40 CFR § 413.51 - Specialized definitions.
For the purpose of this subpart;
(a) The term sq m (“sq ft”) shall mean the area processed expressed in square meters (square feet).
(b) The term operation shall mean any step in the coating process in which a basis material surface is acted upon by a process solution and which is followed by a rinse; plus the related operations of alkaline cleaning, acid pickle, and sealing, when each operation is followed by a rinse.
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