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Grand Bay Episode March 6,
2007
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 6 March 7
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 6 March 7
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
05
:30
AM
07
:30
AM
09
:30
AM
11:3
0 A
M
01
:30
PM
03
:30
PM
05
:30
PM
07
:30
PM
09
:30
PM
11:3
0 P
M
01
:30
AM
03
:30
AM
05
:30
AM
0
50
100
150
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
March 7March 6
additional information regarding this episode
Back trajectories simulated with the NOAA HYSPLIT model using meteorological on a 12 km grid
Trajectories started from the Grand Bay site (marked with a star on the map) at 5 different heights representing different positions in the mixed layer (0.1, 0.3, 0.5, 0.7, 0.9)
Note that the times are represented in UTC (Universal Time Coordinate) which is 6 hours later than Central Standard Time, e.g., 20 UTC = 14:00 Central Standard Time
Large mercury emissions sources are indicated on the map, including:
Wtsn = Watson coal-fired power plant FChm = First Chemical hazardous waste incin /
Chevron refinery PsIn = Pascagoula municipal waste
incinerator Brry = Barry coal fired power plants Danl = Daniel coal fired power plant Hlnm = Holnam cement plant Intl = International Paper ScIt = Scott Paper and International Paper
Additional trajectories immediately before period shown in slides above
Grand Bay “Episode” March 14, 2007
(very low concentrations)
14-Mar-07 15-Mar-07
11:3
0 P
M
01:3
0 A
M
03:3
0 A
M
05:3
0 A
M
07:3
0 A
M
09:3
0 A
M
11:3
0 A
M
01:3
0 P
M
03:3
0 P
M
05:3
0 P
M
07:3
0 P
M
09:3
0 P
M
11:3
0 P
M
01:3
0 A
M
0
10
20
30
40
50
GE
M
(ng/
m3
- 1.
5) *
10
RG
M a
nd F
PM
(pg
/m3) RGM
FPM
GEM
18-Nov-06
12
:30
AM
02
:30
AM
04
:30
AM
06
:30
AM
08
:30
AM
10
:30
AM
12
:30
PM
02
:30
PM
04
:30
PM
06
:30
PM
08
:30
PM
10
:30
PM
010203040506070
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
Grand Bay Episode
Nov 18, 2006
18-Nov-06
12
:30
AM
02
:30
AM
04
:30
AM
06
:30
AM
08
:30
AM
10
:30
AM
12
:30
PM
02
:30
PM
04
:30
PM
06
:30
PM
08
:30
PM
10
:30
PM
010203040506070
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
18-Nov-06
12
:30
AM
02
:30
AM
04
:30
AM
06
:30
AM
08
:30
AM
10
:30
AM
12
:30
PM
02
:30
PM
04
:30
PM
06
:30
PM
08
:30
PM
10
:30
PM
010203040506070
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
18-Nov-06
12
:30
AM
02
:30
AM
04
:30
AM
06
:30
AM
08
:30
AM
10
:30
AM
12
:30
PM
02
:30
PM
04
:30
PM
06
:30
PM
08
:30
PM
10
:30
PM
010203040506070
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
18-Nov-06
12
:30
AM
02
:30
AM
04
:30
AM
06
:30
AM
08
:30
AM
10
:30
AM
12
:30
PM
02
:30
PM
04
:30
PM
06
:30
PM
08
:30
PM
10
:30
PM
010203040506070
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
18-Nov-06
12
:30
AM
02
:30
AM
04
:30
AM
06
:30
AM
08
:30
AM
10
:30
AM
12
:30
PM
02
:30
PM
04
:30
PM
06
:30
PM
08
:30
PM
10
:30
PM
010203040506070
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
18-Nov-06
12
:30
AM
02
:30
AM
04
:30
AM
06
:30
AM
08
:30
AM
10
:30
AM
12
:30
PM
02
:30
PM
04
:30
PM
06
:30
PM
08
:30
PM
10
:30
PM
010203040506070
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
18-Nov-06
12
:30
AM
02
:30
AM
04
:30
AM
06
:30
AM
08
:30
AM
10
:30
AM
12
:30
PM
02
:30
PM
04
:30
PM
06
:30
PM
08
:30
PM
10
:30
PM
010203040506070
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
18-Nov-06
12
:30
AM
02
:30
AM
04
:30
AM
06
:30
AM
08
:30
AM
10
:30
AM
12
:30
PM
02
:30
PM
04
:30
PM
06
:30
PM
08
:30
PM
10
:30
PM
010203040506070
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
18-Nov-06
12
:30
AM
02
:30
AM
04
:30
AM
06
:30
AM
08
:30
AM
10
:30
AM
12
:30
PM
02
:30
PM
04
:30
PM
06
:30
PM
08
:30
PM
10
:30
PM
010203040506070
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
18-Nov-06
12
:30
AM
02
:30
AM
04
:30
AM
06
:30
AM
08
:30
AM
10
:30
AM
12
:30
PM
02
:30
PM
04
:30
PM
06
:30
PM
08
:30
PM
10
:30
PM
010203040506070
GE
M
(ng
/m3
- 1
.5)
* 1
0R
GM
an
d F
PM
(p
g/m
3)
RGM
FPM
GEM
additional information regarding this episode
Back trajectories simulated with the NOAA HYSPLIT model using meteorological on a 12 km grid
Trajectories started from the Grand Bay site (marked with a star on the map) at 5 different heights representing different positions in the mixed layer (0.1, 0.3, 0.5, 0.7, 0.9)
Note that the times are represented in UTC (Universal Time Coordinate) which is 6 hours later than Central Standard Time, e.g., 20 UTC = 14:00 Central Standard Time
Large mercury emissions sources are indicated on the map, including:
Wtsn = Watson coal-fired power plant FChm = First Chemical hazardous waste incin /
Chevron refinery PsIn = Pascagoula municipal waste
incinerator Brry = Barry coal fired power plants Danl = Daniel coal fired power plant Hlnm = Holnam cement plant Intl = International Paper ScIt = Scott Paper and International Paper
Additional trajectories immediately before period shown in slides above
Additional trajectories immediately after period shown in slides above
Grand Bay Episode March 7,
2007
08-Mar-07
03:3
0 A
M
05:3
0 A
M
07:3
0 A
M
09:3
0 A
M
11:3
0 A
M
01:3
0 P
M
03:3
0 P
M
05:3
0 P
M
07:3
0 P
M
09:3
0 P
M
11:3
0 P
M
01:3
0 A
M
03:3
0 A
M
0
10
20
30
40
50
60
70
GE
M
(ng/
m3
- 1.
