Air Sciences

Response to US EPA comment #524-20, "While the Draft EIS relied on [a dispersion] analysis contained in the Resolution Copper Project NEPA Air Quality Impacts Analyses, we are concerned that it may have underestimated PM10, as well as PM2.5, emissions.[...]"

In order to address specific matters included in comments on the DEIS, the TNF has requested more specific information pertaining to reasonably foreseeable HAPs emissions and, as applicable, associated potential health effects.

This Modeling Report includes a description of the methods and datasets used in the air quality modeling analyses to estimate the Resolution Project’s air quality impacts relative to the applicable Ambient Air Quality Standards (AAQS) for criteria pollutants and to Air Quality Related Values (AQRV) in the near-field domain and in several Class I Wilderness Areas in the far-field domain.

This modeling plan includes a description of the methods and data sets that are planned to be used in the air quality modeling analyses to estimate the Resolution Project’s air quality impacts relative to the applicable Ambient Air Quality Standards (AAQS) for criteria pollutants and to Air Quality Related Values (AQRV) in the near-field domain.