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Subchapter 7. General Industry Safety Orders
Group 16. Control of Hazardous Substances
Article 107. Dusts, Fumes, Mists, Vapors and Gases

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§5146. Internal Combustion Engine Exhaust Emission Control.


(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.

(c) Maximum Allowable Standards for Internal Combustion Engine Exhaust Emissions.

(1)

 
Engine Displacement .. Carbon Monoxide  
in cubic inches ...... 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 P[1/2(% CO) + % CO 2 + 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 ...................................... Percent  
Intake Manifold Vacuum ................................. 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       
 
 

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

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

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