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WFN12

Air Quality MonitoringChemical Additive Disclosures

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Trip 1

Proposed Additives

WFN12 Proposed Hydraulic Fracturing Fluid Additives

Actual Additives

WFN12 Drilling Fluid AdditivesWFN12 Hydraulic Fracturing Fluid Additives

Trip 2

Proposed Additives

WFN12 Trip 2 Proposed Drilling Fluid Additives
WFN12 Trip 2 Proposed Hydraulic Fracturing Fluid Additives

Actual Additives

WFN12 Trip 2 Drilling Fluid Additives

WDTN18

Air Quality MonitoringChemical Additive DisclosuresAir Monitoring Historical

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Trip 1

Proposed Additives

WDTN18 Proposed Hydraulic Fracturing Fluid Additives

Actual Additives

WDTN18 Drilling Fluid AdditivesWDTN18 Hydraulic Fracturing Fluid Additives

Trip 2

Proposed Additives

WDTN18 Trip 2 Proposed Drilling Fluid Additives

Actual Additives



WDTN5

Air Quality MonitoringChemical Additive Disclosures

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Proposed Additives

 WDTN5 Proposed Hydraulic Fracturing Fluid Additives

Actual Additives

WDTN5 Drilling Fluid AdditivesWDTN5 Hydraulic Fracturing Fluid Additives

Shirley Station

Air Quality Monitoring

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the station.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the station and the others would be in the path of wind traveling across the station (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Due to the lack of a West Virginia Department of Environmental Protection (DEP) ambient air monitoring station within close proximity to the Shirley Station site, no regional background data are available for direct comparison to the site-specific results. This limitation may affect the ability to contextualize site-specific measurements against regional baseline conditions. Users are encouraged to consider this when reviewing the monitoring data presented.

Under Maintenance
CNX has initiated air quality monitoring around our facilities to provide relatable data, which helps our communities and regulatory agencies understand the true impacts of natural gas development and production.

RHL37

Air Quality MonitoringChemical Additive Disclosures

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Proposed Additives

Drilled and/or completed prior to Radical Transparency launch in November of 2023. No data available.

Actual Additives

RHL37 Drilling Fluid Additives RHL37 Hydraulic Fracturing Fluid Additives

NV113 is a well pad located in Morris Township, Washington County, PA comprising six (6) Marcellus wells. CNX completed drilling in June of 2024, with hydraulic fracturing slated later in 2024

NV113

Air Quality MonitoringChemical Additive Disclosures

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Proposed Additives

NV113 Proposed Drilling Fluid Additives NV113 Proposed Hydraulic Fracturing Fluid Additives

Actual Additives

NV113 Drilling Fluid AdditivesNV113 Hydralic Fracturing Fluid Additives

NV110 is a well pad located in East Finley Township, Washington, PA comprising seven Marcellus wells. The wells were drilled and completed in 2023.

NV110

Air Quality MonitoringChemical Additive Disclosures

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Proposed Additives

Drilled and/or completed prior to Radical Transparency launch in November of 2023. No data available.

Actual Additives

NV110 Drilling Fluid AdditivesNV110 Hydraulic Fracturing Fluid Additives

Morris Compressor Station is located in Richhill Township, Greene County, PA. Natural gas from off-site wells is brought in via pipeline to be compressed and dried prior to being piped off site.

Morris Station

Air Quality Monitoring

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the station.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the station and the other would be in the path of wind traveling across the station (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

MOR9 is archived under the Radical Transparency program. The program includes monitoring of well pads in the construction, drilling, and completions phases of development through approximately 6 months of production. MOR9 is a well pad located in Morris Township, Greene County, PA comprised of five (5) Marcellus shale and two (2) Burkett shale wells. Four (4) additional Marcellus wells were drilled on the existing pad in November and December 2023 and were completed in 2024. MOR9 is situated adjacent to other and/or in the midst of a third-party high traffic coal surface facility. This third-party industrial activity is permitted separately by PA DEP and unrelated to CNX’s activity. These nearby industrial and coal mining support operations and characteristics may affect the air quality readings observed at MOR9.

MOR9

Air Quality MonitoringChemical Additive Disclosures

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Proposed Additives

MOR9 Proposed Drilling Fluid AdditivesMOR9 Proposed Hydraulic Fracturing Fluid Additives

Actual Additives

MOR9 Drilling Fluid AdditivesMOR9 Hydraulic Fracturing Fluid Additives

Mamont Station is located in Washington Township, Westmoreland County, PA. Natural gas from off-site wells is brought in via pipeline to be compressed and dried prior to being piped off site. The site is comprised of four (4) natural gas fired reciprocating compressor engines, two (2) dehydration units, and supporting process equipment and emission control devices including tanks, emergency generator, emergency vent stack, truck loadout appurtenances, and associated pipeline pigging chambers.

Mamont Station

Air Quality Monitoring

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the station.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the station and the other would be in the path of wind traveling across the station (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

MAM16 is a well pad located in Bell Township, Westmoreland County, PA. This pad is comprised of three (3) Utica wells and five (5) Marcellus wells.

