Applicability.

(a) This subpart applies to process wastewater directly discharged from facilities specified at § 438.1. (b) This subpart applies to process wastewater discharges from oily operations (as defined at § 438.2(f) and appendix B of this part). (c) This subpart does not apply to process wastewater discharges from metal-bearing operations (as defined at § 438.2(d) and appendix C of this part).