Air Impact Analysis and Permitting Support for Phase II of the West Deptford Energy Station

West Deptford Energy Station


West Deptford Energy Station


West Deptford, NJ


West Deptford Energy, LLC (LS Power)

AKRF provided air quality permitting and dispersion modeling services supporting the proposed Phase II expansion of the West Deptford Energy Station in Gloucester County, New Jersey.

The Phase II expansion is a proposed 400-MW combined-cycle addition to the existing 783-MW combined-cycle Phase I portion of the station. All units are—and will be—fueled exclusively by natural gas.

While the overall dispersion modeling analysis was performed in support of the Title V Significant Modification and Prevention of Significant Deterioration (PSD) permitting requirements for the Phase II unit, the significant impact modeling analysis included both Phase I and Phase II emissions at the request of the U.S. Environmental Protection Agency (USEPA) Region II. Cumulative impact (i.e., “multisource”) modeling was required for the pollutants PM2.5 and NO2. The cumulative impact analysis required the development of extensive point source potential emissions inventories across a 1,200 km2 region, including portions of New Jersey, Delaware, and Pennsylvania.

AKRF developed these inventories from Title V permits, aerial photography, and input from state and local air agencies. The area is one of the most heavily industrialized on the east coast containing five major refineries, 16 power plants, and numerous other heavy industrial installations.

AKRF worked with the New Jersey Department of Environmental Protection (NJDEP) to ensure the analysis conformed to evolving regulatory and modeling methodology issues. In the final analysis, AKRF was able to demonstrate that the emissions from the West Deptford Energy Station did not significantly contribute to predicted National Ambient Air Quality Standards (NAAQS) exceedances resulting from the operations of regional sources.

In addition to the modeling support, AKRF also supported LS Power’s permitting effort by providing Title V permitting support in two areas: the preparation of a Title V Significant Modification application for the installation of black start capability at the station and the Title V renewal application for the Phase I portion of the station.

Air Quality Overview