[Code of Federal Regulations] [Title 40, Volume 27] [Revised as ofJuly 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR440.72] [Page 424-425] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 440--ORE MINING AND DRESSING POINT SOURCE CATEGORY--Table of Contents Subpart G--Nickel Ore Subcategory Sec. 440.72 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 subpart L of this part and 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 [[Page 425]] the best practicable control technology currently available (BPT): (a) The concentration of pollutants discharged in mine drainage from mines producing 5000 metric tons (5512 short tons) or more of nickel bearing ores per year shall not exceed: ------------------------------------------------------------------------ Effluent limitations --------------------------- Average of Effluent characteristic daily values Maximum for for 30 any 1 day consecutive days ------------------------------------------------------------------------ Milligrams per liter --------------- TSS......................................... 30 20 Cd.......................................... .10 .05 Cu.......................................... .3 .15 Zn.......................................... 1.0 .5 Pb.......................................... .6 .3 As.......................................... 1.0 .5 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range 6.0 to 9.0. (b) The concentration of pollutants discharged in mine drainage from mines producing less than 5,000 metric tons (5,512 short tons) or discharged from mills processing less than 5,000 metric tons (5,512 short tons) of nickel ores per year by methods other than ore leaching shall not exceed: ------------------------------------------------------------------------ Effluent limitations ------------------------- Average of daily Effluent characteristic Maximum for values for any 1 day 30 consecutive days ------------------------------------------------------------------------ Milligrams per liter -------------- TSS........................................... 50 30 pH............................................ (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range 6.0 to 9.0. (c) The concentration of pollutants discharged from mills processing 5,000 metric tons (5,512 short tons) or more of nickel ores per year by purely physical methods including ore crushing, washing, jigging, heavy media separation and magnetic and electrostatic separation shall not exceed: ------------------------------------------------------------------------ Effluent limitations --------------------------- Average of Effluent characteristic daily values Maximum for for 30 any 1 day consecutive days ------------------------------------------------------------------------ Milligrams per liter --------------- TSS......................................... 30 20 Cd.......................................... .10 .05 Cu.......................................... .30 .15 Zn.......................................... 1.0 .5 As.......................................... 1.0 .5 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range 6.0 to 9.0 (d) The concentration of pollutants discharged from mills processing 5,000 metric tons (5,512 short tons) or more of nickel ore per year by froth flotation methods shall not exceed: ------------------------------------------------------------------------ Effluent limitations --------------------------- Average of Effluent characteristic daily values Maximum for for 30 any 1 day consecutive days ------------------------------------------------------------------------ Milligrams per liter --------------- TSS......................................... 30 20 Cd.......................................... .10 .05 Cu.......................................... .30 .15 Zn.......................................... 1.0 .5 As.......................................... 1.0 .5 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range 6.0 to 9.0.