Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 420 - Control Of Organic Compound Emissions From Petroleum And Gasoline Sources
Section NR 420.05 - Petroleum refinery sources

Universal Citation: WI Admin Code ยง NR 420.05

Current through August 26, 2024

(1) VACUUM PRODUCING SYSTEMS.

(a) Applicability. This subsection applies, subject to the provisions of s. NR 425.03, to vacuum producing systems at petroleum refining sources.

(b) Requirements.The owner or operator of any vacuum producing systems at a petroleum refinery may not permit the emission of any noncondensible VOC, from the condensers or accumulators of the system. The control required by this paragraph shall be achieved by one of the following:
1. Piping the noncondensible vapors to an operating firebox or incinerator.

2. Compressing the vapors and adding them to the refinery fuel gas.

(2) WASTEWATER SEPARATORS.

(a) Applicability. This subsection applies, subject to the provisions of s. NR 425.03, to wastewater separators at petroleum refining sources.

(b) Requirements. The owner or operator of any wastewater (oil-water) separators at petroleum refinery shall do both of the following:
1. Provide covers and seals approved by the department on all separators and forebays.

2. Equip all openings in covers, separators, and forebays with lids or seals such that the lids or seals are in the closed position at all times except when in actual use.

(3) PROCESS UNIT TURNAROUNDS.

(a) Applicability. This subsection applies to process unit turnarounds at petroleum refining sources.

(b) Requirements. The owner or operator of a petroleum refinery shall develop and submit to the department for approval a detailed procedure for minimizing VOC emissions during process unit turnaround. At a minimum, the procedure shall provide for all of the following:
1. Depressurization venting of the process unit or vessel to a flare, firebox or vapor recovery system which prevents release to the ambient air of at least 90% by weight of the VOCs vented.

2. No emission of VOCs from a process unit or vessel until its internal pressure is 136 kPa (19.7 psia) or less.

3. Recordkeeping of the following items during the ozone season:
a. Every date that each process unit or vessel is shut down.

b. The approximate total quantity of VOCs emitted and the duration of the emission.

(4) FUGITIVE EMISSION SOURCES.

(a) Applicability. This subsection applies to specific fugitive emissions sources at petroleum refineries.

(b) Valve requirements. The owner or operator of a petroleum refinery may not:
1. Install a valve at the end of a pipe or line containing VOCs unless one of the following applies:
a. The pipe or line is sealed with a second valve, a blind flange, a plug, or a cap.

b. The valve is a safety pressure relief valve.

2. Operate a pipeline valve or pressure relief valve in gaseous service unless it is visibly marked.

(c) Monitoring. The owner or operator of a petroleum refinery shall:
1. Develop and submit to the department for approval a monitoring schedule for fugitive emission sources. At a minimum, the schedule shall provide for:
a. Yearly monitoring of all pump seals, pipeline valves in liquid service, and process drains.

b. Quarterly monitoring of all compressor seals, pipeline valves in gaseous service, and pressure relief valves in gaseous service.

c. Routine visual inspection of all pump seals on a weekly basis.

2. Provide for the following actions to be performed immediately under the following circumstances:
a. Monitoring of any pump seals from which liquids are observed dripping.

b. Monitoring, subsequent to repair, of any component that had been found leaking.

c. Visual inspection of the seating of any pressure relief valve after it has vented to the atmosphere.

3. Be exempt from the monitoring requirements of subds. 1. and 2. for:
a. A pressure relief device connected to an operating flare header, or vapor recovery device.

b. Inaccessible valves.

c. Storage tank valves.

d. Valves not externally regulated.

4. Upon detection of a leaking component which is producing a VOC concentration in excess of 10,000 ppm at any point accessible to the monitoring device, do all of the following:
a. Affix a weatherproof and readily visible tag bearing an identification number and the date the leak is detected to the leaking component.

b. Include the leaking component on a written list of scheduled repairs within 24 hours.

c. Repair and retest the component within 15 days when this is possible without shutting down operations.

d. Identify all leaking components which cannot be repaired until the unit is shut down for turnaround.

(d) Reporting. Beginning January 15, 1982, the owner or operator of a petroleum refinery shall submit quarterly reports to the department containing the following:
1. A statement attesting to performance of the monitoring program as approved under par. (c) 1.

2. The number of each type of components inspected and the total number of components found leaking.

3. Lists of all leaking components awaiting unit turnaround.

4. Lists of any additional leaking components detected but not repaired within 15 days.

5. Status of repair operations of leaking components.

(e) Recordkeeping. The owner or operator of a petroleum refinery shall maintain a leaking component monitoring log, for a period of 3 years from the recording date, containing at a minimum all of the following:
1. The name of the process unit where the component is located.

2. The type of component (e.g., valve, seal).

3. The composition of the stream on which the component is located.

4. The tag number of the component.

5. The date on which a leaking component is discovered.

6. The date on which a leaking component is repaired.

7. The date and instrument reading of the recheck procedure after a leaking component is repaired.

8. A record of the calibration of the monitoring instrument.

9. A list of leaks that cannot be repaired until turnaround.

10. The total number of components checked in the last quarter and the total number of components found leaking.

Disclaimer: These regulations may not be the most recent version. Wisconsin may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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