Wis. Admin. Code Department of Natural Resources NR 276.07 - Discharges from impoundments
(1) A process
wastewater impoundment which is designed, constructed and operated so as to
contain the precipitation from the 10 year, 24 hour rainfall event for the area
in which such impoundment is located may discharge that volume of process
wastewater which is equivalent to the volume of precipitation that falls within
the impoundment in excess of that attributable to such rainfall event when it
occurs.
(2) A process wastewater
impoundment which is designed, constructed and operated so as to contain the
precipitation from the 25 year, 24 hour rainfall event for the area in which
such impoundment is located may discharge that volume of process wastewater
which is equivalent to the volume of precipitation that falls within the
impoundment in excess of that attributable to such rainfall event when it
occurs.
(3) During any calendar
month, there may be discharged from a process wastewater impoundment a volume
of process wastewater equal to the difference between the precipitation for
that month which falls within the impoundment and the evaporation from the pond
water surface area for that month. Such discharges shall have a pH within the
range of 6.0-9.0, daily average concentrations not to exceed 35, 10, and 25
mg/1 respectively of total phosphorus, fluoride, and suspended solids, and
daily maximum concentrations not to exceed 70, 30, and 50 mg/1
respectively.
(4) The 10 year and
25 year, 24 hour rainfall events for the impoundment location shall be as set
forth in s.
NR 205.05.
Notes
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