CFR / Title 40 / Part 421 / Sec. 421.35 Pretreatment standards for existing sources.

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. The mass of wastewater pollutants in secondary aluminum process wastewater introduced into a POTW shall not exceed the following values:

(a) Subpart C--Scrap Drying Wet Air Pollution Control.

PSES------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pounds per

million pounds) of

aluminum scrap dried

--------------Lead.......................................... .000 .000Zinc.......................................... .000 .000Ammonia (as N)................................ .000 .000------------------------------------------------------------------------

(b) Subpart C--Scrap Screening and Milling.

PSES------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pounds per

million pounds) of

aluminum scrap screened

and milled

(c) Subpart C--Dross Washing.

PSES------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pounds per

million pounds) of dross

washed

--------------Lead.......................................... 3.043 1.413Zinc.......................................... 11.090 4.565Ammonia (as N)................................ 1,449.000 636.000------------------------------------------------------------------------

(d) Subpart C--Demagging Wet Air Pollution Control.

PSES------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (lb/million lbs)

of aluminum demagged

--------------Lead.......................................... 0.216 0.100Zinc.......................................... 0.786 0.324Amomonia (as N)............................... 102.800 45.180------------------------------------------------------------------------

(e) Subpart C--Delacquering Wet Air Pollution Control.

PSES------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pounds per

million pounds) of

aluminum delacquered

--------------Lead.......................................... 0.093 0.043Zinc.......................................... 0.340 0.140Ammonia (as N)................................ 44.389 19.514Total phenolics (4-AAP) method) \1\........... 0.004 ...........------------------------------------------------------------------------\1\ At the source.

(f) Subpart C--Direct Chill Casting Contact Cooling.

PSES------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pounds per

million pounds) of

aluminum cast

--------------Lead.......................................... .372 .173Zinc.......................................... 1.356 .558Ammonia (as N)................................ 177.200 77.800------------------------------------------------------------------------

(g) Subpart C--Ingot Conveyor Casting Contact Cooling (When Chlorine Demagging Wet Air Pollution Control is Not Practiced On-Site).

PSES------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (lb/million lbs)

of aluminum cast

--------------Lead.......................................... 0.019 0.009Zinc.......................................... 0.068 0.028Amomonia (as N)............................... 8.931 3.926------------------------------------------------------------------------

(h) Subpart C--Ingot Conveyor Casting Contact Cooling. (When Chlorine Demagging Wet Air Pollution Control is Practiced On Site.)

PSES------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pounds per

million pounds) of

aluminum cast

(i) Subpart C--Stationary Casting Contact Cooling.

PSES------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pounds per

million pounds) of

aluminum cast

(j) Subpart C--Shot Casting Contact Cooling.

PSES------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pounds per

million pounds) of

aluminum cast