1 Tracer Experiments Barrio Logan Working Draft Do Not Cite or Quote Tony Servin, P.E. Shuming Du, Ph.D. Vlad Isakov, Ph.D. September 12, 2002 Air Resources

1

Tracer ExperimentsBarrio Logan

Working Draft Do Not Cite or Quote

Tony Servin, P.E.

Shuming Du, Ph.D.

Vlad Isakov, Ph.D.

September 12, 2002

Air Resources Board

California Environmental Protection Agency

2

General Location

Working Draft - Do Not Cite or Quote

•Lindbergh Field

•North Island

•Shipping Lane

•Logan Memorial

3

Tracer Experiment Purpose

• Develop a source-receptor relationship database

• Evaluate dispersion models for community health modeling

• Provide a recommendation for community health models and model options


4

The Experiment• SF6 tracer release (Summer & Winter)

– August 2001– December 2001

• 43 to 50 fixed sampling sites

• One mobile van continuous sampling

• Meteorological measurements– At the source– In receptor field

• Contract w/ UC Riverside


5

Tracer SF6 Release (1/2)

• UCR Student verifying SF6 flow

•Continuous Release: 7am to 8 pm

Draft

6

Tracer SF6 Release (2/2)

• SF6 released 5m above ground from PVC pipe

Draft

7

SF6 Release RateSummer (August 2001)

•SF6 released 9am to 8pm

•8/29 released from 3pm to 2am

02468

1012141618

(kg

/hr)

8/21 8/21 8/23 8/25 8/29 8/31Date

SF6 Release Rate

Draft

8

SF6 Release RateWinter (December 2001)

12

/17

12

/18

12

/19

12

/20

12

/21

02468

10121416

18

(kg

/hr)

Date

SF6 Release Rate - December 2001 - 7am to 8 pm

SF6 released 7am to 8pm

Draft

9

Fixed Bag Sampler, Residence

•Hourly SF6 sampling at 43 sites

•10 am to 6 pm

Draft

10

Tracer Release,NASSCO

Logan Memorial

Barrio Logan Source & ReceptorsAugust, 2001

Draft

11

Barrio Logan Source & Receptors December, 2001

Logan Memorial

Tracer Release

Draft

12

Mobile Sampler

Continuous SF6 sampling

Draft

13

Barrio Logan Source & Mobile Van Route, August 2001

Yellow dots -fixed samplers

Black lines - mobile vanpath

Draft

14

Vertical Array of Sonic Anemometers

•Logan Memorial Jr. High

•Surface winds and turbulence

Draft

15

Mini-SODAR (Logan Memorial)

Vertical profile of winds – u, WD,

Su, Sv, Sw

– range: 15m to 200m

– layer resolution: 5m

Draft

16

Sonic Anemometer• Sonic anemometer at release site

• Surface winds and turbulence

Draft

17

Summer sampling period (10 am to 8pm)

NASSCO Wind Roses

WIND ROSE PLOT

Station #72290 - , Summer Tracer Study (August 21, 23, 25, 31, 2001 10am - 8pm)

NORTH

SOUTH

WEST EAST

12%

24%

36%

48%

60%

Wind Speed (m/s)

> 11.06

8.49 - 11.06

5.40 - 8.49

3.34 - 5.40

1.80 - 3.34

0.51 - 1.80

COMPANY NAMEMODELER

PLOT YEAR-DATE-TIME

2001 Check Date Range Report10 AM - 8 PM

DATE

9/11/2002

DISPLAY

Wind Speed

UNIT

m/s

CALM WINDS

0.00%

AVG. WIND SPEED

2.26 m/s

COMMENTS

PROJECT/PLOT NO.

Figure __

ORIENTATION

Direction(blowing from)

WRPLOT View 3.5 by Lakes Environmental Software - www.lakes-environmental.com

WIND ROSE PLOT

Station #99999 - , Winter Tracer Study (December 17-21, 2001 10am - 6pm)

NORTH

SOUTH

WEST EAST

7%

14%

21%

28%

35%

Wind Speed (m/s)

> 11.06

8.49 - 11.06

5.40 - 8.49

3.34 - 5.40

1.80 - 3.34

0.51 - 1.80

COMPANY NAMEMODELER

PLOT YEAR-DATE-TIME

2001 Dec 17 - Dec 2110 AM - 6 PM

DATE

9/11/2002

DISPLAY

Wind Speed

UNIT

m/s

CALM WINDS

0.00%

AVG. WIND SPEED

2.19 m/s

COMMENTS

PROJECT/PLOT NO.

Figure __

ORIENTATION



WIND ROSE PLOT

Station #72290 - , Summer Data Night (August 29, 2001 3pm to midnight)

NORTH

SOUTH

WEST EAST

12%

24%

36%

48%

60%

Wind Speed (m/s)

> 11.06

8.49 - 11.06

5.40 - 8.49

3.34 - 5.40

1.80 - 3.34

0.51 - 1.80

COMPANY NAMEMODELER

PLOT YEAR-DATE-TIME

2001 Aug 29 - Aug 293 PM - 11 PM

DATE

9/11/2002

DISPLAY

Wind Speed

UNIT

m/s

CALM WINDS

0.00%

AVG. WIND SPEED

2.38 m/s

COMMENTS

PROJECT/PLOT NO.

