788/ Dangers of Hydrogen Sulphide / 992
Dan
g
ers of
H
y
dro
g
en Sul
p
h
ide
BOS-
P
RD-0
3
.90090
7
4.4
G
eneral
p
re
c
au
t
ions
t
o be
t
a
k
en
W
h
enever
operat
i
ng
i
n an
y
k
no
w
n or
s
u
spe
c
ted
H
2
S
areas
:
x
P
re
-
tas
k
p
l
ann
i
ng
i
s
v
i
ta
ll
y
i
mportant
to
ens
u
re
t
h
at
a
w
areness
i
s ma
i
nta
i
ned
and
t
h
at
a
ll
personne
l
are prepared
to
ta
k
e emergen
c
y
a
c
t
i
on
s
h
o
u
l
d t
h
i
s
be
re
q
u
i
red
;
x
T
h
e
Mas
t
er
shall
ens
u
re
t
h
at
ea
c
h
person
wh
o ma
y
be
a
ff
e
c
ted
i
s
i
n
f
ormed
o
f
t
h
e
potent
i
a
l
h
a
z
ards
asso
ci
ated
w
i
t
h
H
2
S
and
t
h
e pre
c
a
u
t
i
ons
t
h
at
shall
be
ad
h
ered
to
;
x
H
2
S
dete
c
tors
shall
be
prov
i
ded
and
p
l
a
c
ed
i
n
var
i
o
u
s
l
o
c
at
i
ons
onboard
t
h
e
vesse
l,
part
ic
u
l
ar
l
y
on
t
h
e
ma
i
n
w
or
ki
ng
de
ck
and
areas
wh
ere
personne
l
are
most
lik
e
l
y
to
be
e
x
posed
to
an
y
H
2
S
re
l
ease
;
x
S
e
l
f
c
onta
i
ned
,
press
u
re
demand
or
pos
i
t
i
ve
press
u
re
resp
i
rator
y
e
q
u
i
pment
shall
be
prov
i
ded
f
or
a
ll
personne
l i
n
cl
u
d
i
ng
passengers
;
x
T
h
e
prov
i
ded
prote
c
t
i
ve
e
q
u
i
pment
i
s
to
be read
il
y
ava
il
ab
l
e
,
e
i
t
h
er
b
y
c
arr
y
i
ng
i
n
a
ded
ic
ated
po
u
c
h
or
l
o
c
ated and
ava
il
ab
l
e
at
c
onven
i
ent
pos
i
t
i
ons
aro
u
nd
t
h
e
vesse
l;
x
H
2
S i
s
e
x
treme
l
y
f
l
ammab
l
e
t
h
ere
f
ore
p
u
re
o
x
y
gen
resp
i
rators
shall never
be
u
sed
;
x
C
an
i
ster mas
k
s
or
c
artr
i
dge
resp
i
rators
are
not
ade
q
u
ate
or
approved
f
or
u
se
i
n
H
2
S
env
i
ronments
and
shall never
be
u
sed
;
x
T
ra
i
n
i
ng
shall
be
c
ond
u
c
ted
f
or
a
ll
personne
l
onboard
pr
i
or
to
an
y
engagement
i
n
k
no
w
n
H
2
S
areas
and
a
ll
personne
l
shall
be
f
am
ili
ar
w
i
t
h
t
h
e
u
se
o
f
and
an
y
li
m
i
tat
i
ons
o
f
t
h
e prov
i
ded e
q
u
i
pment
;
x
B
reat
h
i
ng
bott
l
es
should
on
l
y
ever
be
re
c
h
arged
u
s
i
ng
a
i
r
f
rom
a
ded
ic
ated
breat
h
i
ng
a
i
r
c
ompressor
or
f
rom
bott
l
ed
breat
h
i
ng a
i
r
. Ox
y
gen
or
a
i
r
f
rom
t
h
e
vesse
l’
s
a
i
r
s
y
stem
shall never
be
u
sed
.
