(1) STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES.
(a) Similar to federal standard. If a standard of performance for new stationary sources is promulgated under section 111 of the federal clean air act, the department shall promulgate by rule a similar emission standard, including administrative requirements that are consistent with the federal administrative requirements, but this standard may not be more restrictive in terms of emission limitations than the federal standard except as provided under sub. (4).
(b) Standard to protect public health or welfare. If a standard of performance for any air contaminant for new stationary sources is not promulgated under section 111 of the federal clean air act, the department may promulgate an emission standard of performance for new stationary sources if the department finds the standard is needed to provide adequate protection for public health or welfare.
(c) Restrictive standard. The department may impose a more restrictive emission standard of performance for a new stationary source than the standard promulgated under par.
(a) or (b) on a case-by-case basis if a more restrictive emission standard is needed to meet the applicable lowest achievable emission rate under s. 285.63 (2)
(b) or to install the best available control technology under s. 285.63 (3) (a).
(2) EMISSION STANDARDS FOR HAZARDOUS AIR CONTAMINANTS.
(a) Similar to federal standard. If an emission standard for a hazardous air contaminant is promulgated under section 112 of the federal clean air act, the department shall promulgate by rule a similar standard, including administrative requirements that are consistent with the federal administrative requirements, but this standard may not be more restrictive in terms of emission limitations than the federal standard except as provided under sub. (4).