eCFR Reference Browser

---

title: "40 CFR §1039.105"

source: "https://www.ecfr.gov/current/title-40/section-1039.105"

title_number: "40"

volume_number: "36"

chapter_number: "Unknown"

subchapter_code: "U"

subchapter_subject: "AIR POLLUTION CONTROLS"

part_code: "1039"

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

subpart_code: "B"

subpart_subject: "Emission Standards and Related Requirements"

section_number: "1039.105"

section_subject: "What smoke standards must my engines meet?"

cfr_reference: "40 CFR 1039.105"

title_name: "Title 40"

title_subject: "Protection of Environment"

parts_covered: "Parts 1000 to 1059"

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"

---

(a)The smoke standards in this section apply to all engines subject to emission standards under this part, except for the following engines:

(1)Single-cylinder engines.

(2)Constant-speed engines.

(3)Engines certified to a PM emission standard or FEL of 0.07 g/kW-hr or lower.

(b)Measure smoke as specified in § 1039.501(c). Smoke from your engines may not exceed the following standards:

(1)20 percent during the acceleration mode.

(2)15 percent during the lugging mode.

(3)50 percent during the peaks in either the acceleration or lugging modes.

§1039.105 - What smoke standards must my engines meet?