9 Va. Admin. Code § 5-91-180

Current through Register Vol. 41, No. 4, October 8, 2024

Section 9VAC5-91-180 - On-road high emitter emissions standards for on-road testing through remote sensing

A. No affected motor vehicle shall exceed the on-road high emitter emissions standards for carbon monoxide (CO), hydrocarbons (HC), or nitric oxide (NO) when measured with a remote sensing device and in accordance with the inspection procedures prescribed in Part XII (9VAC5-91-740 et seq.).

B. The on-road high emitter emissions standards for a vehicle shall be determined by multiplying the value in the Table III-B of 9VAC5-91-180 by the ASM 25-25 standard in 9VAC5-91-810 or two speed idle standard in Table III-A of 9VAC5-91-160 as is applicable for the vehicle.

C. Any affected motor vehicle determined to have exceeded any on-road high emitter emissions standards when measured by a remote sensing device in accordance with the procedures of Part XII (9VAC5-91-740 et seq.) may be subject to an emissions inspection at an emissions inspection station in accordance with Part XII (9VAC5-91-740 et seq.) or a civil charge in accordance with § 46.2-1178.1B of the Code of Virginia, or both.

D. Any affected motor vehicle that exceeds the on-road high emitter emissions standards two days in any 120-day period shall be considered to have violated the emissions standards. In addition, the department may use the vehicle emissions index as a screening requirement.

E. Any affected motor vehicle that exceeds the on-road high emitter emissions standards once and is also determined to have a vehicle emissions index of greater than 75 shall be considered to have violated the on-road high emitter emissions standards.

F. All remote sensing measurements used to determine if a vehicle exceeds the on-road high emitter emissions standards shall be taken at valid sites under conditions at which the vehicle specific power (VSP) indicator is between 3 and 22. Standards for NO shall be corrected for VSP using the following formula:

NO standard = Low Range Value + (VSP-3)/

19 x (High Range Value - Low Range Value).

Where:

Low Range Value = the smaller values in Table III-B in the NO (ppm) Range column;

VSP = vehicle specific power indicator; and

High Range Value = the larger values in Table III-B in the NO (ppm) Range column.

G. The director may adjust the values in Table III-B if it is determined that an on-road high emitter emissions standard is causing a confirmation test pass rate in excess of 20% or less than 5.0%. Such adjustments may be for specific models within each model year group based on manufacturer's emissions control technology.

TABLE III-B.
HIGH EMITTER VALUES FOR REMOTE SENSING
One or More On-Road Measurements ASM Based Vehicle Must Have a Vehicle Emissions Index of 75% or Higher
Period/Model Year/Vehicle Type		CO	HC	NO Range(1)
Low	High
1981 through 1990 - LDGT (1 or 2)		4.0	5.0	2.5	3.3
1981 through 1990 - LDGV		12.0	4.5	1.5	2.0
1991 through 1995 - LDGT (1 or 2)		4.0	5.0	2.5	3.3
1991 through 1995 - LDGV		8.0	6.0	1.5	2.0
1996 and newer - LDGT (1 or 2)		7.0	4.5	2.5	3.3
1996 and newer - LDGV		9.0	6.0	2.2	2.9
Two or More On-Road Measurements ASM Based
Period/Model Year/Vehicle Type		CO	HC	NO Range(1)
Low	High
1981 through 1990 - LDGT (1 or 2)		3.0	3.8	2.1	2.8
1981 through 1990 - LDGV		9.0	3.4	1.3	1.7
1991 through 1995 - LDGT (1 or 2)		3.0	3.8	2.1	2.8
1991 through 1995 - LDGV		6.0	4.5	1.3	3.3
1996 and newer LDGT (1 or 2)		5.3	3.4	2.1	2.8
1996 and newer LDGV		6.8	4.5	1.9	2.5
One or More On-Road Measurements TSI Based Vehicle Must Have a Vehicle Emissions Index of 75% or Higher
Period/Model Year/Vehicle Type		CO	HC	NO Range(1)
Low	High
1968 through 1980- LDGT (1 or 2)		2.0	1.5
1968 through 1980 - LDGV		2.0	1.5
1968 through 1980 - HDGV		2.0	1.5
1981 through 1990 - LDGT (1 or 2)		3.0	3.5
1981 through 1990 - LDGV		3.0	3.5
1981 through 1990 - HDGV		3.0	3.5
1991 through 1995 - LDGT (1 or 2)		3.0	4.0
1991 through 1995 - LDGV		3.0	4.0
1991 through 1995 - HDGV		3.0	4.0
1996 and newer - LDGT (1 or 2)		4.0	4.0
1996 and newer - LDGV		4.0	4.0
1996 and newer - HDGV		4.0	4.0
Two or More On-Road Measurements TSI Based
Period/Model Year/Vehicle Type		CO	HC	NO Range(1)
Low	High
1968 through 1980- LDGT (1 or 2)		1.5	1.1
1968 through 1980 - LDGV		1.5	1.1
1968 through 1980 - HDGV		1.5	1.1
1981 through 1990 - LDGT (1 or 2)		2.3	2.6
1981 through 1990 - LDGV		2.3	2.6
1981 through 1990 - HDGV		2.3	2.6
1991 through 1995 - LDGT (1 or 2)		2.3	3.0
1991 through 1995 - LDGV		2.3	3.0
1991 through 1995 - HDGV		2.3	3.0
1996 and newer - LDGT (1 or 2)		3.0	3.0
1996 and newer - LDGV		3.0	3.0
1996 and newer - HDGV		3.0	3.0
1NO Value = Low Range Value + (Actual VSP-3)/19 x (High Range Value - Low Range Value)

9 Va. Admin. Code § 5-91-180

Derived from Virginia Register Volume 13, Issue 5, eff. January 24, 1997; amended, Virginia Register Volume 18, Issue 20, eff. October 1, 2002; Volume 21, Issue 19, eff. June 29, 2005; Volume 29, Issue 9. eff. December 15, 2012.

Statutory Authority

§ 46.2-1180 of the Code of Virginia; § 182 of the federal Clean Air Act; 40 CFR Part 51, Subpart S.