40 CFR § 1065.850 - Calculations.

---
identifier: "/us/cfr/t40/s1065.850"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 1065.850 - Calculations."
title_number: 40
title_name: "Protection of Environment"
section_number: "1065.850"
section_name: "Calculations."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "U"
subchapter_name: "AIR POLLUTION CONTROLS"
part_number: "1065"
part_name: "ENGINE-TESTING PROCEDURES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401-7671q."
regulatory_source: "70 FR 40516, July 13, 2005, unless otherwise noted."
cfr_part: "1065"
---


# 1065.850 Calculations.

Use the calculations specified in § 1065.665 to determine THCE or NMHCE and the calculations specified in 40 CFR 1066.635 to determine NMOG.

[79 FR 23813, Apr. 28, 2014]