EPA Air · stack tests by county and year

Air-emissions stack tests in Butler County, Pennsylvania, 2020

23Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Butler County, Pennsylvania during 2020. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Butler County facility page.

Butler County, Pennsylvania, 2020

Air-emissions stack tests in Butler County, other years

Air-emissions stack tests recorded in Butler County, Pennsylvania, 2020

Date	Facility	Kind	Agency
2020-12-10	ARMSTRONG CEMENT & SUPPLY/WINFIELD — high-priority violation on file	Pass	State
2020-11-20	CALUMET KARNS CITY REF LLC/KARNS CITY	Pass	State
2020-10-30	ONEIDA VALLEY MIDSTRAM LLC/CONSTELLATION COMP STA	Pass	State
2020-10-22	PINE RUN MIDSTREAM LLC/BICKER COMP STA	Pass	State
2020-10-15	MARKWEST LIBERTY BLUESTONE LLC/SARSEN GAS PROC PLT	Pass	State
2020-10-09	MTN GATHERING LLC/FORWARD COMP STA	Pass	State
2020-10-06	MTN GATHERING LLC/JEFFERSON COMP STA	Pass	State
2020-09-28	CLEVELAND CLIFFS STEEL CORP/ BUTLER WORKS	Pass	State
2020-09-17	COHERENT CORP SAXONBURG PLT	Pass	State
2020-08-28	MARKWEST LIBERTY BLUESTONE LLC/BLUESTONE GAS PROC PLT	Pass	State
2020-08-27	MARKWEST LIBERTY BLUESTONE LLC/TRILLITH COMP STA	Pass	State
2020-08-05	MARKWEST LIBERTY BLUESTONE LLC/ROYAL OAK COMP STA	Pass	State
2020-07-27	UGI MORAINE EAST GATHERING LLC/RENICK COMP STA	Pass	State
2020-07-23	PINE RUN MIDSTREAM LLC/BASS COMP STA	Pass	State
2020-07-14	PINE RUN MIDSTREAM LLC/BICKER COMP STA	Pass	State
2020-07-01	MARKWEST LIBERTY BLUESTONE LLC/BLUESTONE GAS PROC PLT	Pass	State
2020-06-24	VORTEQ COIL FINISHERS/VALENCIA PLT	Pass	State
2020-06-09	ARMSTRONG CEMENT & SUPPLY/WINFIELD — high-priority violation on file	Pass	State
2020-05-14	RIVERWEST APPALACHIA MIDSTREAM LLC/CLINTON COMP STA	Pass	State
2020-04-17	ARMSTRONG CEMENT & SUPPLY/WINFIELD — high-priority violation on file	Pass	State
2020-03-20	MARKWEST LIBERTY BLUESTONE LLC/VOLL COMP STA	Pass	State
2020-02-21	ARMSTRONG CEMENT & SUPPLY/WINFIELD — high-priority violation on file	Pass	State
2020-02-12	ARMSTRONG CEMENT & SUPPLY/WINFIELD — high-priority violation on file	Pass	State

Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.