Chapter NR 106

Chapter NR 106

PROCEDURES FOR CALCULATING WATER QUALITY BASED EFFLUENT LIMITATIONS FOR POINT SOURCE DISCHARGES TO SURFACE WATERS

Subchapter I — Applicability

NR 106.01   Purpose.

NR 106.02   Applicability.

NR 106.03   Definitions.

Subchapter II — General Procedures for Effluent Limitations

NR 106.04   General.

NR 106.05   Determination of the necessity for water quality based effluent limitations for toxic and organoleptic substances.

NR 106.06   Calculation of water quality based effluent limitations for toxic and organoleptic substances.

NR 106.07   Application of and compliance with water quality based effluent limitations in permits.

NR 106.08   Determination of the necessity for whole effluent toxicity testing requirements and limitations.

NR 106.09   Whole effluent toxicity data evaluation and limitations.

NR 106.10   Noncontact cooling water additives.

NR 106.11   Multiple discharges.

NR 106.115   Additivity of dioxins and furans.

NR 106.117   Schedules of compliance.

NR 106.14   Analytical methods and laboratory requirements.

Subchapter III — Effluent Limitations for Mercury Discharges

NR 106.145   Mercury regulation.

NR 106.15   Limitations for mercury.

Subchapter IV — Effluent Limitations for Ammonia Discharges

NR 106.30   Applicability.

NR 106.31   Definitions.

NR 106.32   Calculation of water quality-based effluent limitations for ammonia.

NR 106.33   Determination of the necessity for water quality-based effluent limits for ammonia.

NR 106.36   Alternative whole effluent toxicity monitoring for certain discharges of ammonia.

NR 106.37   Schedules of compliance.

Subchapter V — Effluent Limitations for Temperature

NR 106.50   Purpose.

NR 106.51   Applicability.

NR 106.52   Definitions.

NR 106.53   Parameters used to establish water quality-based effluent limitations for temperature.

NR 106.54   Representative effluent temperature data.

NR 106.55   Determination of water quality-based effluent limitations for temperature in WPDES permits.

NR 106.56   Establishment of water quality-based effluent limitations for temperature in WPDES permits.

NR 106.57   Effluent limitations for multiple thermal discharges.

NR 106.58   Effluent limitations based on water quality models.

NR 106.59   Effluent limitations for temperature for permits issued to publicly or privately owned domestic sewage treatment works.

NR 106.60   Effluent limitations for temperature for discharges from new facilities.

NR 106.61   General permit.

NR 106.62   Compliance schedules.

Subchapter VI — Alternative Effluent Limitations for Temperature

NR 106.70   Purpose.

NR 106.71   Definitions.

NR 106.72   Application for alternative effluent limitations for temperature.

NR 106.73   Identification of representative, important species.

NR 106.74   Determination of alternative effluent limitations for temperature.

NR 106.75   Compliance schedules.

NR 106.76   Public notice.

NR 106.77   Application of the variance process in s. 283.15, Stats.

Subchapter VII — Effluent Limitations for Chloride Discharges

NR 106.80   Purpose.

NR 106.81   Applicability.

NR 106.82   Definitions.

NR 106.83   Regulation of chloride discharges.

NR 106.84   Compliance with Wisconsin water quality antidegradation rules when reissuing a permit.

NR 106.85   Determination of the necessity for water quality-based effluent limitations.

NR 106.86   Monitoring.

NR 106.87   Establishment of effluent limitations.

NR 106.88   Application of and compliance with chloride effluent limitations in a permit.

NR 106.89   Alternative whole effluent toxicity monitoring and limitations for dischargers of chloride.

NR 106.90   Source reduction.

NR 106.91   Variances for POTWs which accept wastewater from public water systems treating water to meet primary safe drinking water act standards.

NR 106.92   Authority of a publicly owned treatment works to regulate chloride discharges.

NR 106.93   New discharges.

NR 106.94   Relocation of an existing discharge.

NR 106.95   Multiple discharges.

NR 106.96   Analytical methods and laboratory requirements.

Subchapter VIII — Permit Requirements for PFOS and PFOA Discharges

NR 106.97   Purpose.

NR 106.975   Definitions.

NR 106.98   Determination of the necessity for reducing PFOS and PFOA in discharges.

NR 106.985   PFOS and PFOA minimization plans, permit implementation procedures schedule.

NR 106.99   PFOS and PFOA minimization plans.

NR 106.995   Sampling and laboratory analysis requirements.

NR 106.996   New dischargers or new sources.

Ch. NR 106 Note Note: Corrections made under s. 13.93 (2m) (b) 7., Stats., Register, August, 1997, No. 500.

subch. I of ch. NR 106 Subchapter I — Applicability

NR 106.01 NR 106.01 Purpose. One purpose of this chapter is to specify how the department will calculate water quality based effluent limitations under s. 283.13 (5), Stats., for toxic and organoleptic substances and whole effluent toxicity. The other purpose of this chapter is to specify how the department will decide if and how these limitations will be included in Wisconsin pollution discharge elimination system (WPDES) permits. Water quality based effluent limitations for toxic and organoleptic substances are needed to assure attainment and maintenance of surface water quality standards as established in accordance with s. 281.15 (1), Stats., and as set forth in chs. NR 102 to 105.

NR 106.01 History History: Cr. Register, February, 1989, No. 398, eff. 3-1-89; correction made under s. 13.93 (2m) (b) 7., Stats., Register October 2002 No. 562.

NR 106.02 NR 106.02 Applicability. The provisions of this chapter are applicable to point sources which discharge wastewater containing toxic or organoleptic substances to surface waters of the state.

NR 106.02 History History: Cr. Register, February, 1989, No. 398, eff. 3-1-89.

NR 106.03 NR 106.03 Definitions. The following definitions are applicable to terms used in this chapter.

NR 106.03(1g) (1g) “AMZ” means acute mixing zone concentration based on presence of a zone of initial dilution under s. NR 106.06 (3) (c).

NR 106.03(1r) (1r) “Bioaccumulative chemical of concern” or “BCC” means any substance that has the potential to cause adverse effects which, upon entering the surface waters, accumulates in aquatic organisms by a human health or wildlife bioaccumulation factor greater than 1000.

NR 106.03(2) (2) “Biologically based design flow” means a receiving water design flow to protect fish and aquatic life for which both the duration of exposure is expressed in days and the allowable frequency of excursion is expressed in years. An example of a biologically based design flow is a 4-day 3-year design flow which corresponds to the lowest 4-day average flow that will limit excursions from any water quality criteria or secondary values to no more than once in 3 years.

NR 106.03(2m) (2m) “Deficiency toxicity” means a condition that exists when adverse effects occur to aquatic organisms because concentrations of common ions are too low.