(1) TOXIC EFFLUENT LIMITATIONS AND STANDARDS. (a) List. The department shall promulgate by rule a list of toxic pollutants or combinations of pollutants subject to this chapter which consists of those toxic pollutants referred to in table 1 of committee print number 95-30 of the committee on public works and transportation of the U.S. house of representatives. After promulgation of this list, the department may revise by rule the list periodically and may add to or remove from the list any pollutant. In revising this list the department shall consider the toxicity of the pollutant, its persistence, degradability, the usual or potential presence in any waters of any organisms affected by the discharge of the toxic pollutant or combination of pollutants, the importance of the affected organism and the nature and extent of the effect of the toxic pollutant on these organisms. A determination by the department under this subsection is subject to declaratory judgment proceedings under s. 227.40. (b) Effluent standards. The department may promulgate by rule an effluent standard, which may include a prohibition, establishing requirements for a toxic pollutant which, if an effluent limitation is applicable to a class or category of point sources, is applicable to that category or class of point sources only if this effluent standard imposes more stringent requirements than are imposed under s. 283.13 (2) (b). An effluent standard promulgated under this section shall take into account the toxicity of the pollutant, its persistence, degradability, the usual or potential presence of affected organisms in any waters, the importance of affected organisms, the nature and extent of the effect of the toxic pollutant on these organisms and the extent to which effective control is being or may be achieved under other regulatory authority. (c) Promulgation; review. The department shall promulgate by rule an effluent standard which may include a prohibition in accordance with par. (a) for each toxic pollutant referred to in table 1 of committee print number 95-30 of the committee on public works and transportation of the U.S. house of representatives as soon as practicable but no later than one year after the U.S. environmental protection agency promulgates an effluent standard for the pollutant. The department shall establish effluent standards for any other toxic pollutant listed under par. (a) as soon as practicable after it is listed. Each effluent standard promulgated under this paragraph shall be reviewed and, if appropriate, revised every 3 years. (d) Ample margin of safety. An effluent standard promulgated under this subsection shall be established at that level which the department determines provides an ample margin of safety. (e) Applicability to classes or categories of sources. If the department proposes or promulgates an effluent standard under this subsection, it shall designate the class or category of point sources to which the effluent standard applies. The department may include the disposal of dredged material in a class or category of point sources. (f) Effective date. An effluent standard promulgated under this subsection takes effect on the date specified in the order promulgating the standard, but not more than one year after the date of the order. If the department determines that compliance within one year after the date of the order is technologically infeasible for a class or category of sources, the department may establish the effective date for the effluent standard for that class or category of sources at the earliest date upon which compliance can be feasibly attained by those sources, but in no case more than 3 years after the date of the order. (g) Procedure for promulgation in absence of federal standards. In promulgating rules establishing a toxic effluent standard or prohibition for which the U.S. environmental protection agency has not promulgated a toxic effluent limitation, standard or prohibition, the department shall follow the additional procedures specified in s. 283.11 (4) (d). (2) PRETREATMENT STANDARDS. (a) The department shall by rule promulgate pretreatment standards to regulate the introduction into publicly owned treatment works of pollutants which are not susceptible to treatment by such treatment works or which would interfere with the operation of such treatment works. (b) Pretreatment standards promulgated under this section shall specify a time for compliance, not to exceed 3 years after the date of promulgation, and shall be established to prevent the discharge through any publicly owned treatment work of any pollutant which interferes with, passes through, or otherwise is incompatible with the treatment works. If any toxic pollutant under sub. (1) is introduced by a source into a publicly owned treatment works, if the treatment by the works removes all or any part of that toxic pollutant, if the discharge from the works does not violate the effluent limitation or standard which would be applicable to that toxic pollutant if it were discharged by the source other than through a publicly owned treatment works and if the treatment of that toxic pollutant does not prevent sludge use or disposal by the works in accordance with section 1345 of the federal water pollution control act, as amended, 33 USC 1251 to 1376, then the pretreatment requirements for the sources actually discharging the toxic pollutant into the publicly owned treatment works may be revised by the owner or operator of the works to reflect the removal of that toxic pollutant by the works. (c) The department shall by rule promulgate the classes or categories of sources to which the pretreatment standards adopted under this section shall apply. (d) The department shall revise the pretreatment standards adopted under this section to reflect changes in control technology, processes, operating methods or other alternatives.
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