What is the primary method for controlling atmospheric hazards in confined spaces?

Ventilation control is the primary method for managing atmospheric hazards in confined spaces because it enhances air quality by introducing fresh air while removing contaminated air. This process effectively reduces hazardous gases, vapors, and particulate matter, creating a safer environment for workers. By utilizing mechanical or natural ventilation methods, the concentration of toxic substances can be minimized, which is crucial for maintaining breathable air within the confined space.

Isolation control, while vital in certain scenarios, primarily focuses on limiting access to a confined space and preventing entry of contaminants rather than directly addressing the quality of the atmosphere inside. Dilution control, although effective in specific contexts, is a part of the ventilation process where fresh air dilutes contaminants but does not actively replace the air. Absorption control involves materials that can capture or neutralize airborne substances, but it does not replace the need for effective air circulation that ventilation provides. Thus, ventilation remains the most comprehensive and direct approach to controlling atmospheric hazards in these environments.