Ti is the total amount of feed, or aluminum produced, for emission unit i for the 24-hour period (tons or Mg)

ER i is the measured emission rate for emission unit i as determined in the performance test (lb/ton or mg/Mg of feed or charge)

n is the number of emission units in the secondary aluminum processing unit

NR 463.15(20)(e) (e) Calculate and record the 3-day, 24-hour rolling average for each pollutant each day by summing the daily emission rates for each pollutant over the 3 most recent consecutive days and dividing by 3.

NR 463.15(21) (21) Secondary aluminum processing unit compliance by individual emission unit demonstration. As an alternative to the procedures of sub. (20), an owner or operator may demonstrate, through performance tests, that each individual emission unit within the secondary aluminum production unit is in compliance with the applicable emission limits for the emission unit.

NR 463.15(22) (22) Alternative monitoring method for lime addition. The owner or operator of a lime-coated fabric filter that employs intermittent or noncontinuous lime addition may apply to the department for approval of an alternative method for monitoring the lime addition schedule and rate based on monitoring the weight of lime added per ton of feed or charge for each operating cycle or time period used in the performance test. An alternative monitoring method may not be approved unless the owner or operator provides assurance through data and information that the affected source will meet the relevant emission standards on a continuous basis.

NR 463.15(23) (23) Alternative monitoring methods. If an owner or operator wishes to use an alternative monitoring method to demonstrate compliance with any emission standard in this subchapter, other than those alternative monitoring methods which may be authorized pursuant to subs. (10) (e) and (22), the owner or operator may submit an application to the department. Any application shall be processed according to the criteria and procedures in pars. (a) to (f).

NR 463.15(23)(a) (a) The department may not approve averaging periods other than those specified in this section.

NR 463.15(23)(b) (b) The owner or operator shall continue to use the original monitoring requirement until necessary data are submitted and approval is received to use another monitoring procedure.

NR 463.15(23)(c) (c) The owner or operator shall submit the application for approval of alternate monitoring methods no later than the notification of the performance test. The application shall contain all the information specified in subds. 1. to 3.:

NR 463.15(23)(c)1. 1. Data or information justifying the request, such as the technical or economic infeasibility, or the impracticality of using the required approach.

NR 463.15(23)(c)2. 2. A description of the proposed alternative monitoring requirements, including the operating parameters to be monitored, the monitoring approach and technique, and how the limit is to be calculated.

NR 463.15(23)(c)3. 3. Data and information documenting that the alternative monitoring requirements would provide equivalent or better assurance of compliance with the relevant emission standards.

NR 463.15(23)(d) (d) The department may not approve an alternate monitoring application unless it would provide equivalent or better assurance of compliance with the relevant emission standards. Before disapproving any alternate monitoring application, the department shall provide both of the following:

NR 463.15(23)(d)1. 1. Notice of the information and findings upon which the intended disapproval is based.

NR 463.15(23)(d)2. 2. Notice of opportunity for the owner or operator to present additional supporting information before final action is taken on the application. This notice shall specify how much additional time is allowed for the owner or operator to provide additional supporting information.

NR 463.15(23)(e) (e) The owner or operator is responsible for submitting any supporting information in a timely manner to enable the department to consider the application prior to the performance test. Neither submittal of an application nor the department’s failure to approve or disapprove the application relieves the owner or operator of the responsibility to comply with any provisions of this subchapter.

NR 463.15(23)(f) (f) The department may decide at any time, on a case-by-case basis, that additional or alternative operating limits, or alternative approaches to establishing operating limits, are necessary to demonstrate compliance with the emission standards of this subchapter.

NR 463.15 History History: CR 04-023: cr. Register December 2008 No. 636, eff. 1-1-09; corrections in (11) (b), (14) (b) and (18) (b) made under s. 13.92 (4) (b) 7., Stats., Register December 2008 No. 636.

NR 463.16 NR 463.16 Performance test and compliance demonstration general requirements.

NR 463.16(1) (1) Site-specific test plan. Prior to conducting any performance test required by this subchapter, the owner or operator shall prepare a site-specific test plan which satisfies all of the requirements of this section, and shall obtain review and evaluation of the plan by the department pursuant to the procedures in s. NR 460.06.

NR 463.16(2) (2) initial performance test.

NR 463.16(2)(a) (a) Following the review and evaluation of the site-specific test plan, the owner or operator shall demonstrate initial compliance with each applicable emission, equipment, work practice or operational standard for each affected source and emission unit, and report the results in the notification of compliance status report as described in s. NR 463.17 (2). The owner or operator of any existing affected source for which an initial performance test is required to demonstrate compliance shall conduct this initial performance test no later than the date for compliance established by s. NR 463.115 (1). The owner or operator of any new affected source for which an initial performance test is required shall conduct this initial performance test within 90 days after the date for compliance established by s. NR 463.115 (2). Except for the date by which the performance test shall be conducted, the owner or operator shall conduct each performance test in accordance with the requirements and procedures in s. NR 460.06 (2). Owners or operators of affected sources located at facilities which are area sources are subject only to those performance testing requirements pertaining to D&F. Owners or operators of sweat furnaces meeting the specifications of s. NR 463.13 (6) are not required to conduct a performance test.

NR 463.16(2)(b) (b) The owner or operator shall conduct each test while the affected source or emission unit is operating at the highest production level with charge materials representative of the range of materials processed by the unit and, if applicable, at the highest reactive fluxing rate.

NR 463.16(2)(c) (c) Each performance test for a continuous process shall consist of 3 separate runs; pollutant sampling for each run shall be conducted for the time period specified in the applicable method or, in the absence of a specific time period in the test method, for a minimum of 3 hours.

NR 463.16(2)(d) (d) Each performance test for a batch process shall consist of 3 separate runs; pollutant sampling for each run shall be conducted over the entire process operating cycle.

NR 463.16(2)(e) (e) Where multiple affected sources or emission units are exhausted through a common stack, pollutant sampling for each run shall be conducted over a period of time during which all affected sources or emission units complete at least one entire process operating cycle or for 24 hours, whichever is shorter.

NR 463.16(2)(f) (f) Initial compliance with an applicable emission limit or standard is demonstrated if the average of 3 runs conducted during the performance test is less than or equal to the applicable emission limit or standard.

NR 463.16(3) (3) Test methods. The owner or operator shall use the following methods in Appendix A to 40 CFR part 60, incorporated by reference in s. NR 484.04 (13), to determine compliance with the applicable emission limits or standards: