NR 106.10(1)(1) For toxic and organoleptic substances commonly added by suppliers of drinking water systems and present in the noncontact cooling water, a water quality based effluent limitation calculated under s. NR 106.06 that is based on the applicable water quality criterion or secondary value shall be included in the permit unless the permittee demonstrates at least one of the following: NR 106.10(1)(a)(a) The concentration of the substance in the intake water is dissipated within the system that supplies the intake water to the permittee and is consistently less than the water quality based effluent limitation. NR 106.10(1)(b)(b) An effluent limitation is not necessary as determined using the reasonable potential procedures in s. NR 106.05. NR 106.10(1)(c)(c) Prior to reaching the receiving water, the substance dissipates or is removed to a level that is below the water quality based effluent limitation. NR 106.10(2)(2) For other toxic and organoleptic substances intentionally added to noncontact cooling water by the permittee, the department shall follow the procedures specified in ss. NR 106.05 and 106.06 to calculate a water quality based effluent limitation and determine whether the limitation is necessary in the permit. If there is no water quality criterion for an additive and there are potential water quality impacts from the additive, the department shall establish a secondary value for the additive in accordance with ch. NR 105 and calculate a limitation based on that value. All of the following requirements apply to the use and discharge of additives: NR 106.10(2)(a)(a) A permittee shall obtain written approval from the department prior to use of the additive. NR 106.10(2)(b)(b) A permittee shall provide the department with dosage information and safety data sheets and toxicological data, as requested by the department to meet minimum data requirements specified in ss. NR 105.05 (4) and 105.06 (6) for each additive for which approval is sought. NR 106.10(2)(c)(c) Prior to increasing the usage of an additive in amounts greater than authorized by the department, a permittee shall get written approval from the department for the increased usage. NR 106.10(2)(d)(d) After reissuance, if a permittee wants to use a new additive not previously approved by the department, the permittee shall get written approval from the department prior to use of the additive. NR 106.10(2)(e)(e) A permittee may only use additives in accordance with the conditions of the department approval and any applicable permit terms. If the department does not approve use of the additive, the additive may not be discharged. NR 106.10 HistoryHistory: Cr. Register, February, 1989, No. 398, eff. 3-1-89; am. (1) (a), (b) and (2), cr. (1) (d), August, 1997, No. 500, eff. 9-1-97; CR 03-050: am. (1) (intro.) Register February 2004 No. 578, eff. 3-1-04; CR 15-084: r. and recr. Register August 2016 No. 728, eff. 9-1-16; correction in (2) (intro.) made under s. 35.17, Stats., Register August 2016 No. 728. NR 106.11NR 106.11 Multiple discharges. Whenever the department determines that more than one discharge may be affecting the water quality of the same receiving water for one or more substances, the provisions of this chapter shall be used to calculate the combined allowable load from the discharges necessary to meet the water quality criteria for the substances. The resultant combined allowable load shall be divided among the various discharges using an allocation method based on site-specific considerations. Whenever the department makes a determination under this section, the department shall notify all permittees who may be affecting the water quality of the same receiving water of the determination and any limitations developed under this section. Permittees shall be given the opportunity to comment to the department on any determination made under this section. NR 106.11 NoteNote: The method of allocating the combined allowable load in s. NR 106.11 is not required to be based on the effluent flow rates specified in s. NR 106.06 (4) (d). NR 106.115NR 106.115 Additivity of dioxins and furans. The 2,3,7,8-TCDD toxicity equivalence concentration in effluent shall be used when developing waste load allocations and for purposes of establishing water quality based effluent limits. NR 106.115(1)(1) For the chlorinated dibenzo-p-dioxins (CDDs) listed in Tables 8 and 9 in ch. NR 105, the potential adverse additive effects of all dioxin (CDD) and chlorinated dibenzofuran (CDF) congeners in effluents shall be accounted for as specified in this section. NR 106.115(2)(2) The Toxicity Equivalency Factor (TEF) in Table 1 and Bioaccumulation Equivalency Factor (BEF) in Table 2 shall be used when calculating a 2,3,7,8-TCDD toxicity equivalence concentration in effluent to be used when implementing both human health noncancer and cancer criteria. The chemical concentration of each CDD and CDF in effluent shall be converted to a 2,3,7,8-TCDD toxicity equivalence concentration in effluent by using the following equation: (TEC)tcdd = S (C)x (TEF)x (BEF)x
where:
(TEC)tcdd = 2,3,7,8-TCDD toxicity equivalence
concentration in effluent
(C)x = concentration of total chemical x in effluent
(TEF)x = TCDD toxicity equivalency factor for x from table 1
(BEF)x = TCDD bioaccumulation equivalency factor for x from table 2
Table 1 — Toxicity Equivalency Factor for
CDDS and CDFs
Table 2 — Bioaccumulation Equivalency Factor
for CDDs and CDFs
NR 106.115 HistoryHistory: Cr. Register, August, 1997, No. 500, eff. 9-1-97; CR 03-050: renum. from NR 106.16 Register February 2004 No. 578, eff. 3-1-04; CR 09-123: am. (1) Register July 2010 No. 655, eff. 8-1-10; CR 15-085: am. Table 1 (title), Table 2 (title) Register August 2016 No. 728, eff. 9-1-16.
