Issuance of permits

Issuance of permits. (1) The department shall determine whether a general permit or an individual permit will be used to authorize coverage for each applicant, group of co-applicants or regional authority. The department may exclude co-applicants from coverage under an individual permit, and instead issue a separate individual permit to an excluded co-applicant if coverage is necessary to ensure compliance with this subchapter. (2) For each applicant or permittee subject to a US EPA-approved TMDL, the department shall include in the permit an expression of the wasteload allocation, or may derive a percent reduction for the pollutant of concern, consistent with the wasteload allocation and assumptions contained in the US EPA-approved TMDL that is designed to achieve water quality standards. If applicable, the TMDL-based percent reduction for TSS shall be included in a permit in addition to the requirements under s. NR 151.13 (2) (b) . (3) For each applicant or permittee discharging to an impaired water for which a TMDL is under development at the time of permit issuance, the department may include in the permit a requirement to begin development of a TMDL implementation plan once the TMDL is approved. Implementation will not be required until the permit term following TMDL approval.