Comparison of two screening techniques for a large, regulatory, air quality modeling project

This study was a hypothetical Prevention of Significant Deterioration (PSD) increment analysis for sulfur dioxide in Harris County, Texas. The area of significant impact was hypothetically assumed to include an area approximately 24 kilometers north-south by 44 kilometers east-west, which surrounds the Houston, Texas ship channel. The area includes chemical, oil refinery, power generation, and other industries. The modeling was limited to PSD increment calculations for the 24 hour averaging time and used the Environmental Protection Agency's (EPA) Multiple Point Source with Terrain Adjustment (MPTER) model