GroundRules
9VAC5-91-160: Exhaust emission standards for two-speed idle testing in enhanced emissions inspection programs
Where this section sits in the code
- Title 9. Environment
- Agency 5. State Air Pollution Control Board
- Chapter 91. Regulations for the Control of Motor Vehicle Emissions in the Northern Virginia Area
Emission Standards for Motor Vehicle Air Pollution
A. No motor vehicle subject to the two-speed idle test shall discharge carbon monoxide (CO), or hydrocarbons (HC) in its exhaust emissions in excess of standards set forth in Table III-A when measured with a certified analyzer system and in accordance with the two-speed idle inspection procedures prescribed in Part VI (9VAC5-91-410 et seq.).
B. The measured concentration of CO plus CO2 shall be greater than or equal to 6.0%.
C. The standards in Table III-A may be adjusted by no more than one percentage point for CO and 150 ppm for HC in order to meet the requirements of the Environmental Protection Agency or the federal Clean Air Act.
TABLE III-A.
EXHAUST EMISSION STANDARDS FOR TWO-SPEED IDLE EMISSIONS INSPECTIONS TESTS.
Model Year
HC (ppm)
CO (%)
For idle test and 2500 RPM test for vehicles up to 8500 pounds GVWR:
1996 & later
110
0.75
1990-95
125
1.0
1981-89
220
1.2
1980
220
2.0
1975-79
400
4.0
1970‑74
600
6.0
1968‑69
800
8.0
For vehicles from 8501 to 10000 pounds GVWR:
1997 & later
125
0.75
1991-96
150
1.0
1981-90
220
1.2
1980
220
2.0
1975-79
400
4.0
1970-74
600
6.0
1968-69
800
8.0
Collected 2026-09-14T04:48:41Z. Source file · JSON