724/ Permit to Work / 992
P
er
m
it to
W
or
k
BOS-
P
RD-0
3
.900902
4
.
7
.1
V
e
n
til
a
ti
n
g
an
e
nc
lo
s
e
d
spac
e
N
o
en
cl
osed
spa
c
e
shall
be
entered
u
n
l
ess
f
or
c
ed
vent
il
at
i
on
h
as
been
c
ond
u
c
ted and
t
h
e
atmosp
h
ere
tested
sa
f
e
f
or
entr
y:
x
N
at
u
ra
l
vent
il
at
i
on
i
s
not
ade
q
u
ate
to a
c
h
i
eve
sa
f
e atmosp
h
ere
l
eve
l
s
;
x
S
pa
c
es
be
i
ng
vent
il
ated
shall
h
ave
a m
i
n
i
m
u
m
,
o
f
t
w
o
open
i
ngs
to
ens
u
re
t
h
at
a
i
r
be
i
ng
d
i
spe
ll
ed
i
s
done
so e
ff
e
c
t
i
ve
l
y
. I
f
not
t
h
e
vent
il
at
i
on pro
c
ess
w
ill
not be
e
ff
e
c
t
i
ve
;
x
A
s
a
g
u
i
de
,
f
or
an
y
ba
ll
ast
or
an
y
tan
k
t
h
at
c
onta
i
n
or
h
as
c
onta
i
ned
on
l
y
potab
l
e
w
ater
,
t
h
e
vo
l
u
me
o
f
a
i
r
i
n
t
h
e
spa
c
e
shall
be
c
h
anged
at
l
east
t
h
ree
t
i
mes
pr
i
or
to
entr
y
. F
or
e
x
amp
l
e
,
a
spa
c
e
w
i
t
h
a
vo
l
u
me
o
f
1
00
m
3
shall
h
ave
3
00
m
3
o
f
a
i
r
e
xc
h
ange
. Wi
t
h
a
b
l
o
w
er
c
apa
ci
t
y
o
f
1
00
m
3
/h
o
u
r
,
t
h
e
spa
c
e
shall
be
vent
il
ated
f
or
at
l
east
t
h
ree
h
o
u
rs
;
x
F
or
a
ll
tan
k
s
t
h
at
c
onta
i
n and
/
or
h
ave
c
onta
i
ned
h
a
z
ardo
u
s
s
u
bstan
c
es and
hy
dro
c
arbons
,
proper
vent
il
at
i
on
pr
i
or
to
cl
ean
i
ng
shall
be
per
f
ormed
and
vent
il
at
i
on
shall
rea
c
h
t
h
e
c
on
f
i
ned
spa
c
e
bottom
;
x
W
h
il
e
personne
l
rema
i
n
i
n
a
tan
k
or
c
ompartment
,
vent
il
at
i
on
shall
be
c
ont
i
n
u
o
u
s
and
f
re
q
u
ent
atmosp
h
ere
tests
shall
be
ta
k
en
.
W
he
n
ve
n
til
a
ti
n
g
spac
e
s
suc
h
as
c
h
a
i
n
lo
ck
er
s
and
voi
d
spac
e
s w
here there
w
ill
b
e r
us
ti
n
g
o
f
s
teel
w
or
k,
o
x
y
g
e
n
level
s
i
n
the
spac
e
w
ill
b
e
c
o
ns
i
d
er
ab
ly re
duc
e
d
. Level
s
o
f
le
ss
th
an
10
%
w
ill
caus
e
i
mm
e
d
i
a
te
d
e
a
th.
4
.
7
.
2 T
e
s
ti
n
g
the
a
t
m
o
sp
here
H
y
dro
c
arbon
V
apo
u
r
N
o more
t
h
an
1
% L
E
L.
Ox
y
gen
N
o
l
o
w
er
t
h
an
20%
and
no
h
i
g
h
er
t
h
an
2
1
%
b
y
vo
l
u
me
.
C
arbon Mono
xi
de
(C
o
)
L
o
w
er
t
h
an
3
5
ppm
.
H
y
drogen
S
u
l
p
h
i
de
(H2S)
L
o
w
er
t
h
an
1
0
ppm
.
