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[
6
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.
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dd
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[
7
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da
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[
8
]
.
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ga
s
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Coll
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of
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ge
n
d:
A
=
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De
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e
a
d
t
h
e
a
bs
o
r
b
a
n
c
e
us
i
n
g
s
p
e
c
t
r
o
ph
oto
m
e
t
e
r
a
t
530
n
m
.
3.
RE
S
UL
T
S
A
ND
AN
AL
YSI
S
3.
1.
T
h
e
L
e
ve
l
o
f
H
2
S
F
r
o
m
t
h
e
r
e
s
u
l
t
s
o
f
H
2
S
de
t
e
r
m
i
na
t
i
o
n
,
i
t
wa
s
f
o
un
d
t
h
a
t
t
h
e
l
e
v
e
l
o
f
H
2
S
a
r
o
un
d
S
uka
w
i
na
t
a
n
L
a
n
d
f
il
l
S
i
t
e
wa
s
hi
g
h
e
r
t
h
a
n
t
h
a
t
a
r
o
un
d
Ga
n
dus
R
ubbe
r
F
a
c
t
or
y
.
T
h
e
de
t
a
i
l
s
o
f
r
e
s
u
l
t
s
i
s
s
h
o
wn
i
n
T
a
bl
e
1.
T
a
bl
e
1.
T
h
e
L
e
v
e
l
o
f
H
2
S
i
n
Ga
n
du
s
R
u
bb
e
r
F
a
c
t
o
r
y
a
n
d
S
uka
w
i
na
t
a
n
L
a
n
d
f
il
l
S
i
t
e
G
a
ndus
R
ubbe
r
F
a
c
t
o
r
y
(
pp
m)
S
uka
w
in
a
ta
n L
a
nd
f
il
l
S
it
e
(
ppm)
T
h
r
e
s
ho
ld
L
e
ve
l
(
ppm)
0.332
0
.
4
82
0
.
02
B
a
s
e
d
o
n
t
h
e
r
e
s
u
l
t
s
o
f
s
t
ud
y
,
i
t
wa
s
f
o
un
d
t
h
a
t
th
e
l
e
v
e
l
s
o
f
H
2
S
i
n
Ga
n
du
s
R
u
bb
e
r
F
a
c
t
o
r
y
a
nd
S
uka
w
i
n
a
t
a
n
L
a
n
d
f
il
l
S
i
t
e
we
r
e
0.
332
ppm
a
n
d
0.
482
ppm
,
r
e
s
pe
c
t
i
v
e
ly
.
T
h
e
s
e
r
e
s
u
l
t
s
we
r
e
16
a
n
d
24
t
i
m
e
s
hi
g
h
e
r
t
h
a
n
t
h
e
t
h
r
e
s
h
o
l
d
l
e
v
e
l
o
f
H
2
S
.
T
h
e
l
e
ve
l
o
f
H
2
S
i
n
S
uka
w
i
na
t
a
n
L
a
n
d
f
il
l
S
i
t
e
wa
s
hi
g
h
e
r
t
h
a
n
t
h
a
t
i
n
Ga
n
du
s
R
u
bb
e
r
F
a
c
t
o
r
y
.
T
hi
s
mi
g
h
t
b
e
a
s
s
u
m
e
d
t
h
a
t
ga
r
b
a
ge
m
a
na
ge
m
e
n
t
s
y
s
t
e
m
i
n
S
uka
w
i
na
t
a
n
L
a
n
d
f
il
l
S
i
t
e
wa
s
o
pe
n
dum
p
i
ng.
O
pe
n
du
m
p
i
ng
i
s
c
o
m
m
o
n
t
o
us
e
a
s
wa
s
t
e
d
i
s
po
s
a
l
s
y
s
t
e
m
i
n
de
ve
l
o
p
i
n
g
c
o
un
t
r
i
e
s
.
T
hi
s
h
a
s
s
o
m
e
t
hi
n
g
t
o
d
o
wi
t
h
t
h
e
l
a
c
k
o
f
f
i
na
nc
e
f
o
r
a
n
d
tr
a
i
ne
d
h
u
m
a
n
r
e
s
o
ur
c
e
s
i
n
wa
s
t
e
di
s
po
s
a
l
m
a
n
a
ge
m
e
n
t
.
Ope
n
du
m
p
i
ng
i
s
t
h
e
d
i
s
po
s
a
l
o
f
wa
s
t
e
i
n
a
l
o
c
a
t
i
o
n
w
i
t
h
o
ut
gi
v
e
n
a
ny
s
pe
c
i
a
l
t
r
e
a
t
m
e
n
t
s
.
T
hi
s
o
pe
n
du
m
p
i
ng
s
y
s
t
e
m
c
a
n
c
o
n
t
a
m
i
na
t
e
e
nvi
r
o
nm
e
n
t
i
n
t
he
f
o
r
m
o
f
a
i
r
po
l
l
ut
i
o
n
.
