Virginia Administrative Code (Last Updated: January 10, 2017) |
Title 9. Environment |
Agency 5. State Air Pollution Control Board |
Chapter 91. |
Section 185. Clean screen vehicle emissions standards for on-road testing
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A. Clean screen vehicles shall be identified by an on-road emissions inspector using on-road testing based on all of the following criteria until the provisions of subsection B of this section become effective according to the schedule in subsection D of 9VAC5-91-740:
1. Up to 5.0% of the number of vehicles measured during any 30-day period may be identified as clean screen vehicles. This percentage may be evaluated annually by the department and adjusted based on the amount of emissions reduction lost due to clean screening.
2. Vehicles that have the cleanest measurements based on an average of at least three measurements (taken on three different days in a 120-day time period) may be identified as clean screen vehicles.
3. Vehicles must have no measurements exceeding the on-road high emitter emissions standard within the 120-day time period as required in subdivision 2 of this subsection to be identified as clean screen vehicles.
4. Vehicles must not be equipped with an OBD system unless DEQ makes a determination to include certain OBD model years based on evidence that there would not be a significant loss in emissions reduction benefits.
B. Vehicles shall be identified as clean screen vehicles by an on-road emissions inspector using on-road testing based on the following criteria:
1. The vehicle is due for an emissions inspection test within 120 days;
2. The result of the most recent initial emissions test on record with the department is not a "fail";
3. No on-road emissions measurement since the most recent initial emissions test exceeds the on-road high emitter emissions standards as determined according to 9VAC5-91-180 B;
4. The two most recent on-road emissions measurements taken within 12 months of the registration expiration date shall not exceed the clean screen standards as determined in subsection D of this section and the vehicle must have a vehicle emissions index no greater than 80; or
5. The most recent on-road emissions measurement taken within 12 months of the registration expiration date shall not exceed the clean screen standards as determined in subsection D of this section and the vehicle shall have a vehicle emissions index no greater than 75.
C. On an annual basis, at least 2.0% of the vehicles meeting the clean screen criteria in subsection B of this section shall not be notified of the clean screen and may receive an emissions test at an emission inspection station. The department shall analyze these test results to determine the effect of on-road testing on total emissions reductions. The director may decrease the maximum vehicle emissions index specified in subdivision B 4 and 5 of this section as necessary to ensure compliance with federal requirements in accordance with 9VAC5-91-740 F.
D. The clean screen vehicle standards are determined as a percentage of the values in Table III-C. The director may adjust the percentage between 50% to 80% to ensure compliance with federal requirements in accordance with 9VAC5-91-740 F.
E. The director may exempt certain vehicle models with known emissions related deficiencies.
F. Clean screen vehicles in accordance with subsections A and B of this section may be recorded as having passed the next emissions inspection required by § 46.2-1178 of the Code of Virginia and the result shall be entered into the emissions inspection record for that vehicle.
TABLE III-C
On Road Clean Screen Maximum Standards
Emissions Test Weight (ETW)
LDGV
LDGT 1 & 2
HC(ppm)
CO(%)
NO (ppm)
HC(ppm)
CO(%)
NO (ppm)
1750
136
0.77
1095
136
0.77
1095
1875
129
0.73
1031
129
0.73
1031
2000
123
0.69
973
123
0.69
973
2125
116
0.66
920
116
0.66
920
2250
111
0.62
871
111
0.62
871
2375
106
0.59
827
106
0.59
827
2500
101
0.57
786
101
0.57
786
2625
97
0.54
749
97
0.54
749
2750
93
0.52
715
93
0.52
715
2875
89
0.50
684
89
0.50
684
3000
86
0.48
656
86
0.48
656
3125
83
0.46
630
83
0.46
630
3250
80
0.45
607
80
0.45
607
3375
78
0.43
585
78
0.43
585
3500
76
0.42
566
76
0.42
566
3625
74
0.41
547
75
0.41
547
3750
72
0.40
531
72
0.40
531
3875
70
0.39
515
91
0.50
644
4000
68
0.38
501
88
0.49
626
4125
67
0.37
487
87
0.48
609
4250
65
0.36
475
84
0.47
594
4375
64
0.35
463
83
0.46
579
4500
63
0.35
451
81
0.45
564
4625
61
0.34
440
79
0.44
551
4750
60
0.33
430
78
0.43
538
4875
59
0.33
420
76
0.43
525
5000
58
0.32
410
75
0.42
513
5125
57
0.31
400
74
0.41
500
5250
56
0.31
391
72
0.40
489
5375
55
0.30
382
71
0.39
478
5500
54
0.30
373
70
0.39
466
5625
53
0.30
364
68
0.38
455
5750
52
0.29
356
67
0.37
445
5875
51
0.28
348
66
0.36
435
6000
50
0.28
340
65
0.36
425
6125
49
0.27
333
64
0.35
416
6250
48
0.27
326
62
0.35
408
6375
48
0.26
320
62
0.34
400
6500
47
0.26
315
61
0.34
394
6625
46
0.26
311
60
0.34
389
6750
46
0.26
307
60
0.34
384
6875
46
0.25
305
60
0.33
382
7000
46
0.25
305
59
0.33
381
7125
46
0.25
305
59
0.33
381
7250
46
0.25
305
59
0.33
381
7375
46
0.25
305
59
0.33
381
7500
46
0.25
305
59
0.33
381
Historical Notes
Derived from Volume 29, Issue 09, 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.