Section NR 106.31 - Definitions(1) "Acute criterion" or "ATC" has the meaning in s. NR 105.03(2)(2) "Chronic criterion" or "CTC" has the meaning in s. NR 105.03(15)(3) "Early life stages" or "ELS" means the life stages of fish that include the pre-hatch embryonic period, post-hatch free embryo or yolk-sac fry, and the larval period, during which the fish feeds. Juvenile fish, which are anatomically similar to adults, are not considered an early life stage. The duration of the early life stage extends from the beginning of spawning through the end of the larval period.(4) "Early life stages absent" means the early life stages of fish are not present in a water body affected by a permittee's discharge.(5) "Early life stages present" means the early life stages of fish are present in a water body affected by a permittee's discharge.(6) "Lagoon system" means a wastewater treatment system where the method of treatment consists of intermediate-depth basins with typical detention times of 30 to 60 days and generally a continuous discharge. Sufficient aeration is provided to help satisfy oxygen demand, but not provide for complete mixing.(7) "Real-time" means an event that is occurring during a present point in time.(8) "Stabilization pond" means a wastewater treatment system consisting of large shallow earthen basins that use algae and aerobic, facultative, and anaerobic organisms for wastewater treatment. Stabilization ponds include, but are not limited to, those sized for a minimum of 150 days storage and have discharges in the spring and fall.(9) "WPDES" or "WPDES permit" means Wisconsin pollutant discharge elimination system permit under ch. 283, Stats.Wis. Admin. Code Department of Natural Resources NR 106.31
CR 03-050: cr. Register February 2004 No. 578, eff. 3-1-04.