Unlike other cancers, the vast majority of skin cancers have no potential to spread to other parts of the body (metastasize) and become life-threatening. There are two major types of skin cancer: basal cell carcinoma (the most common) and squamous cell carcinoma (the second most common). Melanoma is also a form of skin cancer but is far less common, though more dangerous, than the other two varieties.
OSHA defines an excavation as any man-made cut, cavity, trench, or depression in the earth's surface formed by earth removal. This can include excavations for anything from cellars to highways. A trench is defined as a narrow underground excavation that is deeper than it is wide, and no wider than 15 feet (4.5 meters).
Full Definition of LANDFILL. 1. : an area built up by landfill. 2. : a system of trash and garbage disposal in which the waste is buried between layers of earth to build up low-lying land âcalled also sanitary landfill.â landfill transitive verb. See landfill defined for English-language learners.. : a system of trash and garbage disposal in which the waste is buried between layers of earth to build up low-lying land âcalled also sanitary landfill.