2024 40 CFR 52.2454 – Prevention of significant deterioration of air quality for Merck & Co., Inc.’s Stonewall Plant in Elkton, VA

2023 40 CFR 52.2454 – Prevention of significant deterioration of air quality for Merck & Co., Inc.’s Stonewall Plant in Elkton, VA

2022 40 CFR 52.2454 – Prevention of significant deterioration of air quality for Merck & Co., Inc.’s Stonewall Plant in Elkton, VA

2021 40 CFR 52.2454 – Prevention of significant deterioration of air quality for Merck & Co., Inc.’s Stonewall Plant in Elkton, VA

2015 40 CFR 52.2454 – Prevention of significant deterioration of air quality for Merck & Co., Inc.’s Stonewall Plant in Elkton, VA

2014 40 CFR 52.2454 – Prevention of significant deterioration of air quality for Merck & Co., Inc.’s Stonewall Plant in Elkton, VA