EPA Air · stack tests by county and year

Air-emissions stack tests in Washington County, Pennsylvania, 2019

55Stack 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 Washington County, Pennsylvania during 2019. 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 Washington County facility page.

Washington County, Pennsylvania, 2019

Air-emissions stack tests in Washington County, other years

Air-emissions stack tests recorded in Washington County, Pennsylvania, 2019

Date	Facility	Kind	Agency
2019-12-18	MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA	Pass	State
2019-12-13	UGI GIBRALTAR GATHERING LLC/GIBRALTAR COMP STA	Pass	State
2019-11-26	EQM GATHERING OPCO LLC/MCINTOSH COMP STA	Pass	State
2019-10-23	MARKWEST LIBERTY MIDSTREAM RES/DOWN HOME COMPRESSOR STATION	Pass	State
2019-10-11	MARKWEST LIBERTY MIDSTREAM/SMITH COMP STA	Pass	State
2019-10-08	NATL FUEL SUPPLY CORP/BUFFALO COMP STA	Pass	State
2019-10-04	MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA	Pass	State
2019-10-03	MARKWEST LIBERTY MIDSTREAM & RESOURCES/GODWIN COMP STA	Pass	State
2019-10-01	MARKWEST LIBERTY MIDSTREAM & RESOURCES/FULTON BOOSTER STA — high-priority violation on file	Pass	State
2019-10-01	MARKWEST LIBERTY MID & RES / HOSKINS BOOSTER COMP STA	Pass	State
2019-09-26	EQM GATHERING OPCO LLC/STEELHEAD COMP STA	Pass	State
2019-09-11	MARKWEST LIBERTY MIDSTREAM/BAKER COMP STA	Pass	State
2019-08-27	MARKWEST LIBERTY MIDSTREAM/ CARPENTER COMP STA	Pass	State
2019-08-26	DIVERSIFIED PROD LLC/NV 34 WELLPAD — high-priority violation on file	Pass	State
2019-08-26	DIVERSIFIED PROD LLC/NINEVEH 58 WELL PAD — high-priority violation on file	Pass	State
2019-08-26	DIVERSIFIED PROD LLC/NV 60 WELLPAD	Pass	State
2019-08-23	MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA	Pass	State
2019-08-22	MARKWEST LIBERTY MIDSTREAM & RESOURCES/JOHNSTON COMP STA	Pass	State
2019-08-15	MARKWEST LIBERTY MIDSTREAM/BRIGICH COMP STA	Pass	State
2019-08-14	MARKWEST LIBERTY M&R/TUPTA DAY COMP STA	Pass	State
2019-08-13	COLUMBIA GAS TRANS CORP/DONEGAL COMP STA	Pass	State
2019-08-13	MARKWEST LIBERTY MIDSTREAM/DRYER BOOSTER COMP STA	Pass	State
2019-06-26	EQM GATHERING OPCO LLC/KRYPTONITE COMP STA	Pass	State
2019-06-19	EQM GATHERING OPCO LLC/BLUE MOON COMP STA	Pass	State
2019-06-04	USA SOUTH HILLS LDFL/ UNION TWP	Pass	State
2019-05-30	EQM GATHERING OPCO LLC/TWILIGHT COMP STA	Pass	State
2019-05-24	MARKWEST LIBERTY MIDSTREAM & RESOURCES/HARMON CREEK GAS PLT — high-priority violation on file	Pass	State
2019-05-15	EQM GATHERING OPCO LLC/MAKO COMP STA	Pass	State
2019-05-10	ROVER PIPELINE LLC/BULGER COMP STA	Pass	State
2019-05-09	MARKWEST LIBERTY MIDSTREAM & RESOURCES/LOWRY COMP STA	Pass	State
2019-05-07	MARKWEST LIBERTY MIDSTREAM/ CARPENTER COMP STA	Pass	State
2019-05-06	MARKWEST LIBERTY MIDST & RESOURCES/THREE BROTHERS COMP STA	Pass	State
2019-05-01	MARKWEST LIBERTY MIDSTREAM & RESOURCES/REDD COMP STA	Pass	State
2019-04-30	MARKWEST LIBERTY MIDSTREAM & RESOURCES/SHAW COMP STA	Pass	State
2019-04-25	MARKWEST LIBERTY MIDSTREAM/BAKER COMP STA	Pass	State
2019-04-17	MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART	Pass	State
2019-04-16	MARKWEST LIBERTY MIDSTREAM/BAKER COMP STA	Pass	State
2019-04-15	MARKWEST LIBERTY MIDSTREAM/DRYER BOOSTER COMP STA	Pass	State
2019-04-12	MARKWEST LIBERTY MIDSTREAM/BRIGICH COMP STA	Pass	State
2019-04-10	MARKWEST LIBERTY MIDSTREAM/SMITH COMP STA	Pass	State
2019-04-09	MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA	Pass	State
2019-04-08	MARKWEST LIBERTY MIDSTREAM & RESOURCES/FULTON BOOSTER STA — high-priority violation on file	Pass	State
2019-04-02	EQT PROD CO/MOJO COMPRESSOR UNIT	Pass	State
2019-03-29	COLUMBIA GAS TRANS LLC/REDD FARM COMP STA	Pass	State
2019-03-15	CNX MIDSTREAM OPR CO LLC/NV-57 COMP STA	Pass	State
2019-03-08	MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART	Pass	State
2019-03-07	MARKWEST LIBERTY M&R/TUPTA DAY COMP STA	Pass	State
2019-03-06	MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA	Pass	State
2019-03-05	MARKWEST LIBERTY MIDSTREAM & RESOURCES/SHAW COMP STA	Pass	State
2019-03-05	MARKWEST LIBERTY MIDSTREAM & RESOURCES/LOWRY COMP STA	Pass	State
2019-03-05	COLUMBIA GAS TRANS LLC/REDD FARM COMP STA	Pass	State
2019-03-04	MARKWEST LIBERTY MIDST & RESOURCES/THREE BROTHERS COMP STA	Pass	State
2019-02-27	NATL FUEL SUPPLY CORP/BUFFALO COMP STA	Pass	State
2019-01-30	EQM GATHERING OPCO LLC/BLUE MOON COMP STA	Pass	State
2019-01-07	UGI GIBRALTAR GATHERING LLC/GIBRALTAR COMP STA	Pass	State

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