40 CFR 61.03 - Units and abbreviations.

§ 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
m 2 = 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
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
ft 2 = square feet
ft 3 = 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
yd 2 = 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]

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

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

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.


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

Title 40 published on 2015-08-22

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

  • 2017-05-11; vol. 82 # 90 - Thursday, May 11, 2017
    1. 82 FR 21927 - Delegation of New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants for the States of Arizona and Nevada
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Direct final rule.
      This rule is effective on July 10, 2017 without further notice, unless EPA receives adverse comments by June 12, 2017. If we receive such comments, we will publish a timely withdrawal in the Federal Register to notify the public that this direct final rule will not take effect.
      40 CFR Parts 60, 61 and 63