California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 7 - General Industry Safety Orders
Group 16 - Control of Hazardous Substances
Article 107 - Dusts, Fumes, Mists, Vapors and Gases
Section 5146 - Internal Combustion Engine Exhaust Emission Control

Universal Citation: 8 CA Code of Regs 5146

Current through Register 2024 Notice Reg. No. 38, September 20, 2024

(a) Exhaust purifier devices shall be used, supplementary to natural or forced dilution ventilation or exhaust collection systems, if required to maintain the concentrations of dangerous gases or fumes below the maximum acceptable concentrations.

(b) Only approved exhaust purifier devices shall be used to comply with 5146(a) in enclosed places.

NOTE: Approval by the Division will in all cases be based on the Maximum Allowable Standards for Internal Combustion Engine Exhaust Emissions as set forth in 5146(c).

Devices certified as meeting the standard by the California Air Resources Board pursuant to Labor Code Section 6702 are automatically approved.

(1)

Engine Displacement in cubic inches	Carbon Monoxide percent
50-100	2.3
100-140	2.0
140 or greater	1.5

(2) Exhaust gas concentrations shall be adjusted to a dry exhaust volume using the ratio 15 / [ 1/2 (% CO) + % CO2 + 10(% Hydrocarbon)].

(3) Hydrocarbons are defined as the organic constituents of exhaust as measured by a hexane-sensitized nondispersive infrared analyzer or equivalent.

(4) Carbon monoxide shall be measured by a nondispersive infrared analyzer or equivalent.

(5) The standards refer to a composite sample representing the operating condition described as follows:

Operating Condition

Inches of Mercury Intake Manifold Vacuum		Percent of Time
IDLE..........................		..........................30
CRUISE
	1000 RPM @ 16" of Mercury Intake Manifold Vacuum..........................	..........................20
	1000 RPM @ 11" of Mercury Intake Manifold Vacuum..........................	..........................20
	2000 RPM @ 16" of Mercury Intake Manifold Vacuum..........................	..........................10
	2000 RPM @ 10" of Mercury Intake Manifold Vacuum..........................	..........................10
ACCELERATION
	Idle to 2500 RPM in 5 seconds @ 6" vacuum..........................	..........................5
DECELERATION
	2000-500 RPM greater than 20" vacuum..........................	..........................5

1. Change without regulatory effect amending subsection (b) and adding new NOTE filed 2-4-2005 pursuant to section 100, title 1, California Code of Regulations (Register 2005, No. 5).

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

Disclaimer: These regulations may not be the most recent version. California may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.