5 Colo. Code Regs. § 1001-4-IV

Current through Register Vol. 47, No. 24, December 25, 2024

Section 5 CCR 1001-4-IV - Technology Requirements for Process Wastewater Vessels and Impoundments

IV.A. Anaerobic Process Wastewater Vessels and Impoundments

IV.A.1. New or Expanded

All new or expanded anaerobic process wastewater vessels and impoundments, including, but not limited to, waste treatment or storage impoundments, constructed or under construction for use in connection with a housed commercial swine feeding operation, shall employ an approved cover or be operated with technologies or practices that are as effective as covers at minimizing odor from the operation, to capture, recover, incinerate, or otherwise manage odorous gases to minimize, to the greatest extent practicable, the emission of such gases into the atmosphere. The housed commercial swine feeding operation shall submit to the Division information sufficient to demonstrate that the technologies and practices used are as effective as covers at minimizing odor from the operation. Requirements concerning the use and maintenance of the technologies or practices employed shall be included in the permit to operate and odor management plan for the housed commercial swine feeding operation. All new anaerobic process wastewater vessels and impoundments shall meet the setback requirements of Section V., Part B, of this Regulation Number 2.

IV.A.2. Existing

All existing anaerobic process wastewater vessels and impoundments, including, but not limited to, aeration tanks and waste treatment or storage impoundments, owned or operated for use in connection with a housed commercial swine feeding operation, shall employ a cover or be operated with technologies or practices that are as effective as covers at minimizing odor from the operation as provided in Sections IV.A.3.a. through IV.A.3.d., Part B, of this Regulation Number 2 so as to capture, recover, incinerate, or otherwise manage odorous gases to minimize, to the greatest extent practicable, the emission of such gases into the atmosphere. The housed commercial swine feeding operation shall submit to the Division information sufficient to demonstrate that the technologies and practices used are as effective as covers at minimizing odor from the operation. Requirements concerning the use and maintenance of the technologies or practices employed shall be included in the permit to operate for the housed commercial swine feeding operation.

IV.A.3. All Anaerobic process Wastewater Vessels and Impoundments

IV.A.3.a. The anaerobic treatment process wastewater vessel or impoundment shall employ an approved cover or be operated with technologies or practices that are as effective as covers at minimizing odor from the operation so as to capture, recover, incinerate, or otherwise manage odorous gases to minimize, to the greatest extent practicable, the emission of such gases into the atmosphere.

IV.A.3.b. Approved covers must constitute a continuous, physical barrier between the anaerobic process wastewater and the ambient air that completely covers the anaerobic process. The cover must have no uncontrolled vents. Odor emissions from the anaerobic process wastewater vessel or impoundment may not be vented to the atmosphere. Rather, vents must be connected to equipment designed to capture, control, combust and/or treat the odorous emissions.

IV.A.3.c. Approved covers include, but are not limited to, the following:

IV.A.3.c.(1) Rigid covers, such as geodesic domes or other structures, which constitute a building roof or hard cap over the anaerobic process wastewater vessel or impoundment.

IV.A.3.c.(2) Synthetic covers made of reinforced polypropylene, high-density polyethylene, or other synthetic material, including geosynthetic membranes and geomembrane covers. Synthetic covers can be supported by cables or other structures above the stored liquid, or can float on, or be inflated above, the waste liquids surface. The cover must have a minimum thickness of 40 mils.

IV.A.3.c.(3) Any other cover approved by the Division with comparable effectiveness to the above approved covers to capture, recover, incinerate, or otherwise manage odorous gases to minimize, to the greatest extent practicable, the emission of such gases into the atmosphere. The owner or operator of a housed commercial swine feeding operation shall include in an application for a permit to operate credible evidence of the effectiveness of such device, technology, or material. In addition, the owner or operator must demonstrate the continuous effectiveness of such alternative cover within180 days of the Division's issuance of the permit to operate. The owner or operator shall make such a demonstration through monitoring or as otherwise provided in the permit to operate. The Division may condition final approval of such cover upon such additional demonstrations as may be necessary to prove that such cover will minimize or manage, to the greatest extent practicable, emissions of odorous gases throughout the year. If the owner or operator fails to make such demonstration of effectiveness, the owner or operator shall promptly submit to the Division, for incorporation into the permit to operate, a compliance schedule for the installation and operation of an approved cover as soon as possible but no later than 180 days of the Division's determination of ineffectiveness.

