40 CFR 61.03 - Units and abbreviations.

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There are 4 Updates appearing in the Federal Register for 40 CFR 61. View below or at eCFR (GPOAccess)
§ 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
m3=cubic meter
mg=milligram=10−3gram
mm=millimeter=10−3meter
Mg=megagram=106gram
mol=mole
N=newton
ng=nanogram=10−9gram
nm=nanometer=10−9meter
Pa=pascal
s=second
V=volt
W=watt
Ω=ohm
µg=microgram=10−6gram
(b) Other units of measure:
°C=degree Celsius (centigrade)
cfm=cubic feet per minute
cc=cubic centimeter
Ci=curie
d=day
°F=degree Fahrenheit
ft2=square feet
ft3=cubic feet
gal=gallon
in=inch
in Hg=inches of mercury
in H2O=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
°R=degree Rankine
µl=microliter=10−6liter
v/v=volume per volume
yd2=square yards
yr=year
(c) Chemical nomenclature:
Be=beryllium
Hg=mercury
H2O=water
(d) Miscellaneous:
act=actual
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]

Title 40 published on 2014-07-01

The following are only the Rules published in the Federal Register after the published date of Title 40.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2015-02-24; vol. 80 # 36 - Tuesday, February 24, 2015
    1. 80 FR 9613 - New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Louisiana
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Direct final rule; delegation of authority.
      This rule is effective on April 27, 2015 without further notice, unless EPA receives relevant adverse comment by March 26, 2015. If EPA receives such comment, EPA will publish a timely withdrawal in the Federal Register informing the public that the updated NESHAPs delegation will not take effect; however, the NSPS delegation will not be affected by such action.
      40 CFR Parts 60, 61, and 63

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This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

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United States Code
U.S. Code: Title 42 - THE PUBLIC HEALTH AND WELFARE

Title 40 published on 2014-07-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 40 CFR 61 after this date.

  • 2015-02-24; vol. 80 # 36 - Tuesday, February 24, 2015
    1. 80 FR 9613 - New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Louisiana
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Direct final rule; delegation of authority.
      This rule is effective on April 27, 2015 without further notice, unless EPA receives relevant adverse comment by March 26, 2015. If EPA receives such comment, EPA will publish a timely withdrawal in the Federal Register informing the public that the updated NESHAPs delegation will not take effect; however, the NSPS delegation will not be affected by such action.
      40 CFR Parts 60, 61, and 63