eCFR Reference Browser

---

title: "40 CFR §1066.820"

source: "https://www.ecfr.gov/current/title-40/section-1066.820"

title_number: "40"

volume_number: "37"

chapter_number: "Unknown"

subchapter_code: "U"

subchapter_subject: "AIR POLLUTION CONTROLS"

part_code: "1066"

part_subject: "VEHICLE-TESTING PROCEDURES"

subpart_code: "I"

subpart_subject: "Exhaust Emission Test Procedures for Motor Vehicles"

section_number: "1066.820"

section_subject: "Composite calculations for FTP exhaust emissions."

cfr_reference: "40 CFR 1066.820"

title_name: "Title 40"

title_subject: "Protection of Environment"

parts_covered: "Part 1060 to End"

revised_date: "Revised as of July 1, 2019"

publication_date: "As of July 1, 2019"

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"

---

(a)Determine the mass of exhaust emissions of each pollutant for each FTP test interval as described in § 1066.605.

(b)Calculate the final composite gaseous test results as a mass-weighted value, e

[emission]-FTPcomp, in grams per mile using the following equation:

(c)Calculate the final composite PM test results as a mass-weighted value, e

PM-FTPcomp, in grams per mile as follows:

(1)Use the following equation for PM measured as described in § 1066.815(b)(1), (2), or (3):

(2)Use the following equation for PM measured as described in § 1066.815(b)(4):

(3)Use the following equation for PM measured as described in § 1066.815(b)(5):

§1066.820 - Composite calculations for FTP exhaust emissions.