§ 60.6535 May I conduct stack testing less often?
(a) For annual performance stack tests for dioxins/furans, you may conduct annual stack tests on an alternate performance testing schedule for the purposes of evaluating system performance to establish new operating parameter levels, testing new technology or control technologies, diagnostic testing, or related activities for the purpose of improving facility performance or advancing the state-of-the-art for controlling facility emissions. You may test one unit for dioxins/furans and apply the dioxins/furans operating parameters to similarly designed and equipped units on site if you meet the following conditions. First, you have multiple municipal waste combustors onsite that are subject to this subpart. Second, all those municipal waste combustors have demonstrated levels of dioxins/furans emissions less than or equal to 7 nanograms per dry standard cubic meter (total mass) for 2 consecutive years. In that case, you may choose to conduct annual stack tests on only one municipal waste combustor per year at your plant. The provision only applies to performance testing for dioxins/furans emissions. You must meet the requirements in paragraphs (b) through (e) of this section.
(b) At a minimum, you must conduct a performance test for dioxins/furans emissions for one municipal waste combustor on an annual basis (no less than 9 calendar months and no more than 15 months following the previous performance test), and you must complete five performance tests in each 5-year calendar period. Each year a different municipal waste combustor must be tested, and the municipal waste combustor must be tested in sequence (e.g., unit 1, unit 2, unit 3, as applicable).
(1) If each annual performance test continues to indicate a dioxins/furans emission level less than or equal to 7 nanograms per dry standard cubic meter (total mass), you may continue to conduct a performance test on only one municipal waste combustor per year.
(2) If any annual performance test indicates a dioxins/furans emission level greater than 3.6 nanograms per dry standard cubic meter (total mass), you must conduct all subsequent annual performance tests on all municipal waste combustor. You must continue to conduct performance tests on all units annually until you can demonstrate dioxins/furans emission level less than or equal to 7 nanograms per dry standard cubic meter (total mass) through performance tests for all units subject to this subpart for 2 consecutive years.
(c) Upon meeting the requirements in paragraph (b) of this section for one affected facility, you may elect to apply the average carbon mass feed rate and associated carbon injection system operating parameter levels for dioxins/furans as established in § 60.6560 to similarly designed and equipped units on site.
(d) Upon testing each subsequent unit in accordance with the testing schedule established in paragraph (b) of this section, the dioxins/furans and mercury emissions of the subsequent unit must not exceed the dioxins/furans and mercury emissions measured in the most recent test of that unit prior to the revised operating parameter levels.
(e) If you follow the performance testing schedule specified in paragraph (b) of this section and apply the carbon injection system operating parameters to similarly designed and equipped units on site, you must follow the procedures specified in § 60.6630(j) for reporting, including the procedures specified in § 60.6630(i) for reporting the selection of this schedule.