Knowledge, Skills, and Abilities: Some knowledge of general trench work and pipefitting; pumping systems; hazards and precautions associated with trench work line construction; interpersonal communication skills; basic hand and power tools required to install and maintain pipe line; pipe classifications and type; the occupational hazards and safety precautions of trench work construction and pipeline maintenance work; hazards common to heavy equipment operation; drain system construction methods etc. Frequently, tasks require a variety of physical activities, generally involving muscular strain, related to walking, standing, stooping, sitting, reaching, and lifting; daily potential for hazardous exposure to electrical shock, industrial wastes and raw sewage (containing pathogens such as typhoid, paratyphoid, dysentery, polio, tetanus, etc.); daily exposure to moving parts and equipment such as pumps, motors, heavy equipment, etc.