IV.A.3.d. The owner or operator of a housed commercial swine feeding operation that employs technologies or practices associated with an anaerobic process wastewater vessel or impoundment must submit to the Division information sufficient to demonstrate that such technologies or practices are as effective as covers at minimizing odor from the operation.

IV.A.3.d.(1) The owner or operator shall include such information in an application for a permit to operate including olfactometry, scentometry or other test methods that have been reviewed and approved by the Division to demonstrate the effectiveness of technologies or practices in minimizing odor compared to Division-approved covers.

IV.A.3.d.(2) The owner or operator must demonstrate the continuous effectiveness of such technologies or practices within 180 days of the Division's issuance of the permit to operate. The owner or operator shall make such a demonstration through monitoring or other test methods as otherwise provided in the permit to operate. The Division may condition final approval of such technologies or practices upon such additional demonstrations as may be necessary to prove that such technologies or practices will minimize or manage, to the greatest extent practicable, emissions of odorous gases throughout the year. If the owner or operator fails to make such demonstrations of effectiveness, the owner or operator shall promptly submit to the Division, for incorporation into the permit to operate, a compliance schedule for the installation and operation of an approved cover, or other technology or practice approved by the Division as soon as possible but no later than 180 days of the Division's determination of ineffectiveness.

IV.A.3.e. An owner or operator may install a covered anaerobic treatment digester

(including covered sequencing batch reactors) that treats the manure or process wastewater resulting from operations of the housed commercial swine feeding operation. Any associated process wastewater vessels and waste impoundments must be maintained as aerobic or the cover requirement of Section IV.A., Part B, of this Regulation Number 2 shall apply.

IV.A.3.f. Reserved.

IV.A.3.g. The owner or operator of a housed commercial swine feeding operation may choose among several approved alternatives for managing the odorous gases produced from the covered anaerobic process wastewater vessel or impoundment, so long as the alternative is designed, operated, and maintained to minimize, to the greatest extent practicable, the emission of such gases into the atmosphere. Approved technologies are as follows:

IV.A.3.g.(1) Incineration. Vented gases may be collected and incinerated through the use of a flare, incinerator, or other device designed to burn waste gases.

IV.A.3.g.(2) Combustion, as part of an energy recovery operation. Gases may be collected and combusted to operate a gas turbine, engine generator set, boiler, or heater, to produce usable energy.

IV.A.3.g.(3) Add-on Control Equipment. Vented gases may be treated by the use of biofilters or wet scrubbers designed to remove odor emissions, including hydrogen sulfide, particulate matter, and ammonia gases, to the greatest extent practicable.

IV.A.3.g.(4) Any other device, technology, or process approved by the Division as comparably effective as the technologies listed in Section IV.A.3.g.(1) through IV.A.3.g.(3).

IV.B. Aerobic Impoundments

IV.B.1. New

Owners and operators of new aerobic impoundments shall employ technologies to ensure maintenance of aerobic conditions or otherwise to minimize the emission of odorous gases to the greatest extent practicable. Requirements concerning the use and maintenance of the technologies employed shall be included in the permit to operate and odor management plan for the housed commercial swine feeding operation. All new aerobic impoundments shall meet the setback requirements of Section V., Part B, of this Regulation Number 2.

IV.B.2. Existing

All existing aerobic impoundments shall install and have operational technologies to ensure maintenance of aerobic conditions or otherwise to minimize the emission of odorous gases to the greatest extent practicable. Requirements concerning the use and maintenance of the technologies employed shall be included in the permit to operate and odor management plan for the housed commercial swine feeding operation.

5 CCR 1001-4-IV