Teledyne 4220 - Manual (Page 181)

4220 Flow Meter
Appendix D General Safety Procedures
D-9
Sludge
Gas —*** Mostly a simple
asphyxiant. May
be practically
odorless, taste-
less. Variable Will not support
life. No data. Would
vary widely with composition. 5.3 19.3 Near top of
structure. From
digestion
of sludge. See compo-
nents.
Sulfur
Dioxide SO
2
Colorless, pun-
gent odor. Suffo-
cating, corrosive,
poisonous,
non-flammable. 2.26 Inflammation of
the eyes. 400 to
500 ppm imme-
diately fatal. 50
to
100
10 — — At bottom, can
combine with
water to form
sulfurous acid. Industrial
waste,
combus-
tion, com-
mon air
pollutant. Detectable
taste and odor
at low concen-
tration.
Toluene C
5
H
12
to
C 9 H 20
Colorless, ben-
zene-like odor. 3.14 At 200-500 ppm,
headache, nau-
sea, bad taste,
lassitude. 200 100 1.27 7.0 At bottom. Solvent. Combustible
gas indicator.
Turpentine C
10
H
16
Colorless, Char-
acteristic odor. 4.84 Eye irritation.
Headache, diz-
ziness, nausea,
irritation of the
kidneys. — 100 At bottom. Solvent,
used in
paint. 1. Detectable
odor at low
concentration
s.
2.Combustible
gas indica-
tor.
Xylene C
8
H
10
Colorless, flam-
mable 3.66 Narcotic in high
concentrations.
less toxic than
benzene. — 100 1.1 7.0 At bottom. Solvent Combustible
gas indicator.
* Percentages shown represent volume of gas in air.
** For concentration over 0.3%.
***Mostly methane and carbon dioxide with small amounts of hydrogen, nitrogen, hydrogen sulfide, and oxygen; occasionally traces of carbon monoxide.
Table D-1 Hazardous Gases (Continued)
Gas
Chemical
Formula Common
Properties
Specific
Gravity
or Vapor
Density
Air =1
Physiological
Effect
Max
Safe 60
Min. Exposure
ppm Max. Safe
8 Hour
Exposure
ppm
Explosive
Range (% by
vol. in air)
Limits
lower/upper Likely
Location
of
Highest
Concentration
Most
Common
Sources
Simplest and
Cheapest
Safe Method
of Testing