This shows the specialized terms used in EarthWise Academy. This section contains all the definitions used in the various course glossaries used by each course.
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Entries starting with: N
A central mass about which other matter collects; a starting point for growth or development.
Entries starting with: O
O&M – Operation and Maintenance
Optimal Corrosion Control Treatment - Corrosion control treatment that minimizes the lead and copper concentrations at users' taps while ensuring that the treatment does not cause the system to violate any primary maximum contaminant level.
One full year
any 12-consecutive month period of monitoring.
Optimal Corrosion Control Treatment
Optimal Corrosion Control Treatment (OCCT)
Corrosion control treatment that minimizes the lead and copper concentrations at users' taps while ensuring that the treatment does not cause the system to violate any primary maximum contaminant level.
Derived from animals and plants, or may be manufactured chemical compounds. However, all organics contain carbon. Organic contaminants can be biodegradable, which means that the contaminants can be consumed by bacteria and other microorganisms. In the process of being consumed, these organics will exert an oxygen demand (BOD) which can be measured as the Biochemical Oxygen Demand (BOD) of the wastewater. Some organic contaminants (refractory organics) are resistant to biodegradation.
Substances that come from animal or plant sources and contain carbon. Examples include wood, sugars, proteins, plastics, petroleum-based compounds, solvents and pesticides.