Asphalt is used extensively in roofing, waterproofing, and, above all, of course, in roadway construction. The two primary safety issues associated with asphalt products are the danger of burns, and dangers from respiratory or skin exposure to the product and its fumes.
Job-related fatalities in New York City are not constant from year to year (there were 191 such deaths in 1993, and just 56 in 2013) but, year after year, construction-related injuries and deaths run ahead of transportation deaths as the #1 and #2 causes of workplace mayhem.
A subcontractor has no direct contractual relationship with a project owner; that relationship is between the general contractor and the owner. Accordingly, the subcontractor cannot sue the owner directly if it sustains money damages caused by the owner.