1 tracer experiments barrio logan working draft do not cite or quote tony servin, p.e. shuming du,...
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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Working Draft Do Not Cite or Quote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Working Draft - Do Not Cite or Quote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
Working Draft - Do Not Cite or Quote
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
Working Draft - Do Not Cite or Quote
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
Direction(blowing from)
WRPLOT View 3.5 by Lakes Environmental Software - www.lakes-environmental.com
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
Direction(blowing from)
WRPLOT View 3.5 by Lakes Environmental Software - www.lakes-environmental.com
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)
Working Draft - Do Not Cite or Quote
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
Working Draft - Do Not Cite or Quote
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.
Working Draft - Do Not Cite or Quote
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
Working Draft - Do Not Cite or Quote
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
Working Draft - Do Not Cite or Quote
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
Working Draft - Do Not Cite or Quote
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