[Code of Federal Regulations]
[Title 40, Volume 5]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR58.2]

[Page 208-209]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 58--AMBIENT AIR QUALITY SURVEILLANCE--Table of Contents
 
                      Subpart A--General Provisions
 
Sec. 58.2  Purpose.

    (a) This part contains criteria and requirements for ambient air 
quality monitoring and requirements for reporting ambient air quality 
data and information. The monitoring criteria pertain to the following 
areas:
    (1) Quality assurance procedures for monitor operation and data 
handling.
    (2) Methodology used in monitoring stations.
    (3) Operating schedule.
    (4) Siting parameters for instruments or instrument probes.
    (b) The requirements pertaining to provisions for an air quality 
surveillance system in the State Implementation Plan are contained in 
this part.
    (c) This part also acts to establish a national ambient air quality 
monitoring network for the purpose of providing timely air quality data 
upon which to base national assessments and policy decisions. This 
network will be operated by the States and will consist of certain 
selected stations from the States' SLAMS networks. These selected 
stations will remain as SLAMS

[[Page 209]]

and will continue to meet any applicable requirements on SLAMS. The 
stations, however, will also be designated as National Air Monitoring 
Stations (NAMS) and will be subject to additional data reporting and 
monitoring methodology requirements as contained in subpart D of this 
part.
    (d) This section also acts to establish a Photochemical Assessment 
Monitoring Stations (PAMS) network as a subset of the State's SLAMS 
network for the purpose of enhanced monitoring in O3 
nonattainment areas listed as serious, severe, or extreme. The PAMS 
network will be subject to the data reporting and monitoring methodology 
requirements as contained in subpart E of this part.
    (e) Requirements for the daily reporting of an index of ambient air 
quality, to insure that the population of major urban areas are informed 
daily of local air quality conditions, are also included in this part.

[44 FR 27571, May 10, 1979, as amended at 58 FR 8467, Feb. 12, 1993]