[Code of Federal Regulations] [Title 40, Volume 28] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR420.07] [Page 393] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 420_IRON AND STEEL MANUFACTURING POINT SOURCE CATEGORY--Table of Contents Sec. 420.07 Effluent limitations guidelines and standards for pH. (a) The pH level in process wastewaters subject to a subpart within this part shall be within the range of 6.0 to 9.0. (b) The pH level shall be monitored at the point of discharge to the receiving water or at the point at which the wastewater leaves the wastewater treatment facility operated to treat effluent subject to that subpart. [67 FR 64261, Oct. 17, 2002]