FRS Facility Detail Report


MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART

EPA Registry Id: 110043577457
HWY 231
MOUNT PLEASANT, PA 15340


The facility locations displayed
come from the FRS Spatial
Coordinates tables. They are the
best representative locations for
the displayed facilities based on
the accuracy of the collection
method and quality assurance
checks performed against each
location. The North American
Datum of 1983 is used to display
all coordinates.

Environmental Interests

Information System System Facility Name Information System Id/Report Link Environmental Interest Type Data Source Last Updated Date Supplemental Environmental Interests:
PENNSYLVANIA - ENVIRONMENTAL FACILITY APPLICATION COMPLIANCE TRACKING SYSTEM MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART 30-0528059-9 STATE MASTER PA-EFACTS

AIR FACILITY SYSTEM
MARKWEST LIBERTY MIDSTREAM & RESOURCES/N 4212500236 AIR MINOR (OPERATING) AIRS/AFS 09/11/2014
ICIS-AIR (AIR)
MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART PA000708698 AIR SYNTHETIC MINOR ICIS 02/17/2016
COMPLIANCE AND EMISSIONS DATA REPORTING INTERFACE
MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART CEDRI10105241 COMPLIANCE AND EMISSIONS REPORTING API 10/24/2023

Additional EPA Reports:  

MyEnvironment  Enforcement and Compliance  Facility Coordinates Viewer  Watershed Report

Standard Industrial Classification Codes (SIC)

Data Source SIC Code Description Primary
AIR
1311
CRUDE PETROLEUM AND NATURAL GAS

PA-EFACTS
1311
CRUDE PETROLEUM AND NATURAL GAS

AIRS/AFS
1311
CRUDE PETROLEUM AND NATURAL GAS

Facility Codes and Flags

EPA Region: 03
Duns Number:
Congressional District Number: 18
Legislative District Number:
HUC Code/Watershed: 05030101 / UPPER OHIO
US Mexico Border Indicator:
Federal Facility: NO
Tribal Land: NO

Alternative Names

Alternative Name Source of Data
MARKWEST LIBERTY MIDSTREAM & RESOURCES/N FRS
MARKWEST LIBERTY MIDSTREAM & RESOURCES/N AIR

Organizations

Affiliation Type Name DUNS Number Information System Mailing Address
MAILING ADDRESS
MARKWEST LIBERTY MIDSTREAM
AIR
View
OWNER/OPERATOR
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLC
PA-EFACTS
View
OTHER CONTACT
MARKWEST LIBERTY MIDSTREAM & RESOURCES LLC
PA-EFACTS
View
MAILING ADDRESS
MARKWEST LIBERTY MIDSTREAM
AIR
View
MAILING ADDRESS
MARKWEST LIBERTY MIDSTREAM AND RESOURCES, L.L.C.
AIR
View

National Industry Classification System Codes (NAICS)

Data Source NAICS Code Description Primary
AIR 213112 SUPPORT ACTIVITIES FOR OIL AND GAS OPERATIONS.
AIRS/AFS 211111 CRUDE PETROLEUM AND NATURAL GAS EXTRACTION.
AIR 211111 CRUDE PETROLEUM AND NATURAL GAS EXTRACTION.

Facility Mailing Addresses

Affiliation Type Delivery Point City Name State Postal Code Information System
OTHER CONTACT 1515 ARAPAHOE ST STE 700 DENVER 08 80202-2126 PA-EFACTS
OWNER/OPERATOR 1515 ARAPAHOE ST STE 700 DENVER 08 80202-2126 PA-EFACTS
MAILING ADDRESS 4600 JBARRY CT STE 500 CANONSBURG PA 15317-5854 AIR
FACILITY MAILING ADDRESS HWY 231 MOUNT PLEASANT 42 PA-EFACTS
MAILING ADDRESS 4600 J BARRY COURT SUITE 500 CANONSBURG PA 15317 AIR

Contacts

Affiliation Type Full Name Office Phone Information System Mailing Address
FACILITY SITE CONTACT
NATHAN WHELDON
3035420686
AIR


PRIMARY FACILITY CONTACT
DAVID ETTORE
7248732803
AIR


Query executed on: OCT-14-2025