T
h
e en
cl
osed spa
c
e
shall
on
l
y
be
entered
a
f
ter
t
h
e
f
o
ll
o
w
i
ng
sa
f
et
y
meas
u
res
h
ave been
ta
k
en
:
x
T
h
e
c
ompetent
person respons
i
b
l
e
f
or
operat
i
on
and
ma
i
ntenan
c
e
o
f
t
h
e
m
u
l
t
i-
gas
dete
c
tor
shall
ens
u
re
t
h
at
t
h
e e
q
u
i
pment
i
n
u
se
i
s
c
ert
i
f
i
ed
as
c
a
li
brated and
c
h
e
ck
ed
;
x
W
h
ere appropr
i
ate
t
h
e
c
ompetent person
shall
c
a
li
brate
t
h
e
e
q
u
i
pment be
f
ore
u
se
;
x
R
epresentat
i
ve
samp
l
es
o
f
a
c
ross
se
c
t
i
on
o
f
t
h
e
atmosp
h
ere
i
n
t
h
e
spa
c
e
shall
be
ta
k
en
at
var
i
o
u
s
l
eve
l
s
(
h
i
g
h
, l
o
w
and med
i
u
m
)
u
s
i
ng
an
e
x
tens
i
on
probe
dev
ic
e
t
h
ro
u
g
h
as man
y
de
ck
open
i
ngs
as
i
s
pra
c
t
ic
a
l. T
ests
shall
on
l
y
be
c
arr
i
ed o
u
t
f
rom
o
u
ts
i
de
t
h
e
spa
c
e
;
x
W
h
en
tests
are
be
i
ng
c
arr
i
ed
o
u
t
,
vent
il
at
i
on
shall
be
stopped
and
a
per
i
od
o
f
abo
u
t
1
0
m
i
n
u
tes
a
ll
o
w
ed
to
l
apse be
f
ore
read
i
ngs
are
ta
k
en
;
x
T
est
i
ng
shall
be
repeated
at
reg
u
l
ar
i
nterva
l
s
(
abo
u
t
ever
y
h
o
u
r
)
d
u
r
i
ng
t
h
e
per
i
od
personne
l
are
w
i
t
h
i
n
t
h
e
spa
c
e and
re
c
orded on
t
h
e
PTW
;
x
A
fu
ll
range
o
f
tests
shall
be
u
nderta
k
en
i
f
t
h
ere
i
s
an
y
s
u
sp
ici
on
o
f
c
h
ang
i
ng
ci
r
c
u
mstan
c
es or
i
f
t
h
ere
h
as
been
a brea
k i
n
t
h
e
w
or
k;
x
W
h
en
tests
h
ave
s
h
o
w
n
a
tan
k
or
c
ompartment
to
be
sa
f
e
f
or
entr
y
,
po
ck
ets
o
f
gas
shall
a
l
w
a
y
s
be
s
u
spe
c
ted
,
and
regenerat
i
on
o
f
hy
dro
c
arbon
gas
shall
a
l
w
a
y
s
be
c
ons
i
dered
poss
i
b
l
e
,
even
a
f
ter
l
oose
s
c
a
l
e
h
as
been
removed
;
x
U
se
o
f
persona
l
dete
c
tors
c
apab
l
e
o
f
c
ont
i
n
u
o
u
s
l
y
mon
i
tor
i
ng
t
h
e
presen
c
e
o
f
hy
dro
c
arbon
vapo
u
r
,
t
h
e
o
x
y
gen
c
ontent
o
f
t
h
e
atmosp
h
ere
,
and
, i
f
appropr
i
ate
,
to
xic
vapo
u
r
,
shall
be
c
arr
i
ed
b
y
personne
l i
n
t
h
e
spa
c
e at
a
ll
t
i
mes
;
x
I
f
c
ons
i
dered
ne
c
essar
y
,
re
q
u
est
add
i
t
i
ona
l
ass
i
stan
c
e
wh
en
test
i
ng
atmosp
h
ere
,
s
u
c
h
as
f
rom
a
C
h
em
i
st or
ot
h
er
pro
f
ess
i
ona
l
bod
y
.
V
ers
i
on
0
5
. O
r
i
g
i
na
l
date
:
2
5
/
0
5
/
20
1
2.
V
ers
i
on date
:
31/1
2
/
20
1
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
.
8
/ 17
724