TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE B: AIR POLLUTION
CHAPTER II: ENVIRONMENTAL PROTECTION AGENCY
PART 276 PROCEDURES TO BE FOLLOWED IN THE PERFORMANCE OF INSPECTIONS OF MOTOR VEHICLE EMISSIONS
SECTION 276.203 DILUTION - STEADY-STATE IDLE EXHAUST TEST


 

Section 276.203  Dilution − Steady-State Idle Exhaust Test

 

To prevent excess dilution in a steady-state idle exhaust emissions test described in Section 276.204, the sample probe shall be inserted a minimum of 10 inches into the vehicle's tailpipe.  Extension boots shall be utilized if it is impossible to insert the sample probe at least 10 inches into the tailpipe.  A vehicle emission test shall be invalid if the applicable emission standards contained in 35 Ill. Adm. Code 240 are met but the sum of the CO and CO2 concentrations in the exhaust gas does not exceed 6 percent during the sample averaging period(s).

 

(Source:  Amended at 35 Ill. Reg. 11268, effective June 28, 2011)