A toxic substance
and critical pollutant that is a by-product of high temperature
industrial processes involving chlorine. Like dioxin,
OCS is not produced intentionally. Release to the environment occurs in effluent
from chlorine and gas production, aluminum smelting, and other metal production.
OCS has been found in leachate from industrial landfills
and fly ash from waste incinerators. Related Programs - Binational
Refers to an unproductive,
nutrient poor lake that typically has very clear water.
Lake Superior is classified as an ultra-oligotrophic lake.
Ontario Federation of Anglers and Hunters OFAH
An Ontario conservation organization that promotes sustainable use of natural
resources by providing boater education programs on exotic
species, fish, wildlife, forestry research and management, and timber management
Ontario Ministry of Natural Resources OMNR
This provincial agency is responsible for management of Canadian
waters of the Great Lakes to help sustain a healthy ecosystem.
Responsibilities of the OMNR include coordinating resource planning with other
entities, protecting and enhancing biological resources, managing fish harvest,
protecting and rehabilitating habitat and fish communities, enforcing legislation,
increasing public awareness of exotic species through
educational programming, and monitoring ecosystem health through assessment and
Ordinary High Water Mark OHW
The elevation marking the highest water level which has been maintained for a
sufficient time to leave evidence upon the landscape. Defined in Minnesota statutes
as the boundary of protected waters. Generally, it is the point where the natural
vegetation changes from predominately aquatic to upland species. For streams,
the OHW is generally the top of the bank of the channel. The OHW is the elevation
from which building and sewage setbacks are measured. OHWL means ordinary high
Nearly all of
the millions of compounds that contain carbon atoms are organic chemicals. More
than 90% of all known compounds are organic. The few carbon compounds that are
not considered organic include carbon dioxide and bicarbonate. Hydrocarbons
like methane are simple organic chemicals that contain only hydrogen and carbon.
Other organic chemicals include most pesticides and chemicals based on benzene.
The location or structure where wastewater
or drainage empties into the surface water from a sewer,
drain, or other conduit.
Outstanding International Resource
This proposed designation by the Binational
Program and the Great Lakes Initiative would protect
the entire Lake Superior Basin from new or expanded point
source discharges of persistent toxic substances.
Outstanding National Resource Waters ONRW
This proposed designation contained in the Clean Water Act Reauthorization would
establish special areas within the U.S. portion of the Lake Superior basin where
new or expanded point source discharges of persistent toxic substances would be
prohibited as part of the Binational Program and Great
Lakes Initiative. See also MN Rule Chapter 7050.
Related Programs - Clean Water Act
Resource Value Waters ORVW
the State of Minnesota with high water quality, wilderness characteristics,
unique scientific or ecological significance, exceptional recreation value or
other special qualities which warrant stringent protection from pollution. See
MN Rule Chapter 7050.
A pollutant formed in the lower atmosphere by the reaction
of nitrogen oxides and hydrocarbons
in sunlight, commonly called smog, for which National Ambient
Air Quality Standards have been established. Ozone is also found naturally
in the upper atmosphere where it acts as a protective filter, screening out ultra-violet