The theoretical calculated time required for a small amount of water to pass through a tank at a given rate of flow. The actual time that a small amount of water is in a settling basin, flocculating basin, or rapid-mix chamber. In storage reservoirs, the length of time water will be held before being used. Removal of sulfur from fossil fuels to reduce pollution. A predetermined rule to ascertain whether a tank is leaking or not.
Most volumetric tests use a threshold value as the detection criterion.
Some contain compounds which kill useful bacteria and encourage algae growth when they are in wastewater that reaches receiving waters. Adverse effects such as altered growth, structural abnormality, functional deficiency, or death observed in a developing organism. Remove or separate a portion of the water in a sludge or slurry to dry the sludge so it can be handled and disposed. Remove or drain the water from a tank or trench. In 1986, EPA banned its use on open areas such as sod farms and golf courses because it posed a danger to migratory birds.