Section NR 274.011 - Specialized definitionsThe following definitions apply to the terms used in this subchapter:
(1) "Bauxite" means ore which contains alumina monohydrate or alumina trihydrate and which serves as the principal raw material for the production of alumina by the Bayer process or by the combination process.(2) "Within the impoundment", for purposes of calculating the volume of process wastewater which may be discharged, means the surface area within the impoundment at the maximum capacity plus the area of the inside and outside slopes of the impoundment dam and the surface area between the outside edge of the impoundment dam and seepage ditches upon which rain falls and is returned to the impoundment, but the surface area allowance for external appurtenances to the impoundment shall not be more than 30% of the water surface area within the impoundment dam at maximum capacity.(3) "Pond water surface area", for the purpose of calculating the volume of wastewater, means the area within the impoundment for rainfall and the actual water surface area for evaporation.Wis. Admin. Code Department of Natural Resources § NR 274.011
Cr. Register, March, 1991, No. 423, eff. 4-1-91.