5) *
10
RG
M a
nd F
PM
(pg
/m3) RGM
FPM
GEM
08-Mar-07
03:3
0 A
M
05:3
0 A
M
07:3
0 A
M
09:3
0 A
M
11:3
0 A
M
01:3
0 P
M
03:3
0 P
M
05:3
0 P
M
07:3
0 P
M
09:3
0 P
M
11:3
0 P
M
01:3
0 A
M
03:3
0 A
M
0
10
20
30
40
50
60
70
GE
M
(ng/
m3
- 1.
5) *
10
RG
M a
nd F
PM
(pg
/m3) RGM
FPM
GEM
08-Mar-07
03:3
0 A
M
05:3
0 A
M
07:3
0 A
M
09:3
0 A
M
11:3
0 A
M
01:3
0 P
M
03:3
0 P
M
05:3
0 P
M
07:3
0 P
M
09:3
0 P
M
11:3
0 P
M
01:3
0 A
M
03:3
0 A
M
0
10
20
30
40
50
60
70
GE
M
(ng/
m3
- 1.
5) *
10
RG
M a
nd F
PM
(pg
/m3) RGM
FPM
GEM
08-Mar-07
03:3
0 A
M
05:3
0 A
M
07:3
0 A
M
09:3
0 A
M
11:3
0 A
M
01:3
0 P
M
03:3
0 P
M
05:3
0 P
M
07:3
0 P
M
09:3
0 P
M
11:3
0 P
M
01:3
0 A
M
03:3
0 A
M
0
10
20
30
40
50
60
70
GE
M
(ng/
m3
- 1.
5) *
10
RG
M a
nd F
PM
(pg
/m3) RGM
FPM
GEM
08-Mar-07
03:3
0 A
M
05:3
0 A
M
07:3
0 A
M
09:3
0 A
M
11:3
0 A
M
01:3
0 P
M
03:3
0 P
M
05:3
0 P
M
07:3
0 P
M
09:3
0 P
M
11:3
0 P
M
01:3
0 A
M
03:3
0 A
M
0
10
20
30
40
50
60
70
GE
M
(ng/
m3
- 1.
5) *
10
RG
M a
nd F
PM
(pg
/m3) RGM
FPM
GEM
08-Mar-07
03:3
0 A
M
05:3
0 A
M
07:3
0 A
M
09:3
0 A
M
11:3
0 A
M
01:3
0 P
M
03:3
0 P
M
05:3
0 P
M
07:3
0 P
M
09:3
0 P
M
11:3
0 P
M
01:3
0 A
M
03:3
0 A
M
0
10
20
30
40
50
60
70
GE
M
(ng/
m3
- 1.
5) *
10
RG
M a
nd F
PM
(pg
/m3) RGM
FPM
GEM
08-Mar-07
03:3
0 A
M
05:3
0 A
M
07:3
0 A
M
09:3
0 A
M
11:3
0 A
M
01:3
0 P
M
03:3
0 P
M
05:3
0 P
M
07:3
0 P
M
09:3
0 P
M
11:3
0 P
M
01:3
0 A
M
03:3
0 A
M
0
10
20
30
40
50
60
70
GE
M
(ng/
m3
- 1.
5) *
10
RG
M a
nd F
PM
(pg
/m3) RGM
FPM
GEM
08-Mar-07
03:3
0 A
M
05:3
0 A
M
07:3
0 A
M
09:3
0 A
M
11:3
0 A
M
01:3
0 P
M
03:3
0 P
M
05:3
0 P
M
07:3
0 P
M
09:3
0 P
M
11:3
0 P
M
01:3
0 A
M
03:3
0 A
M
0
10
20
30
40
50
60
70
GE
M
(ng/
m3
- 1.
5) *
10
RG
M a
nd F
PM
(pg
/m3) RGM
FPM
GEM
08-Mar-07
03:3
0 A
M
05:3
0 A
M
07:3
0 A
M
09:3
0 A
M
11:3
0 A
M
01:3
0 P
M
03:3
0 P
M
05:3
0 P
M
07:3
0 P
M
09:3
0 P
M
11:3
0 P
M
01:3
0 A
M
03:3
0 A
M
0
10
20
30
40
50
60
70
GE
M
(ng/
m3
- 1.
5) *
10
RG
M a
nd F
PM
(pg
/m3) RGM
FPM
GEM
08-Mar-07
03:3
0 A
M
05:3
0 A
M
07:3
0 A
M
09:3
0 A
M
11:3
0 A
M
01:3
0 P
M
03:3
0 P
M
05:3
0 P
M
07:3
0 P
M
09:3
0 P
M
11:3
0 P
M
01:3
0 A
M
03:3
0 A
M
0
10
20
30
40
50
60
70
GE
M
(ng/
m3
- 1.
5) *
10
RG
M a
nd F
PM
(pg
/m3) RGM
FPM
GEM