40 C.F.R. § 60.3

Current through March 31, 2024

Section 60.3 - 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

m³-cubic meter

mg-milligram-10^-3 gram

mm-millimeter-10^-3 meter

Mg-megagram-10⁶ gram

mol-mole

N-newton

ng-nanogram-10^-9 gram

nm-nanometer-10^-9 meter

Pa-pascal

s-second

V-volt

W-watt

&-ohm

[MICRO]g-microgram-10^-6 gram

(b) Other units of measure:

Btu-British thermal unit

°C-degree Celsius (centigrade)

cal-calorie

cfm-cubic feet per minute

cu ft-cubic feet

dcf-dry cubic feet

dcm-dry cubic meter

dscf-dry cubic feet at standard conditions

dscm-dry cubic meter at standard conditions

eq-equivalent

°F-degree Fahrenheit

ft-feet

gal-gallon

gr-grain

g-eq-gram equivalent

hr-hour

in-inch

k-1,000

l-liter

lpm-liter per minute

lb-pound

meq-milliequivalent

min-minute

ml-milliliter

mol. wt.-molecular weight

ppb-parts per billion

ppm-parts per million

psia-pounds per square inch absolute

psig-pounds per square inch gage

°R-degree Rankine

scf-cubic feet at standard conditions

scfh-cubic feet per hour at standard conditions

scm-cubic meter at standard conditions

sec-second

sq ft-square feet

std-at standard conditions

(c) Chemical nomenclature:

CdS-cadmium sulfide

CO-carbon monoxide

CO₂-carbon dioxide

HCl-hydrochloric acid

Hg-mercury

H₂O-water

H₂S-hydrogen sulfide

H₂SO₄-sulfuric acid

N₂-nitrogen

NO-nitric oxide

NO₂-nitrogen dioxide

NO_X-nitrogen oxides

O₂-oxygen

SO₂-sulfur dioxide

SO₃-sulfur trioxide

SO_X-sulfur oxides

(d) Miscellaneous:

A.S.T.M.-American Society for Testing and Materials

40 C.F.R. §60.3

42 FR 37000, July 19, 1977; 42 FR 38178, July 27, 1977