Drip pad
Drip pad is an engineered structure consisting of a curbed, free-draining base, constructed of non-earthen materials and designed to convey preservative kick-back or drippage from treated wood, precipitation, and surface water run-on to an associated collection system at wood preserving plants.
Source
40 CFR § 260.10
Scoping language
When used in parts 260 through 273 of this chapter, the following terms have the meanings given below: