CFR › Title 40 › Part 1065 › §1065.85040 CFR §1065.850Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkUse the calculations specified in § 1065.665 to determine THCE or NMHCE and the calculations specified in 40 CFR 1066.635 to determine NMOG.