by the amount of pollutants released <br /> within and upwind of the area of interest (i.e., emissions loading). The following National Emissions <br /> Inventory(NEI) Data (EPA 2014) presented in Table 2.2-4 shows the amount of pollutants released within <br /> the Project and indirect source areas.Combined with the available monitoring data shown above, readers <br /> can get a sense of the localized atmospheric response to the emissions loading occurring near the ambient <br /> air quality monitors. The NEI data by default includes all the Project and indirect source emissions (as <br /> shown below), as these sources and supporting emissions generating activities have been in existence for <br /> several NEI reporting periods (the NEI is produced every 3 years). Despite this fact, the areas remain in <br /> attainment for all the NAAQS. <br /> 2.2.1.4 Hazardous Air Pollutants <br /> HAPs are those pollutants that are known or suspected to cause cancer or other serious health effects, <br /> such as reproductive effects or birth defects, or adverse environmental effects. CAA Sections 111 and 112 <br /> establish mechanisms for controlling HAPs from stationary sources, and the USEPA is required to control <br /> emissions of 187 HAPs. Ambient air quality standards do not exist for HAPs; however, mass-based <br /> emissions limits and risk-based exposure thresholds have been established as significance criteria to <br /> require maximum achievable control technologies under the USEPA promulgated NESHAP Air Pollutants <br /> for 96 industrial source classes. <br /> Many HAPs originate from stationary sources(e.g.,factories, refineries, power plants)and mobile sources <br /> (e.g., cars,trucks, buses), as well as indoor sources (building materials and cleaning solvents). Most HAPs <br /> emitted from the Project would be the result of vehicle use.The largest components of the HAPs emissions <br /> from these sources are typically various benzene compounds and formaldehyde. The major source <br /> threshold for HAPs is 10 tpy of any one HAP or 25 tpy of aggregate HAPs. Most of the HAPs emitted from <br /> the King II Mine's operations are the result of the on and off-road vehicle use.The largest components of <br /> the HAPs emissions from these sources are typically various benzene compounds and formaldehyde. <br /> Dunn Ranch Area LBA and Mining Plan Modification 9 <br /> Technical Resources Report <br />