Figure __

ORIENTATION



Draft

Summer sampling period (3pm to midnight)

Winter sampling period (10am to 6pm)

18

Observed SF6 (ppt) Dec. 19,

2001 (1pm)

487.25 487.50 487.75 488.00 488.25 488.50 488.75 489.00 489.25

3615.75

3616.00

3616.25

3616.50

3616.75

3617.00

3617.25

3617.50

3617.75

3618.00

3618.25

3618.50

401305060

240430

2780

50

2870

580170

2000 010

3040

2030

130160

160110

1310

1330

12101070

1760

1460

860390

130

330

780170

70

110

40

11

UTM Eastern (km )

UT

M N

orth

ern

(km

)

O bserved tracer concentration at hour 13, 12/19/2001

U nit o f concentration: ppt

source

Draft

19

Observed SF6 (ppt) Dec. 17,

2001 (3pm)

487.25 487.50 487.75 488.00 488.25 488.50 488.75 489.00 489.25

3615.75

3616.00

3616.25

3616.50

3616.75

3617.00

3617.25

3617.50

3617.75

3618.00

3618.25

3618.50

0 0010

10 10 10

10

0

010300

0 030200

540

0

070

200

10

0

1020

10

50

30

0

20

1370830

380

450

10

40

11

UTM Eastern (km )

UT

M N

orth

ern

(km

)

O bserved tracer concentration at hour 15, 12/17/2001

U nit o f concentration: ppt

source

Draft

20

Predicted vs Observed (AERMOD - Winter)

SF6, Paired Hourly Data

Draft

21

Barrio Logan Terrain Features (Calpuff)

4 8 6 . 5 4 8 7 4 8 7 . 5 4 8 8 4 8 8 . 5 4 8 9 4 8 9 . 5 4 9 0

3 6 1 6

3 6 1 6 . 5

3 6 1 7

3 6 1 7 . 5

3 6 1 8

3 6 1 8 . 5

3 6 1 9

3 6 1 9 . 5

2 34 5

6 7 8

9

1 0

1 11 21 3

1 4

1 51 61 71 81 9

2 02 1

2 22 3

2 4 2 52 6

2 7

2 82 9

3 03 1

3 23 3

3 43 5

3 63 7

3 8

3 94 0

4 14 2

4 3

4 5

Draft

22Working Draft - Do Not Cite or Quote4 86.5 4 87 4 87.5 4 88 4 88.5 4 89 4 89.5 4 90

36 16

36 16.5

36 17

36 17.5

36 18

36 18.5

36 19

36 19.5

2 345

6 7 8

9

10

11121314

1516171819

2021

2223

24 2526

27

282930

31

3233

3435

3637

38

3940

4142

43

45

-5

0.1

5

10

15

20

25

30

35

40

45

50

55

60

65

70

Ele va tion (m ete r)

S u rfa c e w in d a t h o u r 1 7 o n 1 2 /1 7 /2 0 0 1 .

UT

M N

orth

ern

(km

)

U TM Eas te rn (km)

CALMET Winds, December 17, 2001 (5pm)

23

CALPUFF Predictions, December 17, 2001 (5pm)


4 86.5 4 87 4 87.5 4 88 4 88.5 4 89 4 89.5 4 90

36 16

36 16.5

36 17

36 17.5

36 18

36 18.5

36 19

36 19.5

010000 020

0

0

010100

00101000

1010

0 00

0

00 0

10

10100

60

301410

60

10

1010

1 00

2 00

5 00

10 00

20 00

50 00

100 00

C ontour p lo t o f hourly concentra tion at hour 17 on 12/17/2001.

24

Predicted vs Observed (CALPUFF - Winter)

SF6, Paired Hourly Data


paired, without minisodar turbulence profile data

10

100

1000

10000

100000

10 100 1000 10000 100000obs (ppt)

pre

d (

pp

t)

25

• Micro-scale modeling may not adequately simulate dispersion in complex urban environments on a one-for-one hourly basis

• Tracer data may need further QA – e.g., 10 hours of 32 hours of winter

measurements show the peak concentration higher at 2 km from source rather than 1 km from source.


Possible Reasons for Scatter in Data

26

Screening of Tracer Data

• Need to screen observed data• Suggested criteria for screening

– Observation near limit of detection or saturation

– Siting and exposure criteria for each sampler– Equipment maintenance history– Potential of tampering by curious public or

domestic animals


27

Tracer Experiment Summary

• Develop a source-receptor relationship database– Screen and stratify data

• Evaluate dispersion models for community health modeling

• Provide a recommendation for community health models and model options


28

Future Work

• Screen and stratify tracer data

• Screen and stratify meteorological data for consistency with plume centerline observations

• Recommend model and model options for microscale modeling for community health


Documents

1 Tracer Experiments Barrio Logan Working Draft Do Not Cite or Quote Tony Servin, P.E. Shuming Du, Ph.D. Vlad Isakov, Ph.D. September 12, 2002 Air Resources