I
t
i
s
u
n
de
r
s
too
d
why
t
he
a
i
r
a
r
o
un
d
S
uka
w
i
n
a
t
a
n
L
a
n
d
f
il
l
S
i
t
e
wa
s
c
o
n
t
a
m
i
na
t
e
d
wi
t
h
H
2
S
a
n
d
u
n
p
l
e
a
s
a
n
t
s
m
e
ll
s
.
Ope
n
du
m
p
i
ng
c
a
n
be
c
o
m
e
t
h
e
s
o
ur
c
e
o
f
d
i
s
e
a
s
e
v
e
c
t
o
r
de
v
e
l
o
p
m
e
n
t
(
s
uc
h
a
s
f
li
e
s
,
mi
c
e
,
c
o
c
kr
o
a
c
h
e
s
)
,
s
pr
e
a
d
u
n
p
l
e
a
s
a
n
t
o
d
o
r
,
c
o
n
t
a
m
i
na
t
e
s
ur
r
o
un
d
i
n
g
a
i
r
a
n
d
s
ur
f
a
c
e
a
n
d
gr
o
u
n
d
wa
t
e
r
,
tr
i
gg
e
r
a
f
i
r
e
h
a
z
a
r
d,
a
n
d
c
r
e
a
t
e
pr
o
l
o
n
g
e
d
h
e
a
vy
s
m
o
ke
o
f
f
i
r
e
[
9
].
B
e
c
a
us
e
o
pe
n
du
m
p
i
ng
i
s
hi
g
hly
po
t
e
n
t
i
a
l
i
n
c
o
n
t
a
m
in
a
t
i
n
g
t
h
e
e
nvi
r
o
nm
e
n
t
,
wa
s
t
e
di
s
po
s
a
l
s
y
s
t
e
m
us
i
n
g
o
pe
n
du
m
p
i
n
g
m
u
s
t
b
e
l
o
c
a
t
e
d
v
e
r
y
f
a
r
a
wa
y
f
r
o
m
ur
b
a
n
s
e
t
t
l
e
m
e
n
t
s
a
n
d
l
a
i
d
o
n
a
r
e
l
a
t
i
v
e
ly
w
i
de
l
a
n
d.
L
a
n
d
f
il
l
s
i
t
e
o
f
S
uka
w
i
na
t
a
n
wa
s
o
r
i
g
i
na
ll
y
l
o
c
a
t
e
d
f
a
r
a
wa
y
f
r
o
m
do
wn
t
o
wn
.
F
o
l
l
o
w
i
n
g
t
he
gr
o
wi
ng
n
u
m
be
r
o
f
pe
o
pl
e
,
t
h
e
a
r
e
a
n
e
a
r
t
h
e
l
a
n
d
f
il
l
s
i
t
e
wa
s
gr
a
d
ua
l
ly
s
e
t
t
l
e
d
a
n
d
m
u
c
h
h
o
us
i
ng
is
de
ve
l
o
pe
d.
B
a
s
e
d
o
n
t
h
e
pr
e
l
im
i
na
r
y
s
t
ud
i
e
s
,
i
t
wa
s
f
o
u
n
d
t
h
a
t
a
t
t
h
e
b
e
g
i
nn
i
ng
o
f
s
e
t
t
l
e
m
e
n
t
i
n
S
uka
w
i
na
t
a
n
pe
o
p
l
e
f
e
l
t
a
nn
o
y
e
d
w
i
t
h
t
h
e
a
i
r
po
l
l
ut
i
o
n
.
Ho
we
v
e
r
,
a
f
t
e
r
s
e
t
t
l
i
ng
i
n
a
l
o
ng
t
i
m
e
pe
o
p
l
e
a
r
e
a
c
c
u
s
to
m
e
d
t
o
l
i
v
i
ng
w
i
t
h
H
2
S
f
r
o
m
a
i
r
po
l
l
ut
i
o
n
.
H
y
dr
o
ge
n
s
u
lf
i
d
e
i
s
c
o
l
o
r
l
e
s
s
ga
s
,
hi
g
hly
t
o
xi
c
,
f
l
a
mm
a
bl
e
,
a
n
d
h
a
s
s
pe
c
if
i
c
o
d
o
r
a
s
f
o
un
d
i
n
de
c
a
y
e
d
e
ggs
.
T
hi
s
pu
n
ge
n
t
s
m
e
ll
c
a
n
b
e
de
t
e
c
t
e
d
if
t
h
e
l
e
ve
l
o
f
H
2
S
i
s
≥
0.
13
pp
m
[
10
].
H
2
S
a
t
0
.
05
pp
m
c
a
n
o
nl
y
s
pr
e
a
d
i
t
s
o
do
r
a
n
d
a
t
0
.
1
ppm
c
a
us
e
s
i
r
r
i
t
a
t
i
o
n
s
a
n
d
l
a
c
k
o
f
s
e
ns
o
r
y
t
a
s
t
e
.
