What is required for concrete trucks washing their chutes on the street?

When they wash the chute, a bucket must be attached to capture all the water running off the chute. Some small overspray may occur and is considered acceptable. It is impossible to fully prevent overspray and small amounts will not impact the creek water quality. Trucks are not permitted to wash their vehicles (other than the chute) on the roadway if there is a risk of any harmful material (notably soap) that could get into a water course. Truck drivers should be washing their vehicles at their yard. 

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