StacksVerified U.S. regulatory reference

40 CFR §1066.820

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Determine the mass of exhaust emissions of each pollutant for each FTP test interval as described in § 1066.605.
  2. (b)Calculate the final composite gaseous test results as a mass-weighted value, e[emission]-FTPcomp, in grams per mile using the following equation:
  3. (c)Calculate the final composite PM test results as a mass-weighted value, ePM-FTPcomp, in grams per mile as follows:
    1. (1)Use the following equation for PM measured as described in § 1066.815(b)(1), (2), or (3):
    2. (2)Use the following equation for PM measured as described in § 1066.815(b)(4):
    3. (3)Use the following equation for PM measured as described in § 1066.815(b)(5):