[Code of Federal Regulations]
[Title 40, Volume 29]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR463.21]

[Page 548-549]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 463_PLASTICS MOLDING AND FORMING POINT SOURCE CATEGORY
--Table of Contents
 
                  Subpart B_Cleaning Water Subcategory
 
Sec. 463.21  Specialized definitions.

    For the purpose of this subpart:
    (a) The ``average process water usage flow rate'' of a cleaning 
water process in liters per day is equal to the volume of process water 
(liters) used per year by a process divided by the number of days per 
year the process operates. The ``average process water usage flow rate'' 
for a plant with more than one plastics molding and forming process that 
uses cleaning water is the sum of

[[Page 549]]

the ``average process water usage flow rates'' for the cleaning 
processes.
    (b) The ``volume of process water used per year'' is the volume of 
process water that flows through a cleaning process and comes in contact 
with the plastic product over a period of one year.