Intelligence: Requires the ability to apply principles of logical thinking to define problems, collect data, establish facts and draw valid conclusions; to interpret a variety of technical instructions in written, mathematical or diagrammatic form; to make independent judgments in absence of supervision; to acquire knowledge of topics related to primary occupation. Utilizes hand-held manual, air and gas-powered tools and equipment in the performance of duties (i.e., pipe wrenches, pipe cutters, saws, cement mixers, air compressors, tapping machines, pipe threaders).