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For questions about the King County CSO Control Program, please contact Karen Huber.

Wastewater Treatment Division
King Street Center
201 S. Jackson St., Suite 505
Seattle, WA 98104-3855

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Real Time CSO Notification

CSO Control Program --
Glossary of Terms

The following is a list of definitions of terms about combined sewers and more generally about wastewater treatment.

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Telemeter
To transmit to a distant receiving station by radio or other electronic means.

Toxic
Causing death, disease, behavioral abnormalities, cancer, genetic mutations, physiological malfunctions (including malfunctions in reproduction), or physical deformations in any organism or its offspring upon exposure, ingestion, inhalation, or assimilation.

Treatment
Chemical, biological, or mechanical procedures applied to industrial or municipal wastewater or to other sources of contamination to remove, reduce, or neutralize contaminants.

Trunk sewer
This is a larger pipe in which smaller branch and submain sewers are connected. It may also be called a main sewer.

Washington Administrative Code (WAC)
The codified regulations adopted by various Washington state agencies through the rule-making process.

Wastewater
Total flow within a sewerage system. In separated systems, it includes sewage and infiltration/inflow. In combined systems, it includes sewage and stormwater.

Wastewater collection system
The piping and pumping system used for the collection and conveyance of domestic, commercial, and industrial wastewater.

Water quality criteria
Standards used to protect of water for drinking, swimming, raising fish, farming or industrial use.

Water pollution
The addition of harmful or objectionable material to water in concentrations or sufficient quantities to adversely affect is usefulness or quality.

Weir
An overflow section of a pipe.

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