2018-08-03_PERMIT FILE - C1981019A (2)

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Whenever new control equipment is installed, or whenever a different type of control equipment replaces an existing type of control equipment; or d. Whenever a permit limitation must be modified; or e. No later than 30 days before the existing APEN expires. 23. Public access must be precluded in all areas within the modeling receptor exclusion zone as submitted with the modeling in the application. The exclusion zone must be fenced and posted with no trespassing signs. See Attachment C for boundaries of the exclusion zone. (Reference: Regulation Number 3, Part B, III.6.5) 24. The owner or operator must develop and submit a Nitrogen Dioxide (NO2) monitoring program for approval by the Division within sixty days (60) after issuance of this permit. Monitoring ambient concentrations and source impacts for NO2 must be conducted by installing one monitor as per the monitoring program approved by the Division. The monitoring program must address the type of instrumentation to be installed, the location of the monitor, and data QA/QC requirements (see 40 CFR 58 App. B), and provide for installation of the monitoring station within one hundred and eighty (180) days of the Division's approval of the monitoring program. Results of such monitoring must be reported to the Division on a quarterly basis within thirty (30) days of the end of the quarter. The owner or operator must include a provision in the OEtM Plan for periodic review and comparison of the results of such monitoring, results of on-site meteorological observations and operations at the facility Should the monitor record six (6) daily maximum one hour average values in a calendar year in excess of 100 ppb of NO2, within 60 days of the date of the sixth such hourly average reading in excess of 100 ppb, the owner or operator must submit a plan to the Division to address the potential cause of such readings and propose implementation of a measure or measures designed to address the issue. A monitored exceedance is not a violation of the permit or applicable regulations. Upon satisfactory demonstration of compliance with the one hour NO2 National Ambient Air Quality Standard (NO2 standard) per 40 CFR 50.11(f) based on three (3) years of monitoring data during representative operations, monitoring is no longer required and the monitor may be removed. Notwithstanding any of the above, at any time the permittee may approach the Division for withdrawal of this monitoring requirement. (Reference: Regulation Number 3. Part A, VIII.B.) A request for withdrawal of this monitoring requirement may be based on a showing that addresses factors such as, but not limited to the following: the levels of monitored NO2 readings, the nature of meteorological conditions, and levels of operations at the facility compared to operating levels authorized in the permit. A request for withdrawal of this monitoring requirement may also be based on a modeling demonstration that predicts compliance with the NO2 Standard. GENERAL TERMS AND CONDITIONS: 25. This permit and any attachments must be retained and made available for inspection upon request. The permit may be reissued to a new owner by the Division as provided in Regulation Number 3, Part B, ILB upon a request for transfer of ownership and the submittal of a revised APEN and the required fee. &®COLORADO Air Pollution Control Division Page 10 of 17