(a) Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources.
(1) There shall be no discharge of process wastewater pollutants from metal preparation operations.
(2) The discharge of process wastewater pollutants from all porcelain enameling coating operations shall not exceed the values set forth below:
Subpart B--PSES------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
Milligrams per liter (mg/
l)
-------------------------Chromium...................................... 0.42 0.17Lead.......................................... 0.15 0.13Nickel........................................ 1.41 1.00Zinc.......................................... 1.33 0.56------------------------------------------------------------------------
(b) In cases when POTW find it necessary to impose mass pretreatment standards the following equivalent mass standards are provided.
(1) There shall be no discharge of process wastewater pollutants from metal preparation operations.
(2) The discharge of process watewater pollutants from all porcelain enameling costing operations shall not exceed the values set forth below:
Subpart B--PSES------------------------------------------------------------------------
Maximum for any Maximum for
1 day monthly average
Pollutant or pollutant property -----------------------------------
------------------------------------------------------------------------
Metric units--mg/m \2\ (English
Units--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)------------------------------------------------------------------------ [47 FR 53184, Nov. 24, 1982, as amended at 50 FR 36544, Sept. 6, 1985]