Strenuous walking, standing, and/or climbing; heavy lifting up to 50 pounds; inside and outside exposure to hot and cold temperatures, dust, toxic chemicals and materials; slippery or uneven walking surfaces, work on ladders and lifts. Including but not limited to hand truck, dolly, buffer, floor scrubber, wet/dry vacuum cleaner, carpet extractor, hand tools, and other small electrical tools, use of cell phone, computer, and tablet.