Applicability

Applicability. (1) Except as provided in subs. (2) and (3) , the provisions of this chapter apply to any porcelain enameling facility which discharges pollutants to waters of the state or introduces pollutants into a publicly owned treatment works. (2) Any existing porcelain enameling facility which prepares or coats less than 1600 m 2 /day and which introduces less than 60,000 l/day of wastewater into a publicly owned treatment works is not controlled by the pretreatment standards for existing sources established by this rule. Such facilities shall comply with the provisions of 40 CFR Part 403 . (3) This chapter does not apply to the porcelain enameling on precious metal basis material. (4) When wastewaters from coating cast iron are co-treated with wastewaters from coating steel, the limitations for coating steel contained in s. NR 262.11 may be applied to the entire wastestream.