NPDES Stormwater Industrial and Construction Inspection Report National Database Information Inspection Date:03/04/2025 NPDES ID Number: COR05I301 Entry/Exit Time: 9:00/15:00 Inspection ID: 202503_COR05I301 Facility Type: Gas Processing Plant Inspection Type: Stormwater Industrial SIC Code: 1321 Natural Gas Liquids Lead Inspector/Affiliation/Telephone: Kevin Stockton/ERG/720-789-8050 Inspector/Affiliation/Telephone: Shannon Egger/ERG/703-633-1600 Inspector/Affiliation/Telephone: Geoff Hensgen/Southern Ute Indian Tribe/970-563-3111 Facility Location Information Site/Facility and Location: Mailing address: Ignacio Gas Plant 3746 Country Road 307 Durango, Colorado 81303 La Plata County Harvest Four Corners, LLC 1755 Arroyo Dr, Bloomfield, New Mexico 87413 Latitude: 37.1442779 N Longitude: -107.7864066 W Receiving Water(s): Unnamed tributary to Florida River Impaired waters: No Contact Information Permittee (owner): Co-Permittee: Authorized Official: Facility Contact(s): Facility Operator: Name and Title Harvest Four Corners, LLC N/A Mike Perkerewicz, Facility Foreman Monica Smith, Environmental Specialist Chad Snell, Environmental Specialist - Contractor Nathan Work, Operations Manager Industrial Permit Information Date NOI Submitted: 05/25/2021 SWPPP on site: Yes SWPPP Implementation Satisfactory: No (refer to Findings 2-5) Permit Effective Date: 06/24/2021 Copy of NOI on site: Yes SWPPP Satisfactory: No (refer to Finding 1) Satisfactory SWPPP must be current and complete Expiration Date: 02/28/2026 Harvest Four Corners, LLC 1 of 12 NPDES Stormwater Industrial and Construction Inspection Report Areas Evaluated During Inspection Permit Records Facility Site Review Effluent/Receiving Waters Self-Monitoring Program Compliance Schedule Laboratory Operations and Maintenance Report Review and Signature Inspector Signature/Name Kevin Stockton Reviewer Signature/Name Stephanie Meyers Supervisor Signature/Name EMILIO Digitally signed by EMILIO LLAMOZAS LLAMOZAS 15:25:19 -06'00' Date: 2025.04.17 Emilio Llamozas Address/Phone Number ERG Golden Office 1113 Washington Avenue Suite 300 Golden, CO 80401 720-789-8050 Address/Phone Number U.S.

Lead Inspector & Report Author: Kristin McNeill, U.S.

Environmental Protection Agency (EPA): Timothy Evans, Life Scientist, ECAD/CB/RCRA (Lead Inspector) 3.0 INSPECTION PROCEDURES February 15, 2023 Mses.

Lead Inspector & Report Author: Annette Maxwell, U.S.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 1 BOSTON, MA 02109 URGENT LEGAL MATTER - - PROMPT REPLY NECESSARY SENT VIA EMAIL Date on electronic signature Mr.

Attendees Title/Organization Name Lead Inspector/ Contactor/ERG Brook McKeown RCRA Inspector/ Contractor/ERG George Wieber Inspector/Enforcement Joyce Officer/EPA Region 6 Johnson Inspector/Enforcement Dedriel Officer/EPA Region 6 Gardner Phone Email (410) 459-5811 Brook.McKeown@erg.com Opening Conf.

U.S.

3 ECONOMICS CELEBRATING ECONOMICS FOR THE ENVIRONMENT eftec SEA of restricting the use of PFAS in filters Final Report W.

3 ECONOMICS CELEBRATING ECONOMICS FOR THE ENVIRONMENT eftec SEA of restricting the use of PFAS in filters Final Report W.

U.S.

3 ECONOMICS CELEBRATING ECONOMICS FOR THE ENVIRONMENT eftec SEA of restricting the use of PFAS in filters Final Report W.

Earthjustice/Sierra Club 2025-EPA-05146 ED_018033_00000561-00656 SC_EVERSPLIT0031374 1/10/2025 Amendment 02D54623 Region 4 Hazardous Substances Response Trust Fund (V) Earthjustice/Sierra Club 2025-EPA-05146 ED_018033_00000561-00657 SC_EVERSPLIT0031375 AL DEPARTMENT 1ENVIRONMENTAL MANAGEMENT State 10/1/2023 9/30/2025 $9,049.00 Earthjustice/Sierra Club 2025-EPA-05146 ED_018033_00000561-00658 SC_EVERSPLIT0031376 Superfund State Political Subdivision and Indian Tribe Site-Specific Cooperative Agreements Earthjustice/Sierra Club 2025-EPA-05146 ED_018033_00000561-00659 SC_EVERSPLIT0031377 Description: This action provides partial funding in the amount of $16,535 to support the Alabama Department of Environmental Management for activities including but not limited to the review of remedial investigation and feasibility studies, proposed plans, and records of decision at Superfund sites in Alabama when the Environmental Protection Agency (EPA) is the lead agency for remedial action.

Ground-level O3 and PM are detrimental to human health, leading to several million premature deaths per year globally, and have adverse effects on plants and the yields of crops.

Chemours Thermal & Specialized Solutions (TSS) contribution to the universal PFAS restriction ECHA Public Consultation 21 September 2023 Attachment 2 1 Table of Contents A.

Attendees Title/Organization Lead Inspector/ Contractor/ERG RCRA Inspector/ Contractor/ERG Inspector/Enforcement Officer/EPA Region 6 Inspector/Enforcement Officer/EPA Region 6 Name Phone Email Opening Closing Conf.