Work involves regular and recurring exposure to moderate risks and discomforts, such as the following: dust, strong odors, or fumes from fuels, chemicals, or engine exhaust; high levels of noise and vibration, dust, grease, electrical hazards, uncovered moving parts of machinery, moving machinery; or outdoor conditions involving moderate exposure to rain, cold/hot weather, icy streams, and rivers. The work requires some physical exertion, such as long periods of standing; walking over rough, uneven, rocky, or slippery surfaces; recurring bending, crouching, stooping, stretching, climbing, or similar activities; recurring lifting of light to moderately heavy items weighing less than 50 pounds (i.e., 23 kilograms), such as testing or measuring equipment; and/or regular visits to construction, industrial, marine, or other outdoor sites.