[Code of Federal Regulations] [Title 40, Volume 27] [Revised as ofJuly 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR425.21] [Page 10] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 425--LEATHER TANNING AND FINISHING POINT SOURCE CATEGORY--Table of Contents Subpart B--Hair Save, Chrome Tan, Retan-Wet Finish Subcategory Sec. 425.21 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT). Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): ------------------------------------------------------------------------ BPT limitations --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ Kg/kkg (or pound per 1,000 lb) of raw material --------------- BOD5........................................ 8.2 3.7 TSS......................................... 11.8 5.4 Oil and grease.............................. 3.4 1.5 Total chromium.............................. 0.21 0.08 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range 6.0 to 9.0. [[Page 11]]