Well-logging means all operations involving the lowering and raising of measuring devices or tools that may contain sources of radiation into well-bores or cavities for the purpose of obtaining information about the well or adjacent formations.
waste water means used water containing substances or objects that is subject to regulation by national law.
Diatomaceous earth filtration means a process resulting in substantial particulate removal in which a precoat cake of diatomaceous earth filter media is deposited on a support membrane (septum), and while the water is filtered by passing through the cake on the septum, additional filter media known as body feed is continuously added to the feed water to maintain the permeability of the filter cake.
Cider means any alcoholic beverage obtained by the
Aquatic plant means a plant, including the roots, which typically floats on water or requires water for its entire structural support, or which will desiccate outside of water.