What does the acronym “ThOD" represent?
The amount of oxygen required to fully oxidize substances in water as determined by a laboratory test where the sample is digested with an oxidizing chemical at elevated temperatures.
None of these
The amount of oxygen required to fully oxidize biodegradable substances in water over a specified amount of time (e.g., 5 days) as determined by a laboratory test where the sample is degraded by aerobic microorganisms.
The amount of oxygen required to fully oxidize substances in water as determined by calculation.