{"data":{"id":"us-va/9vac5-10-30","jurisdiction":"us-va","citation":"9VAC5-10-30","heading":"Abbreviations","body":"A -- ampere\n\nact -- actual\n\nAQCR -- Air Quality Control Region\n\nAQMA -- Air Quality Maintenance Area\n\nASTM -- American Society for Testing and Materials\n\navg -- average\n\nBe -- Beryllium\n\nBtu -- British thermal unit\n\n°C -- degree Celsius (centigrade)\n\ncal -- calorie\n\ncc -- cubic centimeter\n\nCdS -- cadmium sulfide\n\ncfm -- cubic feet per minute\n\nCFR -- Code of Federal Regulations (40 CFR 35 means Part 35 of Title 40 of the Code of Federal Regulations; 40 CFR 35.20 means Section 35.20 in Part 35 of Title 40 of the Code of Federal Regulations)\n\nCO -- carbon monoxide\n\nCO2 -- carbon dioxide\n\nCOH -- Coefficient of Haze (unit of measure for the soiling index)\n\ncu ft -- cubic feet\n\nd -- day\n\ndcf -- dry cubic feet\n\ndcm -- dry cubic meter\n\ndscf -- dry cubic feet at standard conditions\n\ndscm -- dry cubic meter at standard conditions\n\nEPA -- U.S. Environmental Protection Agency\n\neq -- equivalents\n\n°F -- degree Fahrenheit\n\nFR -- Federal Register (36 FR 1492, May 3, 1971 means page 1492, dated May 3, 1971, of Volume 36 of the Federal Register - the page indicated is the first page of the referenced material)\n\nft -- feet\n\nft2 -- square feet\n\nft3 -- cubic feet\n\ng -- gram\n\ngal -- gallon\n\nGEP -- good engineering practice\n\ng-eq -- gram equivalents\n\ngr -- grain\n\nHCl -- hydrochloric acid or hydrogen chloride\n\nHg -- mercury\n\nhp -- horse power\n\nhr -- hour\n\nH2O -- water\n\nH2S -- hydrogen sulfide\n\nH2SO4 -- sulfuric acid\n\nHz -- hertz\n\nI.D. -- inside diameter\n\nin -- inch\n\ninHg -- inches of mercury\n\ninH2O -- inches of water\n\nJ -- joule\n\nK -- Kelvin\n\nk -- 1,000\n\nkg -- kilogram = 103 gram\n\nl -- liter\n\nlb -- pound\n\nlpm -- liter per minute\n\nM -- molar\n\nm -- meter\n\nm3 -- cubic meter\n\nmeq -- milliequivalent\n\nMg -- megagram = 106 gram\n\nmg -- milligram = 10-3 gram\n\nmin -- minute\n\nml -- milliliter = 10-3 liter\n\nmm -- millimeter = 10-3 meter\n\nmol -- mole\n\nmol.wt. -- molecular weight\n\nMSA -- Metropolitan Statistical Area\n\nmV -- millivolt = 10-3 volt\n\nN -- normal\n\nn -- newton\n\nN2 -- nitrogen\n\nng -- nanogram = 10-9 gram\n\nnm -- nanometer = 10-9 meter\n\nNO -- nitric oxide\n\nNO2 -- nitrogen dioxide\n\nNOX -- nitrogen oxides\n\nO2 -- oxygen\n\nO.D. -- outside diameter\n\noz -- ounce\n\nPa -- pascal\n\nPM -- particulate matter; any airborne finely divided solid or liquid material with an aerodynamic diameter smaller than 100 micrometers.\n\nPM10 -- particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers\n\nPM2.5 -- particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers\n\nppb -- parts per billion\n\nppm -- parts per million\n\npsi -- pounds per square inch\n\npsia -- pounds per square inch absolute\n\npsig -- pounds per square inch gauge\n\n°R -- degree Rankine\n\ns -- second\n\nscf -- cubic feet at standard conditions\n\nscfh -- cubic feet per hour at standard conditions\n\nscm -- cubic meter at standard conditions\n\nsec -- second\n\nSO2 -- sulfur dioxide\n\nSO3 -- sulfur trioxide\n\nSOX -- sulfur oxides\n\nsq ft -- square feet\n\nstd -- at standard conditions or standard\n\nμg -- microgram = 10-6 gram\n\nμl -- microliter = 10-6 liter\n\nUSC -- United States Code\n\nV -- volt\n\nv/v -- volume per volume\n\nVOC -- volatile organic compound\n\nW -- watt\n\nw.g. -- water gauge\n\nyd2 -- square yard\n\nyr -- year\n\n% -- percent\n\nΩ -- ohm\n\n§ -- section","path":["Title 9. Environment","Agency 5. State Air Pollution Control Board","Chapter 10. General Definitions"],"source_url":"https://law.lis.virginia.gov/admincode/title9/agency5/chapter10/section30/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:48:02Z","sha256":"7bf1002983fa50e1cfa2ddb047e992743bc781d162e746e61d0043d0472a0fd3","source_id":"us-va-vac","stale":false,"prev":"us-va/9vac5-10-20","next":"us-va/9vac5-10-30-1"},"notice":"GroundRules: Original legal text. Not legal advice."}