(a) If you use a control system to meet the emission limitations, you must conduct each performance test in Table 5 to this subpart that applies to you.

(b) Each performance test must be conducted according to the requirements in § 63.7(e)(1) and under the specific conditions specified in Table 5 to this subpart.

(c) Before January 21, 2021, you may not conduct performance tests during periods startup, shutdown, or malfunction, as specified in § 63.7(e)(1). After January 20, 2021, performance tests shall be conducted under such conditions as the Administrator specifies to the owner or operator based on representative performance of the affected source for the period being tested. Representative conditions exclude periods of startup and shutdown unless specified by the Administrator or an applicable subpart. The owner or operator may not conduct performance tests during periods of malfunction. The owner or operator must record the process information that is necessary to document operating conditions during the test and include in such record an explanation to support that such conditions represent normal operation. Upon request, the owner or operator shall make available to the Administrator such records as may be necessary to determine the conditions of performance tests.

(d) Before January 21, 2021, You must conduct three separate test runs for each performance test required in this section, as specified in § 63.7(e)(1) unless otherwise specified in the test method. Each test run must last at least 1 hour. After January 20, 2021, you must conduct three separate test runs for each performance test required in this section, as specified in § 63.5993(c) above, unless otherwise specified in the test method. Each test run must last at least 1 hour.

(e) If you are complying with the emission limitations using a control system, you must also conduct performance tests according to the requirements in paragraphs (e)(1) through (3) of this section as they apply to you.

(1) Determining capture efficiency of permanent or temporary total enclosure. Determine the capture efficiency of a capture system by using one of the procedures in Table 5 to this subpart.

(2) Determining capture efficiency of an alternative method. As an alternative to constructing a permanent or temporary total enclosure, you may determine the capture efficiency using any capture efficiency protocol and test methods if the data satisfy the criteria of either the Data Quality Objective or the Lower Confidence Limit approach in appendix A to subpart KK of this part.

(3) Determining efficiency of an add-on control device. Use Table 5 to this subpart to select the test methods for determining the efficiency of an add-on control device.