The concentration is calculated on the volume of water that is in the well. The concentration must be at least 200 milligrams of chlorine per litre of water present in the well and must be left in the well for at least 12 hours to ensure any bacteria present are.
idles; idled; idling. Learner's definition of IDLE. 1. of an engine or vehicle: to run without being connected for doing useful work. [no object]. She left the engine idling for a few seconds before she turned it off. The cars idled in traffic.
> the very common 3.8 GM engine for instance. > they never say how much you are burning. you let it idle after it had warmed up. the old choke) to keep the engine running. driving while it is using that fuel you do two things. working harder so it warms up faster.