Hydrostatic Test General Permit

Announcements

The Mississippi Department of Environmental Quality is considering the reissuance of a statewide Hydrostatic Test General Permit. This permit covers the State of Mississippi and will authorize sporadic discharges of hydrostatic test water to waters of the State from new or used pipelines, storage tanks, flowlines, etc., used for transportation or storage of natural gas, crude oil, or liquid or gaseous petroleum hydrocarbons, or other substances which would adequately be detected by the effluent limitations in this permit.

Draft Permit
Public Notice

The Hydrostatic Test General Permit expiring on February 28, 2022 has been administratively continued.  All coverage holders should continue to comply with the previous general permit until a new general permit has been issued. MDEQ is working on the reissuance of this permit.  When the permit has been reissued, current coverage holders will received instructions detailing steps needed for continued coverage.  Please do not send application for recoverage until the HTGP has been reissued.

Hydrostatic Test General Permit

Facilities or projects that receive coverage under Mississippi’s Hydrostatic Test General Permit may discharge hydrostatic test water from new pipelines, storage tanks, flowlines, etc. or used pipelines, storage tanks, flowlines, etc. that have been used for the transportation or storage of natural gas, crude oil, or liquid or gaseous petroleum hydrocarbons, or other substances which would adequately be detected by the effluent limitations of this permit into State waters.

This permit may also cover storm water discharges associated with pipeline or storage tank construction, including clearing, grading and excavation disturbing one (1) or more acres. Construction activities associated with oil and gas exploration, production, processing and treatment, and transmission facilities that are defined in the following North American Industrial Classification System (2002 NAICS) codes and titles: 211-Oil and Gas Extraction, 213111-Drilling Oil and Gas Wells, 213112-Support Activities for Oil and Gas Operations, 48611-Pipeline Transportation of Crude Oil and 48621-Pipeline Transportation of Natural Gas, are generally exempt from the construction requirements of this general permit.