FRS Facility Detail Report


MARKWEST LANGLEY PROCESSING PLANT

EPA Registry Id: 110000536288
72 MAPLE STREET
LANGLEY, KY 41645


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:
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (ICIS-NPDES)
MARKWEST ENERGY APPALACHIA LLC KY0000400 ICIS-NPDES NON-MAJOR ICIS 09/25/2020 ICIS-
ENFORCEMENT/COMPLIANCE ACTIVITY
ICIS-AIR (AIR)
MARKWEST ENERGY APPALACHIA LLC KY0000002107100160 AIR MINOR ICIS 04/19/2018
ICIS-AIR (AIR)
MARKWEST HYDROCARBONS LLC - LANGLEY PROCESSING PLANT KY0000002107100140 AIR SYNTHETIC MINOR ICIS 09/30/2018
AIR FACILITY SYSTEM
MARKWEST ENERGY APPALACHIA LLC 2107100140 AIR MAJOR () AIRS/AFS
ICIS-
ENFORCEMENT/COMPLIANCE ACTIVITY
AIR FACILITY SYSTEM
MARKWEST ENERGY APPALACHIA LLC 2107100140 AIR SYNTHETIC MINOR (OPERATING) AIRS/AFS 05/14/2014 ICIS-
ENFORCEMENT/COMPLIANCE ACTIVITY
RISK MANAGEMENT PLAN
MARKWEST LANGLEY PROCESSING PLANT 100000024779 RMP REPORTER RMP

EMISSION INVENTORY SYSTEM (EIS)
MARKWEST HYDROCARBONS LLC - LANGLEY PROCESSING PLANT 5070511 AIR SYNTHETIC MINOR EIS 03/17/2025
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (ICIS-NPDES)
MARKWEST ENERGY APPALACHIA LLC KYR10F673 STORM WATER CONSTRUCTION ICIS 04/27/2011 ICIS-
ENFORCEMENT/COMPLIANCE ACTIVITY
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (ICIS-NPDES)
MARKWEST ENERGY APPALACHIA LLC - LANGLEY PROCESSING PLANT KYR10G089 STORM WATER CONSTRUCTION ICIS 10/05/2011 ICIS-
ENFORCEMENT/COMPLIANCE ACTIVITY
COMPLIANCE AND EMISSIONS DATA REPORTING INTERFACE
MARKWEST LANGLEY PROCESSING PLANT CEDRI10107664 COMPLIANCE AND EMISSIONS REPORTING API 05/29/2025
EMISSION INVENTORY SYSTEM (EIS)
MARKWEST ENERGY APPALACHIA LLC 10682711 CRITERIA AIR POLLUTANT MAJOR EIS 08/26/2021
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (ICIS-NPDES)
MARKWEST ENERGY APPALACHIA LLC KYR10F673 ICIS-NPDES NON-MAJOR ICIS 04/27/2011 ICIS-
ENFORCEMENT/COMPLIANCE ACTIVITY
RESOURCE CONSERVATION AND RECOVERY ACT INFORMATION SYSTEM
MARKWEST HYDROCARBON, LLC-LANGLEY PROCESSING FACILITY KYD985087204 VSQG (Y) RCRAINFO

NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (ICIS-NPDES)
MARKWEST ENERGY APPALACHIA LLC - LANGLEY PROCESSING PLANT KYR10G089 ICIS-NPDES NON-MAJOR ICIS 10/05/2011 ICIS-
ENFORCEMENT/COMPLIANCE ACTIVITY

Additional EPA Reports:  

MyEnvironment  Enforcement and Compliance  Facility Coordinates Viewer  Watershed Report

Standard Industrial Classification Codes (SIC)

Data Source SIC Code Description Primary
NPDES
1321
NATURAL GAS LIQUIDS

AIR
1321
NATURAL GAS LIQUIDS

AIR
1321
NATURAL GAS LIQUIDS

NPDES
1321
NATURAL GAS LIQUIDS

NPDES
1321
NATURAL GAS LIQUIDS

AIR
1311
CRUDE PETROLEUM AND NATURAL GAS

AIRS/AFS
1321
NATURAL GAS LIQUIDS

Facility Codes and Flags

EPA Region: 04
Duns Number:
Congressional District Number: 05
Legislative District Number: 06
HUC Code/Watershed: 05070203 / LOWER LEVISA
US Mexico Border Indicator:
Federal Facility: NO
Tribal Land: NO

Alternative Names

Alternative Name Source of Data
MARKWEST ENERGY APPALACHIA LLC - LANGLEY PROCESSING PLANT EIS
KENTUCKY HYDROCARBON CO NEI99-CRT
KY HYDROCARBON, LANGLEY COMPRESSION AIRS/AFS
MARKWEST ENERGY APPALACHIA, LLC-LANGLEY PROCESSING FACILITY RCRAINFO
MARKWEST ENERGY APPALACHIA LLC NPDES

