Also requires the exertion up to 20 pounds of force constantly to move objects; work requires climbing, balancing, stooping, kneeling, crouching, reaching, standing, walking, pushing, pulling, lifting, fingering and grasping; vocal communication is required for expressing or exchanging ideas by means of the spoken word; hearing is required to perceive information at normal spoken word levels; visual acuity is required for color perception, preparing and analyzing written or computer data, visual inspection involving small defects and/or small parts, use of measuring devices, assembly or fabrication of parts at or within arm's length, operation of machines, operation of motor vehicles or equipment, determining the accuracy and thoroughness of work, and observing general surroundings and activities; the worker is subject to inside and outside environmental conditions, noise, vibration, hazards, atmospheric conditions, oils and wearing a respirator. Possess the ability to learn the operating characteristics and maintenance requirements of a water treatment plant, basic knowledge of hydraulic, chemical and mechanical principles pertinent to water treatment plant operations, general knowledge of the occupational hazards of the work and of the necessary safety precautions, ability to understand and follow oral and written instructions, ability to read meters and charts accurately, some skill in the use and care of hand tools.