[Code of Federal Regulations]
[Title 40, Volume 26]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR421.3]

[Page 461]
 
                TITLE 40-PROTECTION OF ENVIRONMENT
 
      CHAPTER I-ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 421-NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY--Table of Contents
 
Sec. 421.3  Monitoring and reporting requirements.

    The following special monitoring requirements apply to all 
facilities controlled by this regulation:
    (a) The monthly average regulatory values shall be the basis for the 
monthly average discharge in direct discharge permits and for 
pretreatment standards. Compliance with the monthly discharge limit is 
required regardless of the number of samples analyzed and averaged.
    (b) Periodic analysis for cyanide are not required for a facility in 
the primary beryllium subcategory (subpart O of this part) when both of 
the following conditions are met:
    (1) The first wastewater sample taken in each calandar year has been 
analyzed and found to contain less than 0.07 mg/1 cyanide.
    (2) The owner or operator of the primary beryllium manufacturing 
facility certifies in writing to the POTW authority or permit issuing 
authority that cyanide is neither generated nor used in the beryllium 
manufacturing process employed at that facility.

[49 FR 8790, Mar. 8, 1984, as amended at 55 FR 31697, Aug. 3, 1990]