title: Providing a solid foundation.
authors: Massachusetts Water Resources Authority, Boston, MA, USA.
authors: George
authors: G
authors: Denhard
mesh_terms: D000062:Accidents, Occupational / Q000517:prevention & control*; D020378:Confined Spaces; D004784:Environmental Monitoring; D006801:Humans; D012121:Respiration, Artificial; D014481:United States; D014489:United States Occupational Safety and Health Administration