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Virginia Administrative Code
Title 9. Environment
Agency 5. State Air Pollution Control Board
Chapter 10. General Definitions
12/5/2019

9VAC5-10-30. Abbreviations.

A -- ampere

act -- actual

AQCR -- Air Quality Control Region

AQMA -- Air Quality Maintenance Area

ASTM -- American Society for Testing and Materials

avg -- average

Be -- Beryllium

Btu -- British thermal unit

°C -- degree Celsius (centigrade)

cal -- calorie

cc -- cubic centimeter

CdS -- cadmium sulfide

cfm -- cubic feet per minute

CFR -- 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)

CO -- carbon monoxide

CO2 -- carbon dioxide

COH -- Coefficient of Haze (unit of measure for the soiling index)

cu ft -- cubic feet

d -- day

dcf -- dry cubic feet

dcm -- dry cubic meter

dscf -- dry cubic feet at standard conditions

dscm -- dry cubic meter at standard conditions

EPA -- U.S. Environmental Protection Agency

eq -- equivalents

°F -- degree Fahrenheit

FR -- 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)

ft -- feet

ft2 -- square feet

ft3 -- cubic feet

g -- gram

gal -- gallon

GEP -- good engineering practice

g-eq -- gram equivalents

gr -- grain

HCl -- hydrochloric acid or hydrogen chloride

Hg -- mercury

hp -- horse power

hr -- hour

H2O -- water

H2S -- hydrogen sulfide

H2SO4 -- sulfuric acid

Hz -- hertz

I.D. -- inside diameter

in -- inch

inHg -- inches of mercury

inH2O -- inches of water

J -- joule

K -- Kelvin

k -- 1,000

kg -- kilogram = 103 gram

l -- liter

lb -- pound

lpm -- liter per minute

M -- molar

m -- meter

m3 -- cubic meter

meq -- milliequivalent

Mg -- megagram = 106 gram

mg -- milligram = 10-3 gram

min -- minute

ml -- milliliter = 10-3 liter

mm -- millimeter = 10-3 meter

mol -- mole

mol.wt. -- molecular weight

MSA -- Metropolitan Statistical Area

mV -- millivolt = 10-3 volt

N -- normal

n -- newton

N2 -- nitrogen

ng -- nanogram = 10-9 gram

nm -- nanometer = 10-9 meter

NO -- nitric oxide

NO2 -- nitrogen dioxide

NOX -- nitrogen oxides

O2 -- oxygen

O.D. -- outside diameter

oz -- ounce

Pa -- pascal

PM -- particulate matter; any airborne finely divided solid or liquid material with an aerodynamic diameter smaller than 100 micrometers.

PM10 -- particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers

PM2.5 -- particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers

ppb -- parts per billion

ppm -- parts per million

psi -- pounds per square inch

psia -- pounds per square inch absolute

psig -- pounds per square inch gauge

°R -- degree Rankine

s -- second

scf -- cubic feet at standard conditions

scfh -- cubic feet per hour at standard conditions

scm -- cubic meter at standard conditions

sec -- second

SO2 -- sulfur dioxide

SO3 -- sulfur trioxide

SOX -- sulfur oxides

sq ft -- square feet

std -- at standard conditions or standard

μg -- microgram = 10-6 gram

μl -- microliter = 10-6 liter

USC -- United States Code

V -- volt

v/v -- volume per volume

VOC -- volatile organic compound

W -- watt

w.g. -- water gauge

yd2 -- square yard

yr -- year

% -- percent

Ω -- ohm

§ -- section

Statutory Authority

§ 10.1-1308 of the Code of Virginia; Clean Air Act (§§ 110, 112, 165, 173, and 182 and Title V); 40 CFR Parts 51, 61, 63, 70, and 72.

Historical Notes

Derived from Volume 13, Issue 18, eff. July 1, 1997; amended, Virginia Register Volume 27, Issue 23, eff. August 17, 2011.

Website addresses provided in the Virginia Administrative Code to documents incorporated by reference are for the reader's convenience only, may not necessarily be active or current, and should not be relied upon. To ensure the information incorporated by reference is accurate, the reader is encouraged to use the source document described in the regulation.

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