The revisions to Regulation Number 7 were finalized with an effective date of December 30, 2017. The division released a fact sheet with pertinent information on these revisions, which can be found on Colorado's DPHE Environmental Records website .

A summary of actions and key dates per these revisions are given below:

SourceKey ActionCompliance Start Date
Natural Gas Processing Plants in the Ozone Non-Attainment Area (NAA)Compliance with OOOOa LDARJanuary 1, 2019
Centrifugal Compressors located between the wellhead and the natural gas transmission and storage segment (excluding well production) in the NAAWet seal fluid degassing systems on wet seal centrifugal compressors must be reduced by at least 95%

Annual visual and Method 21 inspections of the cover and closed vent system; monthly visible emission inspections of the combustion device
January 1, 2018
Reciprocating Compressors located between the wellhead and the natural gas transmission and storage segment (excluding well production) in the NAAReplace rod packing every 26,000 hours of operation or every 36 months, or route emissions to a process

Annual visual and Method 21 inspections of the cover and closed vent system
January 1, 2018
Natural gas-driven diaphragm pneumatic pumps in the NAAPneumatic pumps at a natural gas plant → Zero VOC

Pneumatic pumps at a well production facility → Reduce emissions by 95% when technically feasible
May 1, 2018
Leak Detection requirements in the NAA for compressor stations and well production facilitiesInspect natural gas compressor stations quarterly; Inspect well production facilities annually or semi-annually depending on actual uncontrolled VOC emissions

First Attempt to Repair → Within 5 days of leak
Complete Repair → Within 30 days of leak
Remonitor → Within 15 days after repair
June 30, 2018
Continuous bleed natural gas-driven pneumatic controller (PC) in the NAAPC upstream of natural gas processing plant: Low-bleed requirement

PC located at the natural gas processing plant: Zero bleed rate
PCs at gas plants: If placed in service prior to January 1, 2018, must replace or retrofit by May 1, 2018
Pneumatic Controller inspection and enhanced response in the NAAInspect PC using an approved instrument monitoring method at well production facilities and natural gas compressor stations; Frequency of inspection depends on actual uncontrolled VOC emissions

If detectable emissions are observed, conduct enhanced response within 5 days and return PC to normal operation within 30 days; Conduct verification within 15 days of enhanced operation
June 30, 2018