MAM16

Air Quality MonitoringChemical Additive Disclosures

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Trip 1

Proposed Additives

MAM16 Proposed Hydraulic Fracturing Fluid Additives

Actual Additives

MAM16 Drilling Fluid AdditivesMAM16 Hydraulic Fracturing Fluid Additives

Trip 2

Proposed Additives

MAM16 Trip 2 Proposed Drilling Fluid AdditivesMAM16 Trip 2 Proposed Hydraulic Fluid Additives

Actual Additives

MAM16 Trip 2 Drilling Fluid AdditivesMAM16 Trip 2 Hydraulic Fracturing Fluid Additives

Trip 3

Proposed Additives

MAM16 Trip 3 Proposed Drilling Fluid Additives

Actual Additives

MAM15 is a well pad located in Bell Township, Westmoreland County, PA. This pad is comprised of three (3) Utica wells. Drilling began in February 2024, and the top hole (vertical) section was completed in March 2024. The horizontal section is being drilled.

MAM15

Air Quality MonitoringChemical Additive Disclosures

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Proposed Additives

MAM15 Proposed Drilling Fluid AdditivesMAM15 Proposed Hydraulic Fracturing Fluid Additives

Actual Additives

MAM15 Drilling Fluid AdditivesMAM15 Hydraulic Fracturing Fluid Additives

MAM14

Air Quality MonitoringChemical Additive DisclosuresWater Protection Monitoring

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Proposed Additives

MAM14 Proposed Drilling Fluid AdditivesMAM14 Proposed Hydraulic Fracturing Fluid Additives

Actual Additives

MAM14 Drilling Fluid Additives

Majorsville Compressor Station

Majorsville Compressor Station

Air Quality Monitoring

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the station.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the station and the others would be in the path of wind traveling across the station (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

MAJ8

Air Quality MonitoringChemical Additive DisclosuresWater Protection Monitoring

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Proposed Additives

MAJ8 Proposed Drilling Fluid Additives


Herminie

Air Quality MonitoringChemical Additive Disclosures

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Proposed Additives

Drilled or completed by APEX Energy Co.

Actual Additives

Drilled or completed by APEX Energy Co.

Dry Ridge Compressor Station is located in Webster District, Marshall County, WV. Natural gas from off-site wells is brought in via pipeline to be compressed and dehydrated prior to being piped off site. The site is comprised of three (3) natural gas-fired reciprocating compressor engines, one (1) dehydration unit, and supporting process equipment and emission control devices including tanks, emergency generator, emergency flare stack, truck loadout appurtenances, and associated pipeline pigging chambers. The station also has a compressed natural gas (CNG) filling station in which dehydrated gas is further compressed to CNG pressures to be used as a clean burning fuel for some CNX vehicles noncommercially

Dry Ridge Compressor Station

Air Quality Monitoring

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the station.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the station and the other would be in the path of wind traveling across the station (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Buckland Compressor Station is located in Richhill Township, Greene County, PA. Natural gas from off-site wells is brought in via pipeline to be compressed and dried prior to being piped off site. The site is comprised of eight (8) natural gas fired reciprocating compressor engines, three (3) dehydration units, and supporting process equipment and emission control devices including tanks, vapor destruction units, flares, an emergency generator, truck loadout appurtenances, and associated pipeline pigging chambers. Electricity is supplied to the site by five (5) natural gas fired microturbines.

Buckland Compressor Station

Air Quality Monitoring

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the station.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the station and the other would be in the path of wind traveling across the station (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

BP6 is a well pad located in Bell Township, Westmoreland County, PA, comprising 3 producing Marcellus wells, and 1 producing Utica well. In December 2023, CNX completed the drilling of 2 additional Utica wells and 3 Marcellus wells. Hydraulic fracturing was completed in June of 2024. Wells are currently in production. BP6 is archived under the Radical Transparency program. The program includes monitoring of well pads in the construction, drilling, and completions phases of development through approximately 6 months of production.

BP6

Air Quality MonitoringChemical Additive Disclosures

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Under Maintenance

Proposed Additives

BP6 Proposed Hydraulic Fracturing Fluid Additives

Actual Additives

BP6 Drilling Fluid AdditivesBP6 Hydraulic Fracturing Fluid Additives

Aerial view of a acaa4 location or site, showcasing a wide perspective

ACAA4

Air Quality MonitoringChemical Additive DisclosuresAir Monitoring Historical

Air Quality Monitoring

Upwind and downwind air quality monitoring equipment measuring PM2.5 (particulate matter) and VOCs known as BTEX was installed within 500’ of the well pad.

The prevailing wind direction for this region is from the southwest. CNX positioned the PM2.5 monitors such that one would be subject to winds from upwind of the well pad and the other would be in the path of wind traveling across the well pad (downwind).

Follow this link to see more information on CNX methane emission monitoring and mitigation efforts.

Due to the pre-existing monitoring configuration and constraints of the property (airport security restrictions) near the ACAA 4 Well Pad, standard spacing considerations for the placement of BAM monitors—ideally sited at a minimum distance of 500 feet—were not achievable. As a result, the location of the monitor placed in the prevailing upwind location may influence data interpretation due to its proximity to development activities, and users should consider this constraint when evaluating the measurements presented.

Under Maintenance

Trip 1

Proposed Additives

Drilled and/or completed prior to Radical Transparency launch in November of 2023. No data available.

Actual Additives

ACAA4 Drilling Fluid AdditivesACAA4 Hydraulic Fracturing Fluid Additives

Trip 2

Proposed Additives

ACAA4 Trip 2 Proposed Drilling Fluid Additives

Actual Additives