[Code of Federal Regulations]
[Title 40, Volume 8]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR61.03]

[Page 10-11]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 61--NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS--Table of Contents
 
                      Subpart A--General Provisions
 
Sec. 61.03  Units and abbreviations.

    Used in this part are abbreviations and symbols of units of measure. 
These are defined as follows:
    (a) System International (SI) units of measure:

A=ampere
g=gram
Hz=hertz
J=joule
K=degree Kelvin
kg=kilogram
m=meter
m2=square meter
m \3\=cubic meter
mg=milligram=10-3gram
mm=millimeter=10-3meter
Mg=megagram=10-6gram
mol=mole
N=newton
ng=nanogram=10-9gram
nm=nanometer=10-9meter
Pa=pascal
s=second
V=volt
W=watt
[Omega]=ohm
[mu]g=microgram=10-6gram

    (b) Other units of measure:

 deg.C=degree Celsius (centigrade)
cfm=cubic feet per minute
cc=cubic centimeter
Ci=curie
d=day
 deg.F=degree Fahrenheit
ft \2\=square feet
ft \3\=cubic feet
gal=gallon
in=inch
in Hg=inches of mercury
in H2 O=inches of water
l=liter
lb=pound
lpm=liter per minute
min=minute
ml=milliliter=10-3liter
mrem=millirem=10-3 rem
oz=ounces
pCi=picocurie=10-12 curie
psig=pounds per square inch gage
 deg.R=degree Rankine
[mu]=microliter=10-6liter
v/v=volume per volume
yd \2\=square yards
yr=year

    (c) Chemical nomenclature:

Be=beryllium
Hg=mercury
H2O=water

    (d) Miscellaneous:

act=actual

[[Page 11]]

avg=average
I.D.=inside diameter
M=molar
N=normal
O.D.=outside diameter
%=percent
std=standard

[42 FR 51574, Sept. 29, 1977, as amended at 54 FR 51704, Dec. 15, 1989]