achievable.
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 available technology economically achievable.
(a) There shall be no discharge of process wastewater pollutants from metal preparation operations.
(b) The discharge of process wastewater pollutants from all porcelain enameling coating operations shall not exceed the values set forth below:
Subpart B--BAT Effluent Limitations------------------------------------------------------------------------
Maximum for any Maximum for
1 day monthly average
Pollutant or pollutant property -----------------------------------
------------------------------------------------------------------------
Mg/m\2\ (pounds per/million ft\2\)
of area coated
-----------------------------------Chromium............................ 0.53 (0.11) 0.22 (0.05)Lead................................ 0.19 (0.04) 0.16 (0.03)Nickel.............................. 1.78 (0.37) 1.26 (0.26)Zinc................................ 1.68 (0.35) 0.71 (0.15)Aluminum............................ 5.74 (1.18) 2.35 (0.48)Iron................................ 1.55 (0.32) 0.79 (0.16)------------------------------------------------------------------------ [47 FR 53184, Nov. 24, 1982, as amended at 50 FR 36543, Sept. 6, 1985]