Current through Register Vol. 63, No. 3, March 1, 2024
(1) pH (Hydrogen
ion concentration) pH values may not fall outside the following ranges:
(a) Estuarine and fresh waters: 6.5-8.5.
(b) Marine waters: 7.0-8.5.
(2) Total Dissolved
Solids. Guide concentrations listed below may not be exceeded unless otherwise
specifically authorized by DEQ upon such conditions as it may deem necessary to
carry out the general intent of this plan and to protect the beneficial uses
set forth in OAR 340-04l-0300: 100.0 mg/l.
(3) Minimum Design Criteria for Treatment and
Control of Sewage Wastes:
(a) During periods
of low stream flows (approximately May 1 to October 31): Treatment resulting in
monthly average effluent concentrations may not exceed 20 mg/l of BOD and 20
mg/l of SS or equivalent control;
(b) During the period of high stream flows
(approximately November 1 to April 30) and for direct ocean discharges: A
minimum of secondary treatment or equivalent control and unless otherwise
specifically authorized by the Department, operation of all waste treatment and
control facilities at maximum practicable efficiency and effectiveness so as to
minimize waste discharges to public waters.
(4) Outstanding Resource Waters of Oregon
(ORWs)
(a) The North Fork Smith River and its
tributaries and associated wetlands. These streams include but are not limited
to the North Fork Smith River, Chrome Creek, Spokane Creek, Fall Creek, Cedar
Creek, Horse Creek, Packsaddle Creek, Baldface Creek, Taylor Creek, Biscuit
Creek, Wimer Creek, McGee Creek, Cabin Creek, Diamond Creek, and the North Fork
Diamond Creek.
(b) The current
high water quality, exceptional ecological values, and existing and designated
uses of the ORWs identified in this rule ("these waters") must be maintained
and protected except as altered by natural causes.
(c) No new NPDES discharge or expansion of an
existing discharge to these waters may be allowed.
(d) No new NPDES discharge or expansion of an
existing discharge to waters upstream of or tributary to these waters may be
allowed if such discharge would degrade the water quality within these waters.
(e) No activities may be allowed
that would degrade the existing water quality and ecological characteristics
and values of these waters.
Stat. Auth.: ORS
468.020,
468B.030,
468B.035 & 468B.048
Stats. Implemented: ORS
468B.030,
468B.035 &
468B.048
