[Code of Federal Regulations]
[Title 40, Volume 27]
[Revised as ofJuly 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR466.21]

[Page 611]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 466--PORCELAIN ENAMELING POINT SOURCE CATEGORY--Table of Contents
 
             Subpart B--Cast Iron Basis Material Subcategory
 
Sec. 466.21  Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology 
          currently available.

    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 practicable control technology currently 
available.
    (a) There shall be no discharge of process wastewater pollutants 
from metal preparation operations.
    (b) The discharge of process wasterwater pollutants from all 
porcelain enameling coating operations shall not exceed the values set 
forth below:

                   Subpart B--BPT Effluent Limitations
------------------------------------------------------------------------
                                       Maximum for any     Maximum for
                                            1 day        monthly average
   Pollutant or pollutant Property   -----------------------------------

------------------------------------------------------------------------
                                        Mg/m\2\ (pounds per/1million ft
                                              \2\) of Area Coated
                                     ----------
Chromium............................     0.29   (0.06)     0.12  (0.024)
Lead................................     0.11   (0.02)     0.09   (0.02)
Nickle..............................     0.98   (0.02)      0.7   (0.15)
Zinc................................     0.93   (0.19)     0.39   (0.08)
Aluminum............................     3.16   (0.65)     1.29   (0.27)
Iron................................     0.86   (0.18)     0.44   (0.09)
Oil and grease......................    13.86   (2.84)     8.32   (1.71)
TSS.................................    28.42   (5.82)    13.86   (2.84)
pH..................................    (\1\)    (\1\)    (\1\)    (\1\)
------------------------------------------------------------------------
\1\ Within the range 7.5 to 10.0 at all times.