Clean Air Act stationary source · ICIS-AIR PA000726031
MARKWEST LIBERTY BLUESTONE LLC/SARSEN GAS PROC PLT, Evans City, PA: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Minor sourceEmissions classification
- No Violation IdentifiedCurrent violation status, as filed
- 19Compliance evaluations since January 1, 2017
- 0High-priority violations since January 1, 2017
- 3Formal enforcement actions since January 1, 2017
MARKWEST LIBERTY BLUESTONE LLC/SARSEN GAS PROC PLT, at 774 PROSPECT RD, Evans City in Butler County, Pennsylvania, is an operating minor source of air pollution on EPA’s ICIS-AIR register. EPA’s file records its current violation status (ICIS-AIR’s high-priority violation field) as “No Violation Identified”. Butler County is on EPA’s Green Book list of areas that do not meet a national air quality standard. The status and classification are as EPA’s facility file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the source’s current standing, quarter by quarter.
Identity
| Facility as filed | MARKWEST LIBERTY BLUESTONE LLC/SARSEN GAS PROC PLT |
|---|---|
| ICIS-AIR ID | PA000726031 |
| EPA facility registry ID | 110060012418 |
| Operating status | Operating |
| Emissions classification | Minor source |
| Current violation status (ICIS-AIR high-priority violation field) | No Violation Identified |
| Address | 774 PROSPECT RD, Evans City, PA 16033-7830 |
| County | Butler County |
| In a nonattainment county | Yes (EPA Green Book) |
| Industry (NAICS) | Oil and gas extraction (NAICS 2111) |
| SIC code | 1321 |
| EPA region | 03 |
Cited to the EPA ICIS-AIR facility file (ECHO download).
Programs and pollutants
Velarion’s copy of EPA’s ICIS-AIR download does not include its program, pollutant and Title V certification files, so this page does not list the Clean Air Act programs MARKWEST LIBERTY BLUESTONE LLC/SARSEN GAS PROC PLT is under or the pollutants it is permitted for. The programs each evaluation and violation below was recorded under are shown with it. EPA’s free Detailed Facility Report lists both.
Compliance evaluations
- 19Evaluations since January 1, 2017
- 2Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| March 3, 2026 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| April 30, 2025 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| November 6, 2024 | PCE On-Site Monitoring/Sampling | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| May 2, 2024 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| June 26, 2023 | FCE On-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| April 18, 2023 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| June 6, 2022 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| November 23, 2021 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| June 11, 2021 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| March 30, 2021 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| May 21, 2020 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| January 14, 2020 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| May 21, 2019 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| February 7, 2019 | PCE On-Site Monitoring/Sampling | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| January 17, 2019 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| May 29, 2018 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| April 4, 2018 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| March 27, 2018 | FCE On-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| May 31, 2017 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
Violations
- 0Violation determinations since January 1, 2017
- 0Of them high-priority
A high-priority violation (HPV) is the most serious class of Clean Air Act non-compliance an agency records; a federally reportable violation (FRV) is the next step down. Each row is one determination as EPA’s violation history files it.
EPA’s violation history file holds no violation for ICIS-AIR PA000726031 since January 1, 2017.
Enforcement and penalties
3 formal enforcement actions since January 1, 2017, 2 of them with a penalty filed above zero. Each penalty is shown as EPA’s formal action file states it; “Not stated” means the file gives no figure, and $0 is a disclosed zero.
| Date | What EPA recorded | Agency | Penalty, as filed |
|---|---|---|---|
| August 28, 2020 | CAA 113D1 Action For Penalty | U.S. EPA | $150,025 |
| March 28, 2017 | CAA 113D1 Action For Penalty | U.S. EPA | $95,000 |
| March 23, 2017 | CAA 113A Admin Compliance Order (Non-Penalty) | U.S. EPA | $0 |
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| January 17, 2019 | Notice of Violation | State |
Stack tests
- 12Stack tests since January 1, 2017
- 0Recorded as failed
| Date | What EPA recorded | Agency |
|---|---|---|
| September 16, 2026 | Pass | State |
| September 17, 2025 | Pass | State |
| May 27, 2025 | Pass | State |
| October 1, 2024 | Pass | State |
| October 19, 2023 | Pass | State |
| October 6, 2022 | Pass | State |
| October 8, 2021 | Pass | State |
| October 8, 2021 | Pass | State |
| October 15, 2020 | Pass | State |
| October 16, 2019 | Pass | State |
| October 12, 2018 | Pass | State |
| October 24, 2017 | Pass | State |
Cited to the EPA ICIS-AIR evaluation, violation, stack test and enforcement files (ECHO download), events dated January 1, 2017 or later as loaded; up to 50 rows of each shown, newest first.
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How we handle your data → Privacy
EPA publishes a free Detailed Facility Report for every source on ECHO: its compliance status quarter by quarter, its evaluations, and its violations, enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter EPA facility registry ID 110060012418 there.
Nearby on the register
- Air-emissions sources in Butler County
- Every source record in Butler County, A to Z
- Air-emissions sources in Pennsylvania
- Every source record in Pennsylvania, A to Z
Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.