[Code of Federal Regulations]
[Title 40, Volume 8]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR61.184]

[Page 143]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 61_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS
--Table of Contents
 
  Subpart P_National Emission Standard for Inorganic Arsenic Emissions 
    From Arsenic Trioxide and Metallic Arsenic Production Facilities
 
Sec. 61.184  Ambient air monitoring for inorganic arsenic.

    (a) The owner or operator of each source to which this subpart 
applies shall operate a continuous monitoring system for the measurement 
of inorganic arsenic concentrations in the ambient air.
    (b) The ambient air monitors shall be located at sites to detect 
maximum concentrations of inorganic arsenic in the ambient air in 
accordance with a plan approved by the Administrator that shall include 
the sampling and analytical method used.
    (c) The owner or operator shall submit a written plan describing, 
and explaining the basis for, the design and adequacy of the monitoring 
network, sampling and analytical procedures, and quality assurance 
within 45 days after the effective date of this subpart.
    (d) Each monitor shall be operated continuously except for a 
reasonable time allowance for instrument maintenance and calibration, 
for changing filters, or for replacement of equipment needing major 
repair.
    (e) Filters shall be changed daily and shall be analyzed and 
concentrations calculated within 30 days after filters are collected.
    (f) The Administrator at any time may require changes in, or 
expansion of, the sampling program, including sampling and analytical 
protocols and network design.