While performing the duties of this job the employee is frequently exposed to wet and/or humid conditions, moving mechanical parts, fumes or airborne particles, toxic or caustic chemicals, outside weather conditions, underground work locations, working from heights, risk of electrical shock, explosives, and vibration. While performing the duties of this job, the employee is frequently required to stand, walk, or sit for extended periods of time; use hands to finger, handle, or feel; reach with hands and arms; climb or balance; stoop, kneel, crouch, or crawl; regularly required to talk and hear.