NR 419.045(5)(g) (g) The measurement of wastewater flow rate shall be determined with flow measurement devices. Flow rate measurements shall be taken at the same time as the concentration measurements.

NR 419.045(6) (6) Compliance schedule. The owner or operator of any facility subject to this section shall do all of the following:

NR 419.045(6)(a) (a) Notify the department’s bureau of air management in writing by April 1, 2012 that the facility is subject to the requirements of this section. The notification shall provide the name and location of the affected facility.

NR 419.045(6)(b) (b) Achieve final compliance with the requirements of this section no later than February 1, 2013.

NR 419.045(7) (7) Recordkeeping. The owner or operator of a facility subject to this section shall do all of the following:

NR 419.045(7)(a) (a) Maintain complete and up-to-date records needed to demonstrate compliance with sub. (2) or (3) which are sufficient to demonstrate the characteristics of wastewater streams and the qualification for any exemptions claimed under sub. (1) (b).

NR 419.045(7)(b) (b) Maintain records of the results of any inspection or monitoring conducted in accordance with sub. (4). Records shall be sufficient to demonstrate proper functioning of applicable control equipment to design specifications to ensure compliance with sub. (2) or (3).

NR 419.045(7)(c) (c) Maintain records of the results of any testing conducted in accordance with sub. (5).

NR 419.045(7)(d) (d) Maintain all records at the facility for at least 5 years and make all records available upon request to EPA and the department.

NR 419.045(8) (8) Determination of wastewater characteristics. The determination of the characteristics of a wastewater stream for purposes of this section shall be made as follows:

NR 419.045(8)(a) (a) The characteristics shall be determined at a location between the point where the process wastewater exits a process unit and before the process wastewater is exposed to the atmosphere, treated for VOC removal, or mixed with another wastewater stream. For wastewater streams at a facility meeting the applicability requirements under sub. (1) (a) 1. and 2. and which, prior to February 1, 2012, were either actually being mixed, or construction had commenced which would result in the wastewater streams being mixed, the mixing does not establish a limit on where the characteristics may be determined.

NR 419.045(8)(b) (b) The flow rate of a wastewater stream shall be determined on the basis of an annual average by one of the following methods:

NR 419.045(8)(b)1. 1. The highest annual quantity of wastewater managed, based on historical records for the most recent 5 years of operation, or for the entire time the wastewater stream has existed if less than five years, but at least one year.

NR 419.045(8)(b)2. 2. The maximum design capacity of the waste management unit.

NR 419.045(8)(b)3. 3. The maximum design capacity to generate wastewater of the process unit generating the wastewater stream.

NR 419.045(8)(b)4. 4. Measurements that are representative of the actual, normal wastewater generation rates.

NR 419.045(8)(c) (c) The VOC concentration of a wastewater stream shall be determined on the basis of a flow-weighted annual average by one of the methods in this paragraph, or by a combination of the methods. If the department determines, with written concurrence from EPA, that the VOC concentration cannot be adequately determined by the method in subd.1. or 2., the VOC concentration shall be determined in accordance with subd. 3., or by a combination of the methods in subds. 1., 2., and 3. VOC with a Henry’s Law Constant less than 1.8 x 10-6 atm-m3/mole (0.1 y/x) at 25°C may not be included in the determination of VOC concentration.

NR 419.045(8)(c)1. 1. Sufficient information to document the VOC concentration.

NR 419.045 Note Note: Examples of sufficient information include material balances, records of chemical purchases, or previous test results.

NR 419.045(8)(c)2. 2. Sufficient information to demonstrate that the bench-scale or pilot-scale test concentration data are representative of the actual VOC concentration.

NR 419.045(8)(c)3. 3. Collect a minimum of three representative samples from the wastewater stream and determine the affected VOC concentration for each sample in accordance with sub. (5). The affected VOC concentration of the wastewater stream shall be the flow-weighted average of the individual samples.

NR 419.045(8)(d) (d) The annual affected VOC loading in wastewater for a wastewater stream shall be the annual average flow rate determined in par. (b) multiplied by the annual average affected VOC concentration determined in par. (c).

NR 419.045(8)(e) (e) The annual VOC loading in wastewater for a facility shall be the sum of the annual VOC loading in wastewater for each affected VOC wastewater stream.

NR 419.045(9) (9) Maintenance wastewater requirements. Each owner or operator of a source subject to this section shall comply with the following requirements for maintenance wastewaters containing volatile organic compounds:

NR 419.045(9)(a) (a) The owner or operator shall prepare a description of maintenance procedures for management of wastewaters generated from the emptying and purging of equipment in the process during temporary shutdowns for inspections, maintenance, and repair and during periods which are not shutdowns. The descriptions shall specify all of the following:

NR 419.045(9)(a)1. 1. The process equipment or maintenance tasks that are anticipated to create wastewater during maintenance activities.

NR 419.045(9)(a)2. 2. The procedures that will be followed to properly manage the wastewater and control VOC emissions to the atmosphere.

NR 419.045(9)(a)3. 3. The procedures to be followed when clearing materials from the process equipment.

NR 419.045(9)(b) (b) The owner or operator shall modify and update the information required by par. (a) as needed following each maintenance procedure based on the actions taken and the wastewaters generated in the preceding maintenance procedure.