Mine drainage means any drainage, and any water pumped or siphoned, from an active mining area or a post-mining area. The abbreviation “ml/l” means milliliters per liter.
Open dump means a site on which any solid waste is placed, discharged, deposited, injected,
Sludge dryer means any enclosed thermal treatment device that is used to dehydrate sludge and that has a maximum total thermal input, excluding the heating value of the sludge itself, of 2,500 Btu/lb of sludge treated on a wet-weight basis.
Open session means a meeting which is held in a place reasonably accessible to members of the public and open to all cit- izens at all times. In the case of a state governmental body, it means a meeting which is held in a building and room thereof which enables access by persons with functional limitations, as defined in s. 101.13 (1).
Open burning means the combustion of any material without the following characteristics: