Western Boundary of Arsenal Air Monitoring Station, Commerce City, Colorado

Western Boundary of Arsenal is an air monitoring station located at the Rocky Mountain Arsenal in Commerce City, Colorado, United States. The station is part of the environmental monitoring network operated by the US Army to track air quality around the former chemical weapons production and storage site. It serves as a key sentinel for detecting potential contaminants from the arsenal's remediation activities. The station operates under the regulatory framework of the US EPA's Air Quality System (AQS) and the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) for the Rocky Mountain Arsenal Superfund site. Typical air monitoring stations in this context measure criteria pollutants such as particulate matter (PM10, PM2.5), volatile organic compounds (VOCs), and other hazardous air pollutants. The station's siting at the western boundary provides representative sampling for off-site exposure assessment. The Rocky Mountain Arsenal is a former chemical weapons manufacturing facility that has undergone extensive environmental cleanup. The Western Boundary of Arsenal station plays a critical role in verifying the effectiveness of remediation efforts and ensuring the safety of surrounding communities. Continuous monitoring data supports the long-term stewardship of the site and informs public health decisions.

The station is located at the western boundary of the Rocky Mountain Arsenal, a Superfund site in Adams County, Colorado. The local environmental context includes industrial history with chemical weapons production and subsequent remediation. Air monitoring focuses on detecting residual contaminants such as organochlorine pesticides, nerve agents, and heavy metals. The station's location provides representative data for assessing off-site migration of airborne pollutants toward the Denver metropolitan area.