| (a) Wastewater treatment systems other than oxidation
ponds systems.
(1) By January 1, 1993, all domestic wastewater discharges
from wastewater treatment systems other than oxidation pond systems
shall meet the following effluent limits:
Attached Graphic
(2) By January 1, 1993, all wastewater treatment systems
other than oxidation pond systems shall employ filtration to supplement
suspended solids removal.
(3) Domestic wastewater discharged from wastewater
treatment systems other than oxidation pond systems shall be disinfected
prior to discharge in a manner to protect public health and aquatic
life. Any appropriate process may be considered and approved on a
case-by-case basis. If chlorine is utilized as the disinfectant,
the effluent shall have a minimum concentration of 1 mg/liter chlorine
after a 20 minute detention time. The maximum chlorine residual in
any discharge shall in no event be greater than four mg/liter, or
that necessary to protect aquatic life.
(b) Oxidation pond systems.
(1) All domestic wastewater from oxidation pond systems
shall meet the following effluent limits:
Attached Graphic
(2) Unless otherwise specified in a permit, chemical
disinfection is not required for oxidation pond systems when the total
retention time in the wastewater treatment system (based upon design
flow) is at least 21 days.
|
