[Code of Federal Regulations] [Title 40, Volume 29] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR437.21] [Page 367] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 437_THE CENTRALIZED WASTE TREATMENT POINT SOURCE CATEGORY --Table of Contents Subpart B_Oils Treatment and Recovery Sec. 437.21 Effluent limitations attainable by the application of the best practicable control technology currently available (BPT). Except as provided in 40 CFR 125.30 through 125.32 or 437.20(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT: BPT Limitations ------------------------------------------------------------------------ Maximum Regulated parameter Maximum monthly avg. daily \1\ \1\ ------------------------------------------------------------------------ Conventional Parameters ------------------------------------------------------------------------ O&G......................................... 127 38.0 pH.......................................... (\2\) (\2\) TSS......................................... 74.1 30.6 ------------------------------------------------------------------------ Metal Parameters ------------------------------------------------------------------------ Arsenic..................................... 2.95 1.33 Cadmium..................................... 0.0172 0.0102 Chromium.................................... 0.746 0.323 Cobalt...................................... 56.4 18.8 Copper...................................... 0.500 0.242 Lead........................................ 0.350 0.160 Mercury..................................... 0.0172 0.00647 Tin......................................... 0.335 0.165 Zinc........................................ 8.26 4.50 ------------------------------------------------------------------------ Organic Parameters ------------------------------------------------------------------------ Bis(2-ethylhexyl) phthalate................. 0.215 0.101 Butylbenzyl phthalate....................... 0.188 0.0887 Carbazole................................... 0.598 0.276 n-Decane.................................... 0.948 0.437 Fluoranthene................................ 0.0537 0.0268 n-Octadecane................................ 0.589 0.302 ------------------------------------------------------------------------ \1\ mg/L (ppm). \2\ Within the range 6 to 9. [65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003]