FLAG AIR, LLC Stormwater Outfall in Birmingham, Alabama

FLAG AIR, LLC is a stormwater outfall located at 4824 69th Street North in Birmingham, Jefferson County, Alabama. The facility operates under the US EPA NPDES MS4 permit framework, which regulates stormwater discharges from municipal separate storm sewer systems in urbanized areas. As an outfall associated with airport transportation services (NAICS 488119), it manages runoff from industrial and commercial surfaces. The facility's stormwater management is subject to the Clean Water Act and Alabama's NPDES program. Typical controls for such outfalls include best management practices (BMPs) like sediment basins, oil-water separators, and regular monitoring to prevent pollutants from entering receiving waters. The scale of discharge is consistent with medium-sized industrial facilities in the region. Environmental significance lies in its role in protecting local water quality in the Birmingham area, which drains to the Black Warrior River basin. Proper stormwater management at this outfall helps mitigate impacts from urban runoff, including sediment, heavy metals, and hydrocarbons, supporting compliance with Total Maximum Daily Load (TMDL) requirements for impaired water bodies.

Birmingham's stormwater outfalls operate within the Black Warrior River watershed, which faces challenges from urban and industrial runoff. The region's clay soils and hilly terrain increase erosion and sediment transport. Regulatory oversight under the EPA's NPDES MS4 program requires permits for discharges to waters of the U.S., with Phase II rules applying to smaller municipalities like Birmingham. Compliance focuses on reducing pollutants through structural and non-structural controls.