Acute standard definition
Acute standard means the one-hour average concentration does not exceed the listed concentration more than once every three years.
Acute standard means the level not to be exceeded by the concentration for either a single sample or calculated as an average of all samples collected during a one-day period, except for temperature, which shall be based on the DM (see DM definition). As used in tables II and III, acute represents one-half of the LC-50 that protects 95 percent of the genera in a waterbody from lethal effects. The acute standard is implemented in combination with a selected duration and frequency of recurrence (section 31.9(1)). In determining attainment of the applicable acute standard, the representative nature of the data must be considered.
Acute standard means the level not to be exceeded by the concentration in a single sample or calculated as an average of all samples collected during a one-day period. As used in tables II and III, acute represents one-half of the 96-hour LC-50 that protects 95 percent of the genera in a water body from lethal effects. The acute standard is implemented in combination with a selected duration and frequency of recurrence (section 31.9(1)).
More Definitions of Acute standard
Acute standard means a standard that applies to any single sample; acute standards shall not be exceeded at any time.
Acute standard means the water quality standard that is intended to protect a beneficial use over a short exposure period. This period is usually measured as an instantaneous or one hour average.