V.A.1.

APCD General Permit GP09

GENERAL CONSTRUCTION PERMIT — Oil and Gas — Well Production Facilities (attainment areas) — GP09 Issuance 3, July 23, 2025

GP09 Issuance 3 is a general construction permit for oil and gas well production facilities located in attainment areas, issued July 23, 2025. The permit covers applicability, operating conditions, emission limits, testing, monitoring, recordkeeping, special monitoring requirements for facilities in Disproportionately Impacted Communities, registration and approval procedures, and general permit administration.

I.A.

This permit covers oil and gas well production facilities (as defined in Regulation Number 7, Part B, Section II.A.) in attainment areas. Equipment eligible for the permit includes natural gas-fired reciprocating engines, storage tanks for condensate/crude/intermediate hydrocarbons/produced water, hydrocarbon liquid loading to trucks, gas venting from separators, fugitive component leaks, natural gas-driven pneumatic controllers and diaphragm pumps, natural gas-fired turbines, certain routine or predictable venting events from fixed-roof tanks (like thief hatch releases, sampling, truck loadout, hot oil treatments), well-related routine venting (liquids unloading, downhole maintenance, bradenhead/casinghead venting), pigging-related venting (pig launchers/receivers), routine blowdowns of facility equipment or piping (compressor/turbine blowdowns, scrubber/strainer blowdowns, shutdown-related blowdowns), and control equipment (combustion devices, vapor recovery units, catalysts) used to reduce emissions below the permit's Section III limits. Blowdowns from equipment or piping with a physical volume under 50 cubic feet between isolation valves do not need to be reported or permitted, and the permit does not cover tank emissions not listed in Section I.A.9.a. or tank venting prohibited by Regulation Number 7, Part B, Section II.C.2.a.

I.A.9.a.

The permit allows registration of routine or predictable venting from fixed-roof storage tanks that isn't already covered by a separate permit, including venting through thief hatches, blowdown valves, or other access points during activities like liquid level measurement, sampling, truck loadout, well unloading, equipment maintenance, repair, decommissioning, tank hot oil treatments, or other tank cleaning.

I.A.9.b.

The permit covers well-related routine or predictable gas venting events that don't have their own separate permit, including liquids unloading, downhole maintenance (workovers, recompletion, restimulation, reperforating, paraffin/scale removal, swabbing, artificial lift installation), surface equipment maintenance, well plugging, bradenhead gas venting, casinghead gas venting, and similar routine well venting activities.

I.A.9.d.

The permit covers routine or predictable blowdowns of facility equipment or piping that are not separately permitted, including pipeline venting within the facility boundary, compressor and turbine blowdowns, scrubber and strainer blowdowns, blowdowns from facility-wide or equipment shutdowns, blowdown of pipelines, compressor cases or cylinders, manifolds, suction bottles, discharge bottles, vessels, and desiccant dehydration unit blowdowns. Blowdowns from equipment or piping where the physical volume between isolation valves is less than 50 cubic feet do not need to be reported or permitted under this category.