Chemical Etching and Milling

Section 307 Section 307.2306  Chemical Etching and Milling a)         Applicability.  This Section applies to discharges resulting from the chemical milling or etching of ferrous or nonferrous materials. b)         Specialized Definitions.  The Board incorporates by reference 40 CFR 413.61 (2003).  This incorporation includes no later amendments or editions. c)         Existing Sources 1)         The Board incorporates by reference 40 CFR 413.64 (2003).  This incorporation includes no later amendments or editions. 2)         No person subject to the pretreatment standards incorporated by reference in subsection (c)(1) may cause, threaten, or allow the discharge of any contaminant to a POTW in violation of those standards. d)         Sources whose construction commenced after August 31, 1982 are subject to Subpart BH.