4.
5
Wor
k
in
g
in
p
roxi
m
i
t
y
t
o an Ins
t
alla
t
ion
w
i
t
h
p
o
t
en
t
ial
H
2
S
x
O
ff
s
h
ore
i
nsta
ll
at
i
ons
operat
i
ng
wh
ere
t
h
ere
i
s
t
h
e
potent
i
a
l
f
or
H
2
S
h
ave
e
x
terna
l
w
arn
i
ng
a
l
arm
s
y
stems
i
n
p
l
a
c
e
to
i
n
f
orm
personne
l
o
f
an
y
H
2
S
es
c
ape
. U
s
u
a
ll
y
,
t
h
e
o
ff
s
h
ore
u
n
i
ts
w
ill
a
l
so
d
i
sp
l
a
y
s
i
gns
and not
ic
es
to
i
n
f
orm
vesse
l c
re
w
s
and
ot
h
er
persons
v
i
s
i
t
i
ng
t
h
e
u
n
i
t
l
o
c
at
i
on
;
x
A
ll
personne
l
onboard
shall
be are
a
w
are
o
f
,
and
u
nderstand
t
h
e mean
i
ng
o
f
,
t
h
ese
s
i
gns
and
a
l
arms
and
wh
at
a
c
t
i
on
to
ta
k
e
i
n
t
h
e event o
f
an
y
H
2
S
es
c
ape
;
x
V
esse
l
s
should
a
l
w
a
y
s
w
or
k
u
p
w
i
nd
o
f
an
y
poss
i
b
l
e
so
u
r
c
es
o
f
H
2
S
and
a
l
w
a
y
s
approa
c
h
k
no
w
n
or
s
u
spe
c
ted
H
2
S l
o
c
at
i
ons
w
i
t
h
c
a
u
t
i
on
a
f
ter
f
i
rst
c
h
e
cki
ng
w
i
t
h
t
h
e
OIM
t
h
at
i
t
i
s
sa
f
e
to
do
so
;
x
V
esse
l c
re
w
s
should
,
wh
erever
poss
i
b
l
e
,
w
or
k
as
a
team
and
avo
i
d
an
y
s
i
ng
l
e
person
w
or
ki
ng
a
l
one
i
n areas
t
h
at are
lik
e
l
y
to
c
ome
i
nto
c
onta
c
t
w
i
t
h h
i
g
h
c
on
c
entrat
i
on e
x
pos
u
re o
f
H
2
S.
4.
6
En
t
r
y
t
o an en
c
losed s
p
a
c
e
w
i
t
h
p
o
t
en
t
ial
H
2
S
x
R
e
f
eren
c
e
shall
be
made
to
t
h
e
P
erm
i
t
T
o
W
or
k # 4
E
n
cl
osed
S
pa
c
e
E
ntr
y
as
re
f
eren
c
ed
i
n t
h
e
Permit To Work
P
ro
c
ed
u
re
.
A
ll
entr
i
es
shall
be
c
orre
c
t
l
y
p
l
anned
and
i
mp
l
emented
w
i
t
h
re
f
eren
c
e
to
t
h
i
s
pro
c
ed
u
re
. T
h
ere
are no e
xc
ept
i
ons
.
V
ers
i
on
0
5
. O
r
i
g
i
na
l
date
:
2
5
/0
5
/
2
01
2
.
V
ers
i
on
date
:
3
1/1
2
/
2
01
5
.
V
a
li
d
vers
i
on
on
l
y
on
Q
M
S
s
i
te
. U
n
c
ontro
ll
ed do
c
u
ment
wh
en
pr
i
nted
.
P
ro
c
ed
u
re prepared b
y:
BOS
Q
HS
E
C
oord
i
nator
.
A
pproved
b
y:
BOS
Q
HS
E
Manager
.
V
a
li
dated
b
y:
BOS
Qu
a
li
t
y
R
epresentat
i
ve
6
/
7
788