Organizations

Affiliation Type Name DUNS Number Information System Mailing Address
PERMITTEE
MARKWEST ENERGY APPALACHIA LLC - LANGLEY PROCESSING PLANT
AIR
View
MAILING ADDRESS
MARKWEST ENERGY APPALACHIA LLC
NPDES
View
OWNER
MARKWEST ENERGY APPALACHIA, LLC.
RCRAINFO


MAILING ADDRESS
MARKWEST ENERGY APPALACHIA LLC
NPDES
View
PREPARER
NATHAN WHELDON
RMP
View
PREPARER
NATHAN WHELDON
RMP


OWNER
MARKWEST ENERGY APPALACHIA LLC
NPDES
View
PREPARER
NATHAN WHELDON
RMP
View
PREPARER
NATHAN WHELDON
RMP
View
OPERATOR
MARKWEST ENERGY APPALACHIA, LLC.
RCRAINFO


MAILING ADDRESS
MARKWEST ENERGY APPALACHIA, LLC
NPDES
View
OWNER
MARKWEST ENERGY APPALACHIA LLC - LANGLEY PROCESSING PLANT
AIR


PERMITTEE
MARKWEST HYDROCARBONS LLC - LANGLEY PROCESSING PLANT
AIR


OWNER
MPLX G&P
RCRAINFO


MAILING ADDRESS
MARKWEST ENERGY APPALACHIA LLC - LANGLEY PROCESSING PLANT
NPDES
View
PARENT COMPANY 1
MARKWEST HYDROCARBON
RMP


OPERATOR
MARKWEST ENERGY APPALACHIA, LLC
RCRAINFO


National Industry Classification System Codes (NAICS)

Data Source NAICS Code Description Primary
RMP 211112 NATURAL GAS LIQUID EXTRACTION.
AIR 211130

NPDES 211112 NATURAL GAS LIQUID EXTRACTION.
AIRS/AFS 211112 NATURAL GAS LIQUID EXTRACTION.
NPDES 211112 NATURAL GAS LIQUID EXTRACTION.
RCRAINFO 23712 OIL AND GAS PIPELINE AND RELATED STRUCTURES CONSTRUCTION
AIR 211112 NATURAL GAS LIQUID EXTRACTION.
NPDES 211112 NATURAL GAS LIQUID EXTRACTION.
AIR 325199 ALL OTHER BASIC ORGANIC CHEMICAL MANUFACTURING.
EIS 211130

EIS 325199 ALL OTHER BASIC ORGANIC CHEMICAL MANUFACTURING.
RMP 21113

Facility Mailing Addresses

Affiliation Type Delivery Point City Name State Postal Code Information System
PREPARER 1515 ARAPAHOE ST. DENVER CO 802022137 RMP
REGULATORY CONTACT 72 MAPLE STREET LANGLEY KY 416452137 RCRAINFO
REGULATORY CONTACT 402 JOHN M STUMBO DR LANGLEY KY 41645 RCRAINFO
OWNER/OPERATOR 72 MAPLE STREET LANGLEY KY 41645 RMP
PREPARER 1515 ARAPAHOE ST DENVER CO 80202-3150 RMP
OWNER 1515 ARAPAHOE ST TOWER 1 STE 1600 DENVER CO 80202 NPDES
PREPARER 1515 ARAPAHOE ST DENVER CO 80202 RMP
FACILITY MAILING ADDRESS 72 MAPLE STREET LANGLEY KY 416452137 AIRS/AFS
FACILITY MAILING ADDRESS 72 MAPLE STREET LANGLEY KY 416452137 RCRAINFO
PERMITTEE 72 MAPLE STREET LANGLEY KY 416452137 AIR
MAILING ADDRESS 72 MAPLE STREET LANGLEY KY 416452137 NPDES

Contacts

Affiliation Type Full Name Office Phone Information System Mailing Address
COMPLIANCE CONTACT
MARK JOHNSON


AIR


COMPLIANCE CONTACT
MARK JOHNSON
606-530-3083
AIR


COMPLIANCE CONTACT
JENNIFER OSBORNE
6069328216
AIR


REGULATORY CONTACT
MARK JOHNSON
606-530-3083
RCRAINFO
View
REGULATORY CONTACT
MARK JOHNSON
606-285-3949
RCRAINFO
View
PRIMARY FACILITY SITE CONTACT
JENNIFER OSBORNE
606-285-3949
NPDES


UNKNOWN CONTACT
CHRISTINE TRONTELL
3039259202
AIR


COMPLIANCE CONTACT
CHRISTINE TRONTELL
3039259202
AIR


PRIMARY FACILITY SITE CONTACT
KEITH HAYES


NPDES


Query executed on: OCT-14-2025