health and safety plan solid waste management unit assessment

AUTOMOTIVE GASOLINE 65-2
PHYSICO-
CHEMICAL
DATA
(continued)
0 Log (Octanol-Water Partition Coefficient),
log K : 2.13-4.87
l Soil Ad&ption Coefficient, K : 65-36,000
0 Henry's Law Constant (atm-m3/m% at 2O'C):
4.8 x lo-4 - 3.3 (*I
l Bioconcentration Factor: no data ( >
("1
("1
PERSISTENCE
IN THE SOIL-
WATER SYSTM
Gasoline hydrocarbons are expected to be relatively mobile
and moderately persistent in most soil systems. Persistence
in deep soils and ground water may be higher. Volatilization,
photooxidation and biodegradation are important fate
processes. Surface spills are expected to be weathered by
evaporation and photooxidation. Downward migration of
weathered surface spills and sub-surface discharges represent
a potential threat to underlying ground water. Biodegradation
of gasoline hydrocarbons is expected to be significant
under environmental conditions favorable to microbial
oxidation; naturally-occurring, hydrocarbon-degrading
microorganisms have been isolated from polluted soils and,
to a lesser extent, non-polluted soils.
The primary pathway of concern from tne sorL/grouna-water
system is the migration of gasoline to ground water drinking
PATHWAYS water supplies from leaking underground storage tanks or
OF large spills. The use of this water may cause inhalation
EXPOSURE exposures as well as ingestion and dermal exposures. Vapors
from leaked or spilled gasoline may diffuse through soil and
migrate into structures, resulting in inhalation exposures.
I
J
osure (54'1:
Gasoline vapor
duce flushing,
is a CNS depressant. Low vapor
staggering gait, slurred speech
levels may
and mental
pro
con
fusion. High vapor levels may cause coma and death from
respiratory failure.
chemical pneumonitis,
Ingestion
pulmonary
and aspiration may cause
edema and hemorrhage. Gaso -
HEALTH
line is irritating to the skin, conjunctiva and mucous membranes.
Prolonged contact may defat the skin and cause dermatitls.
Certain individuals may develop hypersensitivity.
DATA
WHJ hm5)
LCLo'(mg/ms)
oral 13,600 (rat] (1924) inhalation [mammal] (51
skin -- no data 135,000*5 min
.
* Range of values for representative hydrocarbons from major component classes
(See Table 65-3).
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