Additionally requires: balancing, climbing, crawling, crouching, feeling, grasping, handling, hearing voices and distinguishing among sounds, kneeling, lifting, manual dexterity, mental acuity, pulling, pushing, reaching, repetitive motion, speaking, standing, stooping, expressing ideas by the spoken word and shouting to be heard above ambient noise, visual acuity in data/color/observations/operating equipment/inspect defects or measurements, and walking. Skill in performing addition, subtraction, multiplication and division; calculating decimals, percentages, and fractions; computing discounts, interest, and ratios; and calculating surface areas, volumes, weights, and measures.