(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.
Subpart A--PSES------------------------------------------------------------------------
Maximum for Maximum for
any 1 day monthly
Pollutant or pollutant property ------------- 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 where POTW find it necessary to impose mass effluent pretreatment standards the following equivalent mass standards are provided:
Subpart A--PSES----------------------------------------------------------------------------------------------------------------
Maximum for any 1 day Maximum for monthly
------------------------ average
Pollutant or pollutant property -----------------------
Metal Coating Metal Coating
preparation operation preparation operation----------------------------------------------------------------------------------------------------------------
Metric units--mg/m \2\ of area processed or
coated
-----------------------------------------------Chromium........................................................ 16.82 0.53 6.81 0.22Lead............................................................ 6.01 0.19 5.21 0.16Nickel.......................................................... 56.5 1.78 40.1 1.26Zinc............................................................ 53.3 1.68 22.5 0.71
-----------------------------------------------
English units--lbs/1 million ft \2\ of area
processed or coated
-----------------------------------------------Chromium........................................................ 3.45 0.11 1.4 0.05Lead............................................................ 1.23 0.04 1.07 0.03Nickel.......................................................... 11.6 0.37 8.20 0.26Zinc............................................................ 10.9 0.35 4.6 0.15---------------------------------------------------------------------------------------------------------------- [47 FR 53184, Nov. 24, 1982, as amended at 50 FR 36543, Sept. 6, 1985]