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

ACAA4

ACAA4 is a well pad located near Pittsburgh International Airport in Allegheny County, PA. The ACAA4 well pad is located between the airport’s south runway and Interstate 376. This well pad is comprised of four (4) Marcellus shale wells drilled and hydraulically fractured in 2023. Air monitoring for these wells was conducted between February and August of 2024, when all wells were in the production phase (Trip 1). In September 2025, a second phase of air monitoring began in conjunction with drilling operations for five additional wells (Trip 2).

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.

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