Section R307-406-2 - Source Review(1) The director shall review any new major source or major modification proposed in either an attainment area or area of nonattainment area for the impact of its emissions on visibility in any mandatory Class I area. As a condition of any approval order issued to a source under R307-401, the director shall require the use of air pollution control equipment, technologies, methods or work practices deemed necessary to mitigate visibility impacts in Class I areas that would occur as a result of emissions from such source. The director shall take into consideration as a part of the review and control requirements: (a) the costs of compliance;(b) the time necessary for compliance;(c) the energy usage and conservation;(d) the non air quality environmental impacts of compliance;(e) the useful life of the source; and(f) the degree of visibility improvement which will be provided as a result of control.(2) In determining visibility impact by a major new source or major modification, the director shall use, the procedures identified in the EPA publication "Workbook For Estimating Visibility Impacts" (EPA 450-4-80-031 ) November 1980, or equivalent.(3) The director shall insure that source emissions will be consistent with making reasonable progress toward the national visibility goal referred to in 40 CFR, 51.300(a).Utah Admin. Code R307-406-2