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 CO 2 -- 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 ft 2 -- square feet ft 3 -- 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 H 2 O -- water H 2 S -- hydrogen sulfide H 2 SO 4 -- sulfuric acid Hz -- hertz I.D. -- inside diameter in -- inch inHg -- inches of mercury inH 2 O -- inches of water J -- joule K -- Kelvin k -- 1,000 kg -- kilogram = 10 3 gram l -- liter lb -- pound lpm -- liter per minute M -- molar m -- meter m 3 -- cubic meter meq -- milliequivalent Mg -- megagram = 10 6 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 N 2 -- nitrogen ng -- nanogram = 10 -9 gram nm -- nanometer = 10 -9 meter NO -- nitric oxide NO 2 -- nitrogen dioxide NO X -- nitrogen oxides O 2 -- 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. PM 10 -- particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers PM 2.5 -- 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 SO 2 -- sulfur dioxide SO 3 -- sulfur trioxide SO X -- 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 yd 2 -- square yard yr -- year % -- percent Ω -- ohm § -- section