NR 211.15(4)(b)6.6. In the event that a waived pollutant is found to be present or is expected to be present based on changes that occur in the user’s operations, the user shall immediately comply with the monitoring requirements of par. (a) or other more frequent monitoring requirements and notify the control authority.

NR 211.15(4)(c)(c) The control authority may reduce the frequency of the reports required under par. (a) to no less than once per year, unless required more frequently by the pretreatment standard or the department, where the industrial user meets all of the following conditions:

NR 211.15(4)(c)1.a.a. 0.01 percent of the design dry weather hydraulic capacity of the POTW, or 5,000 gallons per day, whichever is smaller, as measured by a continuous effluent flow monitoring device unless the industrial user discharges in batches;

NR 211.15(4)(c)1.c.c. 0.01 percent of the maximum allowable headworks loading for any pollutant regulated by the applicable categorical pretreatment standard for which approved local limits were developed by a POTW in accordance with s. NR 211.10 (3);

NR 211.15(4)(c)3.3. The industrial user does not have daily flow rates, production levels, or pollutant levels that vary so significantly that decreasing the reporting requirement would result in data that are not representative of conditions occurring during the reporting period;

NR 211.15(4)(c)4.4. The industrial user shall notify the control authority immediately of any changes at its facility causing it to no longer meet conditions of subd. 1. or 2. Upon notification, the industrial user shall immediately begin complying with the minimum reporting requirements in par. (a); and

NR 211.15(4)(c)5.5. The control authority shall retain documentation to support the determination that a specific industrial user qualifies for reduced reporting requirements under this paragraph for a period of 3 years after the expiration of the term of the control mechanism.

NR 211.15(4)(d)(d) The control authority may determine that an industrial user subject to categorical pretreatment standards is a non-significant categorical industrial user rather than a significant industrial user on a finding that all of the following conditions are met:

NR 211.15(4)(d)1.1. The industrial user never discharges more than 100 gallons per day of total categorical wastewater, excluding sanitary, non-contact cooling and boiler blowdown wastewater, unless specifically included in the pretreatment standard.

NR 211.15(4)(d)4.4. The industrial user annually submits the following certification statement signed in accordance with the signatory requirements of s. NR 211.15 (10) along with any additional information required by the control authority:

Based on my inquiry of the person or persons directly responsible for managing compliance with pretreatment standards, I certify that, to the best of my knowledge and belief that during the period from [insert month, day, year] to [insert month, day, year], the facility described as [insert facility name] met the definition of a non-significant categorical industrial user as described in s. NR 211.15 (4) (d); the facility complied with all applicable pretreatment standards and requirements during this reporting period; and the facility never discharged more than 100 gallons of total categorical wastewater on any given day during this reporting period. This compliance certification is based upon the following information: [list information supporting the facility’s classification as a non-significant categorical industrial user].

NR 211.15(5)(5) Significant industrial users which are not subject to categorical pretreatment standards and which discharge to a POTW with a pretreatment program shall submit reports to the control authority at least twice per year. At a minimum, these reports shall describe the flow rate and concentration of pollutants in wastewater discharges, and shall be based on sampling and analysis performed in the period covered by the report. Sampling shall be conducted at the appropriate sampling location and shall be representative of conditions during the reporting period. If a user monitors any regulated pollutant more frequently than required by the control authority using procedures prescribed in sub. (8), the results of this monitoring shall be included in the report. In cases where a local limit requires compliance with best management practices or pollution prevention alternative, the user shall submit documentation required by the control authority to determine the compliance status of the user. Other industrial users not subject to categorical pretreatment standards shall submit reports according to the requirements of the control authority.

NR 211.15(6)(6) The industrial user shall notify the control authority, and the POTW if the POTW is not the control authority, in advance of any substantial change in the volume or character of the pollutants in the discharge, including changes in listed or characteristic hazardous wastes for which the industrial user has submitted initial notification according to s. NR 211.17. Industrial users shall immediately notify the POTW of any discharge that could cause problems at the POTW, such as any slug loading in violation of s. NR 211.10 (2) or of any changes at the facility affecting the potential for a slug discharge and the need for a slug control plan as required by s. NR 211.235 (4) (a).

NR 211.15(7)(7) If sampling and analysis performed by an industrial user indicates a violation, the industrial user shall notify the control authority within 24 hours of becoming aware of the violation. The industrial user shall repeat the sampling and analysis and submit the results of the repeat analysis to the control authority within 30 days after becoming aware of the violation, unless the control authority regularly performs sampling at the industrial user at least once per month or performed sampling at the industrial user between the time of the industrial user’s initial sampling and the time when the industrial user received the results of the initial sample. Where the control authority has performed the original sampling and analysis in lieu of the industrial user as allowed in sub. (9), the control authority shall perform the repeat sampling and analysis unless it notifies the user of the violation and requires the user to perform the repeat analysis.

NR 211.15(8)(a)(a) Analysis of the samples required by this section shall be performed in accordance with ch. NR 219. Laboratory test results for radiological samples submitted by the industrial user to the department shall be performed by a laboratory approved by the department of agriculture, trade and consumer protection. Other laboratory test results submitted by the industrial user to the department shall be performed by a laboratory certified or registered under ch. NR 149. Sample results submitted by the industrial user to the POTW need not be from a certified or registered laboratory. The following tests are excluded from this requirement: