eCFR Reference Browser

---

title: "40 CFR §89.417"

source: "https://www.ecfr.gov/current/title-40/section-89.417"

title_number: "40"

volume_number: "22"

chapter_number: "Unknown"

subchapter_code: "C"

subchapter_subject: "AIR PROGRAMS (CONTINUED)"

part_code: "89"

part_subject: "CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES"

subpart_code: "E"

subpart_subject: "Exhaust Emission Test Procedures"

section_number: "89.417"

section_subject: "Data evaluation for gaseous emissions."

cfr_reference: "40 CFR 89.417"

title_name: "Title 40"

title_subject: "Protection of Environment"

parts_covered: "Parts 87 to 95"

revised_date: "Revised as of July 1, 2017"

publication_date: "As of July 1, 2017"

contains_description: "Containing a codification of documents of general applicability and future effect"

publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"

---

For the evaluation of the gaseous emission recording, the last 60 seconds of each mode are recorded, and the average values for HC, CO, CO2, and NOX during each mode are determined from the average concentration readings determined from the corresponding calibration data.

§89.417 - Data evaluation for gaseous emissions.