1. LawStack
  2. Title 40 - Protection of Environment
  3. Chapter I - ENVIRONMENTAL PROTECTION AGENCY
  4. Subchapter C - AIR PROGRAMS
  5. Part 53 - AMBIENT AIR MONITORING REFERENCE AND EQUIVALENT METHODS
  6. Subpart E - Procedures for Testing Physical (Design) and Performance Characteristics of Reference Methods and Class I and Class II Equivalent Methods for PM2.5 or PM10-2.5
  7. 40 CFR Table E-2 to Subpart E of Part 53
40 CFR Table E-2 to Subpart E of Part 53
Spectral Energy Distribution and Permitted Tolerance for Conducting Radiative Tests
June 9, 2020
CFR
Open Table
Characteristic Spectral Region
Ultraviolet Visible Infrared
Bandwidth (µm) 0.28 to 0.32         0.32 to 0.40 0.40 to 0.78 0.78 to 3.00
Irradiance (W/m2) 5                              56 450 to 550 439
Allowed Tolerance ±35%                     ±25% ±10% ±10%

[62 FR 38799, July 18, 1997; 63 FR 7714, Feb. 17, 1998]

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Table E-1 to Subpart E of Part 53 Summary of Test Requirements for Reference and Class I Equivalent Methods for PM2.5 and PM10-2.5
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Figure E-1 Figure E-1 to Subpart E of Part 53—Designation Testing Checklist

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