{"data":{"id":"us-va/9vac5-91-790","jurisdiction":"us-va","citation":"9VAC5-91-790","heading":"ASM start-up standards","body":"ASM Exhaust Emission Standards\n\nThe following standards shall apply upon implementation of the emissions inspection program. The exhaust emissions standards for the following model years are cross-referenced by using the number in the column in Table 14.1 to locate the column that lists the appropriate standards in the look up tables in 9VAC5-91-810. Each column reference below corresponds to two columns, one for the ASM 5015 and one for the ASM 2525, in 9VAC5-91-810. The test standards are then listed in the appropriate column according to the Equivalent Test Weight.\n\nTABLE 14.1\n\nLight Duty Vehicles.\n\nModel Years\n\nHydrocarbons\n\n9VAC5-91-810 A\n\nCarbon Monoxide\n\n9VAC5-91-810 B\n\nOxides of Nitrogen\n\n9VAC5-91-810 C\n\n1996 and later\n\n1\n\n21\n\n41\n\n1991‑1995\n\n2\n\n22\n\n42\n\n1983‑1990\n\n4\n\n23\n\n43\n\n1981‑1982\n\n4\n\n26\n\n43\n\n1980\n\n4\n\n26\n\n48\n\n1977‑1979\n\n11\n\n30\n\n48\n\n1975‑1976\n\n11\n\n30\n\n50\n\n1973‑1974\n\n13\n\n34\n\n50\n\n1968‑1972\n\n13\n\n34\n\n51\n\nLight Duty Trucks 1 (less than 6000 pounds GVWR).\n\nModel Years\n\nHydrocarbons\n\n9VAC5-91-810 A\n\nCarbon Monoxide\n\n9VAC5-91-810 B\n\nOxides of Nitrogen\n\n9VAC5-91-810 C\n\n1996 and later\n\n(≤ 3750 LVW)\n\n1\n\n21\n\n41\n\n(\u003e 3750 LVW)\n\n2\n\n22\n\n42\n\n1991‑1995\n\n5\n\n26\n\n43\n\n1988‑1990\n\n7\n\n29\n\n44\n\n1984‑1987\n\n7\n\n29\n\n49\n\n1979‑1983\n\n11\n\n31\n\n49\n\n1975‑1978\n\n12\n\n32\n\n50\n\nLight Duty Trucks 2 (greater than 6000 pounds GVWR).\n\nModel Years\n\nHydrocarbons\n\n9VAC5-91-810 A\n\nCarbon Monoxide\n\n9VAC5-91-810 B\n\nOxides of Nitrogen\n\n9VAC5-91-810 C\n\n1997 and later\n\n(≤ 5750 LVW)\n\n2\n\n22\n\n42\n\n(\u003e 5750 LVW)\n\n5\n\n26\n\n45\n\n1991‑ 1996\n\n5\n\n26\n\n46\n\n1988‑1990\n\n7\n\n29\n\n47\n\n1984‑1987\n\n7\n\n29\n\n49\n\n1979‑1983\n\n11\n\n31\n\n49\n\n1975‑1978\n\n12\n\n32\n\n50","path":["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"],"source_url":"https://law.lis.virginia.gov/admincode/title9/agency5/chapter91/section790/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:48:43Z","sha256":"0a79deea914917fd14e6254720bb39dd9cae1b830cd400f7b45358ff05c693f9","source_id":"us-va-vac","stale":false,"prev":"us-va/9vac5-91-760","next":"us-va/9vac5-91-800"},"notice":"GroundRules: Original legal text. Not legal advice."}