[Code of Federal Regulations]
[Title 40, Volume 27]
[Revised as ofJuly 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR464.02]

[Page 553-554]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 464--METAL MOLDING AND CASTING POINT SOURCE CATEGORY--Table of Contents
 
Sec. 464.02  General definitions.

    In addition to the definitions set forth in 40 CFR part 401, the 
following definitions apply to this part:
    (a) Aluminum casting. The remelting of aluminum or an aluminum alloy 
to form a cast intermediate or final product by pouring or forcing the 
molten metal into a mold, except for ingots, pigs, or other cast shapes 
related to nonferrous (primary and secondary) metals manufacturing (40 
CFR part 421) and aluminum forming (40 CFR part 467). Processing 
operations following the cooling of castings not covered under aluminum 
forming, except for grinding scrubber operations which are covered here, 
are covered under the electroplating and metal finishing point source 
categories (40 CFR parts 413 and 433).
    (b) Copper casting. The remelting of copper or a copper alloy to 
form a cast intermediate or final product by pouring or forcing the 
molten metal into a mold, except for ingots, pigs, or other cast shapes 
related to nonferrous (primary and secondary) metals manufacturing (40 
CFR part 421). Also excluded are casting of beryllium alloys in which 
beryllium is present at 0.1 or greater percent by weight and precious 
metals alloys in which the precious metal is present at 30 or greater 
percent by weight. Except for grinding scrubber operations which are 
covered here, processing operations following the cooling of castings 
are covered under the electroplating and metal finishing point source 
categories (40 CFR parts 413 and 433).
    (c) Ferrous casting. The remelting of ferrous metals to form a cast 
intermediate or finished product by pouring the molten metal into a 
mold. Except for grinding scrubber operations which are covered here, 
processing operations following the cooling of castings are covered 
under the electroplating and metal finishing point source categories (40 
CFR parts 413 and 433).
    (d) Zinc casting. The remelting of zinc or zinc alloy to form a cast 
intermediate or final product by pouring or forcing the molten metal 
into a mold, except for ingots, pigs, or other cast shapes related to 
nonferrous (primary) metals manufacturing (40 CFR part 421) and 
nonferrous metals forming (40 CFR part 471). Processing operations 
following the cooling of castings not covered under nonferrous metals 
forming are covered under the electroplating

[[Page 554]]

and metal finishing point source categories (40 CFR parts 413 and 433).
    (e) POTW shall mean ``publicly owned treatment works.''
    (f) A non-continuous discharger is a plant which does not discharge 
pollutants during specific periods of time for reasons other than 
treatment plant upset, such periods being at least 24 hours in duration. 
A typical example of a non-continuous discharger is a plant where 
wastewaters are routinely stored for periods in excess of 24 hours to be 
treated on a batch basis. For non-continuous discharging direct 
discharging plants, NPDES permit authorities shall apply the mass-based 
annual average effluent limitations or standards and the concentration-
based maximum day and maximum for monthly average effluent limitations 
or standards established in the regulations. POTWs may elect to 
establish concentration-based standards for non-continuous discharges to 
POTWs. They may do so by establishing concentration-based pretreatment 
standards equivalent to the mass-based standards provided in 
Secs. 464.15, 464.16, 464.25, 464.26, 464.35, 464.36, 464.45, and 464.46 
of the regulations. Equivalent concentration standards may be 
established by following the procedures outlined in Sec. 464.03(b).
    (g) Total phenols shall mean total phenolic compounds as measured by 
the procedure listed in 40 CFR part 136 (distillation followed by 
colorimetric--4AAP).
    (h) Sm \3\ shall mean standard cubic meters.
    (i) SCF shall means standard cubic feet.
    (j) Total toxic organics (TTO) shall mean the sum of the mass of 
each of the toxic organic compounds which are found at a concentration 
greater than 0.010 mg/l. The specialized definitions for each subpart 
contain a discrete list of toxic organic compounds comprising TTO for 
each process segment in which TTO is regulated.