NR 463.07(5)(b)(b) On and after the date on which the initial performance test is required to be completed under s. NR 460.06, the owner or operator of an affected source shall monitor the surface tension of the electroplating or anodizing bath. Operation of the affected source at a surface tension greater than the value established during the performance test or greater than 45 dynes/cm (3.1 x 10-3 lbf /ft) as measured by a stalagmometer or 35 dynes/cm (2.4 x 10-3 lbf /ft) as measured by a tensiometer if the owner or operator is using this value in accordance with par. (a), shall constitute noncompliance with the standards in s. NR 463.04. The surface tension shall be monitored according to the following schedule:

NR 463.07(5)(b)1.1. The surface tension shall be measured once every 4 hours during operation of the tank with a stalagmometer or a tensiometer as specified in Method 306B in Appendix A of 40 CFR part 63, incorporated by reference in s. NR 484.04.

NR 463.07(5)(b)2.2. The time between monitoring may be increased if there have been no exceedances. The surface tension shall be measured once every 4 hours of tank operation for the first 40 hours of tank operation after the compliance date. Once there are no exceedances during 40 hours of tank operation, surface tension measurement may be conducted once every 8 hours of tank operation. Once there are no exceedances during 40 more hours of tank operation, surface tension measurement may be conducted once every 40 hours of tank operation on an ongoing basis, until an exceedance occurs. The minimum frequency of monitoring allowed by this subchapter is once every 40 hours of tank operation.

NR 463.07(5)(b)3.3. Once an exceedance occurs as indicated through surface tension monitoring, the original monitoring schedule of once every 4 hours shall be resumed. A subsequent decrease in frequency shall follow the schedule laid out in subd. 2. For example, if an owner or operator had been monitoring an affected source once every 40 hours and an exceedance occurs, subsequent monitoring would take place once every 4 hours of tank operation. Once an exceedance does not occur for 40 hours of tank operation, monitoring may occur once every 8 hours of tank operation. Once an exceedance does not occur for 40 hours of tank operation on this schedule, monitoring may occur once every 40 hours of tank operation.

NR 463.07(5)(c)(c) Once a bath solution is drained from the affected tank and a new solution added, the original monitoring schedule of once every 4 hours shall be resumed, with a decrease in monitoring frequency allowed following the procedures of par. (b) 2. and 3.

NR 463.07(6)(a)(a) During the initial performance test, the owner or operator of an affected source complying with the emission limitations in s. NR 463.04 through the use of a foam blanket in the electroplating or anodizing bath shall determine the outlet chromium concentration using the procedures in s. NR 463.09 (3), and shall establish as the site-specific operating parameter the thickness of the foam blanket, setting the minimum thickness that corresponds to compliance with the applicable emission limitation. In lieu of establishing the minimum foam blanket thickness during the performance test, the owner or operator may accept 2.54 centimeters (1 inch) as the minimum foam blanket thickness that corresponds to compliance with the applicable emission limitation. All foam blanket measurements shall be taken in close proximity to the workpiece or cathode area in the plating tank.

NR 463.07(6)(b)(b) On and after the date on which the initial performance test is required to be completed under s. NR 460.06, the owner or operator of an affected source shall monitor the foam blanket thickness of the electroplating or anodizing bath. Operation of the affected source at a foam blanket thickness less than the value established during the performance test, or less than 2.54 cm (1 inch) if the owner or operator is using this value in accordance with par. (a), constitutes noncompliance with the standards in s. NR 463.04. The foam blanket thickness shall be measured according to the following schedule:

NR 463.07(6)(b)2.2. The time between monitoring may be increased if there have been no exceedances. The foam blanket thickness shall be measured once every hour of tank operation for the first 40 hours of tank operation after the compliance date. Once there are no exceedances for 40 hours of tank operation, foam blanket thickness measurement may be conducted once every 4 hours of tank operation. Once there are no exceedances during 40 more hours of tank operation, foam blanket thickness measurement may be conducted once every 8 hours of tank operation on an ongoing basis, until an exceedance occurs. The minimum frequency of monitoring allowed by this subchapter is once per 8 hours of tank operation.

NR 463.07(6)(b)3.3. Once an exceedance occurs as indicated through foam blanket thickness monitoring, the original monitoring schedule of once every hour shall be resumed. A subsequent decrease in frequency shall follow the schedule laid out in subd. 2. For example, if an owner or operator had been monitoring an affected source once every 8 hours and an exceedance occurs, subsequent monitoring would take place once every hour of tank operation. Once an exceedance does not occur for 40 hours of tank operation, monitoring may occur once every 4 hours of tank operation. Once an exceedance does not occur for 40 hours of tank operation on this schedule, monitoring may occur once every 8 hours of tank operation.

NR 463.07(6)(c)(c) Once a bath solution is drained from the affected tank and a new solution added, the original monitoring schedule of once every hour shall be resumed, with a decrease in monitoring frequency allowed following the procedures of par. (b) 2. and 3.

NR 463.07(7)(a)(a) If the owner or operator of an affected source uses both a fume suppressant and add-on control device and both are needed to comply with the applicable emission limit, monitoring requirements as identified in subs. (1) to (6), and the work practice standards of Table 1 of this subchapter, apply for each of the control techniques used.

NR 463.07(7)(b)(b) If the owner or operator of an affected source uses both a fume suppressant and add-on control device, but only one of these techniques is needed to comply with the applicable emission limit, monitoring requirements as identified in subs. (1) to (6), and work practice standards of Table 1 of this subchapter, apply only for the control technique used to achieve compliance.

NR 463.07(8)(a)(a) Requests and approvals of alternative monitoring methods shall be considered in accordance with s. NR 460.07 (6).

NR 463.07(8)(b)(b) After receipt and consideration of an application for an alternative monitoring method, the department may approve alternatives to any monitoring methods or procedures of this subchapter including, but not limited to, the following:

NR 463.07(8)(b)1.1. Alternative monitoring requirements when installation or use of monitoring devices specified in this subchapter would not provide accurate measurements due to interferences caused by substances within the effluent gases.

NR 463.07(8)(b)2.2. Alternative locations for installing monitoring devices when the owner or operator can demonstrate that installation at alternate locations will enable accurate and representative measurements.

NR 463.07 HistoryHistory: Cr. Register, September, 1997, No. 501, eff. 10-1-97; CR 05-039: am. (1) (a), (b), (5) (a), (b) (intro.) and (7) (b), cr. (1) (c) and (d) Register February 2006 No. 602, eff. 3-1-06; CR 04-023: am. (intro.), (5) (b) 2., (6) (b) 2., (7) (a), (8) (b) (intro.) and 1. Register December 2008 No. 636, eff. 1-1-09.

NR 463.08NR 463.08 Alternative control devices. An owner or operator who uses an air pollution control device not listed in s. NR 463.07 shall submit a description of the device, test results collected in accordance with s. NR 463.09 (3) verifying the performance of the device for reducing chromium emissions to the atmosphere to the level required by this subchapter, a copy of the operation and maintenance plan referenced in s. NR 463.05 including proposed work practice standards, and appropriate operating parameters that will be monitored to establish continuous compliance with the standards in s. NR 463.04. The monitoring plan submitted identifying the continuous compliance monitoring is subject to the department’s approval.

NR 463.09(1)(1) Performance test requirements. Performance tests shall be conducted using the test methods and procedures in this section and s. NR 460.06. The test plan to be followed shall be made available to the department prior to the testing, if requested. Performance test results shall be documented in complete test reports that contain all of the following information: