Air Permit No. 08907R03

10. LIMITATION TO AVOID 15A NCAC 2Q .0501 - Pursuant to 15A NCAC 2Q .0315 "Synthetic Minor Facilities," to avoid the applicability of 15A NCAC 2Q .0501 "Purpose of Section and Requirement for a Permit," as requested by the Permittee, the facility-wide emissions of sulfur dioxide (SO2) shall be less than 100 tons per consecutive 12-month period, AND the facility-wide individual hazardous air pollutant (HAP) emissions shall be less than 10 tons per consecutive 12-month period, AND the facility-wide total HAP emissions shall be less than 25 tons per consecutive 12-month period.

a. SO2 REQUIREMENTS - The PSD avoidance recordkeeping and reporting requirements listed below for condition no. 11.a. and 11.b. shall satisfy the synthetic minor recordkeeping and reporting requirements for sulfur dioxide.

b. THERMAL OXIDIZER REQUIREMENTS FOR HAZARDOUS AIR POLLUTANTS Hazardous air pollutant emissions shall be controlled by operating a thermal oxidizer (ID No. CD-TO) as described in the permit equipment list to ensure that facility-wide HAP emissions are less than 10 tons (for each individual HAP) and 25 tons (for total HAPs) per consecutive 12-month period.

i. Continuous Monitoring Requirements - To ensure the proper performance of the thermal oxidizer the Permittee shall:

A. Install, calibrate, operate, and maintain a temperature monitoring device. The device shall be capable of monitoring temperature with an accuracy of plus or minus one percent of the temperature being monitored in degrees Celsius, or plus or minus one degree Celsius, whichever is greater. The thermocouple or temperature sensor shall be installed in the combustion chamber at a location in the combustion zone.

B. The minimum operating temperature of the combustion zone shall be 1,100 degrees Fahrenheit. A utilization time clock shall be used to track the operation of the thermal oxidizer. For each day, the total hours of operation and average operating temperature shall be determined and recorded along with any corrective actions taken, if any.

ii. Inspection and Maintenance Requirements - To comply with the provisions of this permit and ensure that emissions do not exceed the regulatory limits, the Permittee shall establish an inspection and maintenance (i&M) schedule/checklist for the thermal oxidizer based on the manufacturer's recommendations. As a minimum, the i&M program shall include an annual calibration of all associated instrumentation and an external inspection to ensure structural integrity.

iii. Inspection and Maintenance Recordkeeping Requirements - The results of each inspection and any variance from the manufacturer's recommendations or from those given in this permit (when applicable) shall be investigated with corrections made and dates of actions recorded in a logbook. Records of all maintenance and monitoring activities shall be recorded in the logbook. The logbook (in written or electronic form) shall be kept on-site and made available to DAQ personnel upon request.

iv. Recordkeeping Requirements for Start-up, Shutdown, and/or Malfunction of Thermal Oxidizer Only - In addition to the notification requirements of 2D .0535, when the thermal oxidizer is not operating under optimal conditions as a result of start-up, shutdown, or malfunction, the Permittee shall record the following information, which shall be used in calculating emissions:

A. The date, time, and duration of operation in this mode.

B. The estimated production rate during operation in this mode.

C. Description of problems and resulting corrective actions.

c. REPORTING REQUIREMENTS FOR HAZARDOUS AIR POLLUTANTS ‑ Within 30 days after each calendar year, regardless of the actual emissions, the Permittee shall submit the following to the Regional Supervisor, DAQ, in writing:

i. The monthly individual HAP and monthly total HAP emissions for each of the previous 12 months, and the total individual HAP and total HAP emissions for the calendar year, and a summary of the utilization of the thermal oxidizer during the calendar year.

ii. The Permittee shall keep each monthly record on file for a minimum of three years.