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