atmospheric mercury in the guadalupe watershed andy lincoff peter husby barbara bates us epa region...
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Atmospheric Mercury in Atmospheric Mercury in the Guadalupe the Guadalupe WatershedWatershed
Andy LincoffAndy Lincoff
Peter HusbyPeter Husby
Barbara BatesBarbara Bates
US EPA Region 9 LaboratoryUS EPA Region 9 Laboratory
Richmond, CARichmond, CA
What I Will Cover……..What I Will Cover……..
Description of USEPA R9 Laboratory Hg Description of USEPA R9 Laboratory Hg TrailerTrailer
Description of Total, Speciation and Description of Total, Speciation and Particulate Hg analysisParticulate Hg analysis
Mercury Monitoring Associated with a Mercury Monitoring Associated with a remediation site near the USEPA R9 remediation site near the USEPA R9 LaboratoryLaboratory
Atmospheric Mercury Speciation in Atmospheric Mercury Speciation in Guadalupe WatershedGuadalupe Watershed
Atmospheric Mercury Vapor Atmospheric Mercury Vapor Monitoring InstrumentationMonitoring Instrumentation Tekran Model 2537ATekran Model 2537A Continuous Analysis Continuous Analysis
of total gaseous Hgof total gaseous Hg Sub ng/m3 (ppt & Sub ng/m3 (ppt &
ppq) levels measuredppq) levels measured Detection with Cold Detection with Cold
Vapor Atomic Vapor Atomic Fluorescence Fluorescence Spectrometry Spectrometry (CVAFS)(CVAFS)
Tekran 2537A FlowTekran 2537A Flow
Tekran 1130 & 1135 UnitsTekran 1130 & 1135 Units
Particulate Hg and Hg Speciation Particulate Hg and Hg Speciation ComponentsComponents
System Flow Diagram
Additional parameter Additional parameter monitoringmonitoring
Criteria air pollutants: NOx, SOx, Ozone, Criteria air pollutants: NOx, SOx, Ozone, COCO
Meteorological measurements: Meteorological measurements: temperature, wind speed and direction, temperature, wind speed and direction, relative humidity, rainfall, solar radiation, relative humidity, rainfall, solar radiation, barometric pressure, associated calculated barometric pressure, associated calculated valuesvalues
All instruments run continuously, logging All instruments run continuously, logging at five minute intervals – or time scale of at five minute intervals – or time scale of interest.interest.
Monitoring elemental Monitoring elemental mercury at a remediation mercury at a remediation sitesite
First use of instrumentation in the First use of instrumentation in the Bay AreaBay Area
Monitoring of elemental mercury Monitoring of elemental mercury adjacent to a remediation site in adjacent to a remediation site in Richmond, CARichmond, CA
USEPA Region 9 USEPA Region 9 LaboratoryLaboratory
EPA
Met Tower
August 26 – 30, 2003August 26 – 30, 2003
0
10
20
30
40
50
15:4
5
18:5
0
21:5
5
1:05
4:10
7:15
10:2
0
13:2
5
16:3
0
19:3
5
22:4
0
1:45
4:50
7:55
11:0
0
14:0
5
17:1
0
20:1
5
23:2
0
2:25
5:30
8:35
11:4
0
14:4
5
17:5
0
20:5
5
0:00
3:05
6:10
9:15
12:2
0
15:2
5
18:3
0
21:3
5
Time
Me
rcu
ry n
g/m
3
September 7 – 13, 2003September 7 – 13, 2003
0
100
200
300
400
500
600
700
800
900
1000
23:5
5
3:45
7:35
11:2
5
15:1
5
19:0
5
22:5
5
2:45
6:35
0:50
4:40
8:30
12:2
0
16:1
0
20:0
0
23:5
0
3:40
7:30
11:2
0
15:1
0
19:0
0
22:5
0
2:40
6:30
10:2
0
14:1
0
14:0
0
17:5
0
21:4
0
1:30
5:20
9:10
13:0
0
16:5
0
20:4
0
Time
Me
rcu
ry,
ng
/m3
Monitoring in support of Monitoring in support of the Guadalupe Watershed the Guadalupe Watershed TMDLTMDL
Plan was to deploy monitoring trailer Plan was to deploy monitoring trailer at four locations in the watershed – at at four locations in the watershed – at least twice, once in the fall and once least twice, once in the fall and once during the wet season.during the wet season.
Actually we collected data at two Actually we collected data at two locations during September.locations during September.
If there is still interest we will deploy If there is still interest we will deploy again in April at up to 4 locations.again in April at up to 4 locations.
NASA Ames
Calero Reservoir
NASA Ames, Sunnyvale, NASA Ames, Sunnyvale, CACA
0
1
2
3
4
5
8/30
/200
5
9/1/
2005
9/3/
2005
9/5/
2005
9/7/
2005
9/9/
2005
Ele
men
tal,
(ng
/m3)
0
10
20
30
40
50
Rea
ctiv
e, P
arti
cula
te (
pg
/m3)
Elemental
Particulate
Reactive
Calero Reservoir, CACalero Reservoir, CA
0
1
2
3
4
5
Ele
me
nta
l, (
ng
/m3
)
0
10
20
30
40
50
Re
ac
tiv
e, P
art
icu
late
(p
g/m
3)
Elemental Mercury
Particulate
Reactive
Summary of Mercury Summary of Mercury ConcentrationsConcentrations
Mercury Concentrations – September 2005
NASA Ames MDN
8/30 – 9/9/05
NASA Ames MDN
8/30 – 9/9/05
Calero Reservoir
9/9 – 27/05
Calero Reservoir
9/9 – 27/05
Mean Median Mean Median
Elemental Mercury (ng/m3)
1.909 1.736 1.940 1.780
Particulate Mercury (pg/m3)
2.732 1.803 3.665 2.811
Reactive Mercury (pg/m3)
1.528 0.837 4.528 1.448
n 74 74 140 140
Comparison to SFEI 2001 Comparison to SFEI 2001 datadata
SFEI study found Hg (0) ranged from SFEI study found Hg (0) ranged from 1.5 – 4.2 ng/m1.5 – 4.2 ng/m33
SFEI did not measure Hg (p) or RGM, SFEI did not measure Hg (p) or RGM, but used 95% Hg(0):3% but used 95% Hg(0):3% Hg(p):2%RGMHg(p):2%RGM
Our limited data show similar Hg(0) Our limited data show similar Hg(0) ranges, 1.2 – 3.9 ng/mranges, 1.2 – 3.9 ng/m33
The percent of Hg (p) and RGM were The percent of Hg (p) and RGM were consistently ~ 1 % of Hg(0).consistently ~ 1 % of Hg(0).
Next StepsNext Steps
Complete additional data analysisComplete additional data analysis Complete monitoring during other Complete monitoring during other
seasons (seasons (e.g.e.g. winter) winter) Identify quality control for Hg(p) Identify quality control for Hg(p)
and RGM and RGM Identify Additional ProjectsIdentify Additional Projects
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