Af
t
e
r
b
e
i
ng
e
x
po
s
e
d
to
t
h
e
l
e
v
e
l
a
b
o
ve
50
pp
m
,
t
h
e
s
ym
pt
o
m
s
w
il
l
b
e
gr
a
dua
l
ly
wo
r
s
e
,
pa
i
nf
u
l
c
o
nj
u
n
c
t
i
vi
t
i
s
,
he
a
da
c
h
e
,
a
n
o
s
m
i
a
,
n
a
u
s
e
a
,
c
o
ugh
,
s
o
r
e
t
h
r
o
a
t
,
a
n
d
pu
l
m
o
n
a
r
y
e
de
m
a
.
F
ur
t
h
e
r
m
o
r
e
,
a
t
500
ppm
H
2
S
w
i
ll
c
a
u
s
e
s
udde
n
l
o
s
s
o
f
c
o
n
s
c
i
o
us
n
e
s
s
,
b
r
e
a
t
hi
ng
d
e
pr
e
s
s
i
o
n
,
a
n
d
t
h
e
i
nd
i
v
i
dua
l
w
il
l
d
i
e
i
n
30
-
60
mi
nut
e
s
[
11
].
H
y
dr
o
ge
n
s
u
l
f
i
d
e
(H
2
S
)
i
n
l
a
n
d
f
il
l
g
a
s
,
f
o
r
m
e
d
w
i
t
h
t
h
e
bi
o
d
e
gr
a
da
t
i
o
n
o
f
m
u
ni
c
i
pa
l
s
o
l
i
d
wa
s
t
e
,
i
s
a
m
a
j
o
r
o
d
o
r
o
us
c
om
po
n
e
n
t
i
n
a
l
a
n
d
f
il
l
.
I
t
p
o
s
e
s
a
po
t
e
n
t
i
a
l
r
i
s
k
to
h
u
m
a
n
s
a
n
d
c
a
us
e
s
o
do
r
p
r
o
bl
e
m
s
a
n
d
c
o
m
p
l
a
i
n
t
s
by
t
h
e
r
e
s
i
de
n
t
s
n
e
a
r
l
a
n
d
f
il
l
s
[
12
].
R
e
c
e
n
t
s
t
udi
e
s
ha
v
e
i
m
p
li
c
a
t
e
d
t
h
a
t
H
2
S
i
s
i
nv
o
l
ve
d
i
n
p
hy
s
i
o
l
o
g
i
c
a
l
a
n
d
pa
t
ho
l
o
g
i
c
a
l
pr
o
c
e
s
s
e
s
o
f
m
a
ny
d
i
s
e
a
s
e
s
,
i
n
c
l
ud
i
ng
c
a
r
d
i
o
v
a
s
c
u
l
a
r
,
r
e
s
p
i
r
a
t
or
y
,
ne
r
v
o
us
a
n
d
e
n
do
c
r
i
n
e
s
y
s
t
e
m
s
[
13
]
.
T
h
e
r
e
s
u
l
t
s
o
f
t
hi
s
s
t
ud
y
a
r
e
i
n
li
ne
w
i
t
h
t
h
o
s
e
o
f
M
a
r
d
i
a
ni
(
2006)
.
S
h
e
f
o
un
d
t
h
a
t
t
h
e
l
e
ve
l
o
f
H
2
S
ga
s
e
x
c
e
e
de
d
a
t
h
r
e
s
h
o
l
d
l
e
ve
l
i
n
r
a
d
i
us
o
f
25
m
e
t
e
r
s
f
r
o
m
l
a
n
d
f
il
l
s
i
t
e
[
14
]
.
I
n
a
dd
i
t
i
o
n
,
a
s
t
udy
o
f
M
e
i
r
i
nda
(
2008)
i
n
d
i
c
a
t
e
d
t
h
a
t
H
2
S
l
e
v
e
l
i
n
l
a
n
d
f
il
l
o
f
S
a
m
pa
h
T
e
r
j
u
n
K
e
c
a
m
a
t
a
n
M
e
da
n
M
a
r
e
l
a
n
wa
s
a
b
o
v
e
m
a
xim
u
m
l
e
v
e
l
a
s
r
e
gu
l
a
t
e
d
i
n
a
de
c
r
e
e
o
f
e
nvi
r
o
nm
e
n
t
a
l
h
e
a
l
t
h
mi
n
i
s
t
r
y
No
.
K
E
P
-
50/M
E
NL
H/
11/1996
a
b
o
ut
Od
o
r
S
t
a
n
da
r
d
[
15
]
.
T
h
e
r
e
s
u
l
t
s
o
f
e
nvi
r
o
nm
e
n
t
a
l
im
pa
c
t
a
na
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.
RE
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J
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art
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,
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[1
2
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o
J
.
H
.
,
et
a
l
.
,
“
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,
A
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rl
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n
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g
a
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rs
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t
y
,
2006
.
[1
5
]
Me
ri
n
d
a
,
“
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e
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.
[1
6
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,
2003
.
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cce
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A
p
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2016.
[1
7
]
D
el
fi
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o
R
.
J
.
,
et
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l
.
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“
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9
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.
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.
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h
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