CAMD PROGRAM UPDATE
June 21-22 2007
NACAA/EPA Ambient Air Monitoring Steering Committee
Clean Air Markets Division, OAP
Topic Summary
• CASTNET Network Status
• Multi-pollutant Contract
• Modified denuder and filter
pack
• Ozone monitoring upgrade
• NADP passive ammonia
monitoring
• Mercury monitoring
Network Site Status
CASTNET budget in the near future
•
•
•
•
•
•
25% Reduction in FY08 EPA
CASTNET budget
Translates to 8-10 sites shutting
down
Continuing reduction at NPS
–
Anticipate shutting down 8
sites over 5 years
Impact on Funding to NADP
–
Reduce Site Audit Program
–
Eliminate support for 10 sites
For 2008, 86 → ~69 sites
–
45 EPA sites
–
24 NPS sites
Facing 280K per yr Ozone QA cost
–
2007
?
Conversion may be delayed
2008
2009
Multi-Pollutant Instrument Contract
•
Initiated a performance-based instrument procurement contract for 3.4 Million to
identify a high resolution, multi-pollutant instrument to replace current CASTNET
technology
•
Contractor must meet specific performance goals specified in the contract
•
-
RFP issued – March 8th
-
Proposals due – April 20th
-
Technical Evaluation Panel (TEP) – convened and currently writing
the report
-
Award Date – July 1st (up to two contractors)
Contract Breakdown (July 2007- July 2012):
-
Initial Demonstration Period (30 days)
-
Development Period (12 months)
-
Final Demonstration Period (30 days)
-
Option to Purchase, Deploy and Operate Additional Instruments (remaining
2 years)
Contract Breakdown
Anticipated award of contract is July 2007
•
Base Period (2 months)
– 2 instruments delivered within 90 days of award
– 30 day demonstration period
– Must meet 75% of contract performance goals
•
Option Period I (12 months)
– 12 month development period
• Continued evaluation of progress toward contract
performance goals
•
Option Period II (2 months)
– 30 day demonstration period
• Administered by a third-party (i.e., ETV Program)
• Must meet all of the contract performance goals
•
Option Period III-IV (Remaining 2 Option years 2009-12)
– Exercise option to procure and deploy additional instruments
– Exercise option to operate instruments
Modifying the CASTNET Filterpack
Concurrently exploring a more traditional alternative
to online multi-pollutant analyzers
Whatman
Filterpack Strengths:
Gaseous
 Long-term Consistent Record
• SO2
 p-SO42Nylon
Gaseous
 Total NO3- (p-NO3- + HNO3)
• HNO3
Airflow
 Base Cations
• SO2
Teflon
 Cost
Particulates
• SO42-
Potential Improvements:
• NO3• NH4+
•
Ca2+,
• Cl-
Na+,
 Temporal Resolution (daily)
Mg2+
 Add Ammonia (NH3)
 p-NO3-/HNO3 Uncertain*
 Ammonium (p-NH4+) Bias*
*chemistry
on Teflon filter
Met One Instruments SASS:
Ambient Chemical Speciation Sampler
Currently the predominant sampler in the Speciated Trends Network (STN)
The STN samplers collect 24-hour every 3rd day.
The SASS can be easily modified to collect
sequential daily samples. The sampling
method can also be modified to incorporate
desired improvements.
Canister
Modified SASS Canister
Ammonium from the Nylon Filter
Acid Impregnated Filter
Nylon Filter analyzed for
particulate: SO42-, NO3-, NH4+, Cl-,
K+, Na+, Mg2+, and Ca2+
Filter (Particulate)
Denuder (2) analyzed for NH3
Denuder (2)
Denuder (1) analyzed for SO2 &
HNO3
Denuder (1)
Rectifies p-NO3-/HNO3
Ammonia (NH3) = yes
Removes Ammonium (p-NH4+) bias
24-hour samples
Inlet
Rural CASTNET Ozone Monitoring
QA Requirement
40 CFR Part 58
National Standard at EPA
Regional Office vs In
House Primary Standard
1/year
In House Standard vs
Traveling Field Standard
1/3-months
Traveling Standard
Calibrates Field Sampler’s
zero air and O3 span gas
source
1/3-months
Precision & Level 1 Check
1/2-weeks
Accuracy Check
1/year
Multipoint calibration
1/6-months
Annual NPAP Audit
20 % of network per Year
EPA
CASTNET
SLAMS
OAQPS Recommendation
1/year
1/year
Maintain current practice
2/3-months
2/3-months
Maintain current practice
1/6 months
1/3-months
Convert to1/3-months schedule to
calibrate field sampler.
1/2-weeks
Converting to
1/2-days
Daily
1/2-weeks meets criteria; however more
frequent checks encouraged.
1/2-year
1/year
Accuracy Check
Convert to 1/year
1/6-months
1/6-months
Maintain current practice
Not Performed
20% of network per
Year
Join NPAP
Ozone Monitoring Upgrades
57 EPA CASTNET Ozone Analyzers
•
37 units need replacement
•
15 units on order
Current models are no longer
supported by the manufacturer
40 CFR Part 58, Ozone Monitoring Requirements
by O3 season 2008?
AIRNow and AQS
by O3 season 2008?
Ozone Monitor Upgrades
Proposed NADP Passive Ammonia Network
•
Purpose: To determine actual costs of
network, sampling variability and other
considerations
•
Bi-Weekly measurements
•
Core network of 10 EPA-sponsored sites
– Triplicate Radiello devices + field blank
– Collocated with denuder or continuous
ammonia monitoring
– Ongoing evaluation of data will be used to
determine if frequency of field blanks and
replicates may be reduced
– $7700 per site
•
QAPP & SOPs to be prepared
•
Total program cost $225K over two years
•
Additional sites may be added at $5k/site
Radiellos had very promising results
12.00
Triplicate
measurements
10.00
ppb Ammonia
• Best accuracy
compared to
denuder
measurements
• Best reproducibility
• Lowest detection
limits
Passive Results, Measures
8.00
Den
Denuder
6.00
Nitro
4.00
W
Filter
2.00
R
Radiello
O
Ogawa
0.00
8/11
8/31
Radiello Measures, January 2, 2007
9/20
10/10
Date
ppb Ammonia
2.50
2.00
R1
1.50
R2
1.00
R3
0.50
0.00
Bondville
Athens
Cincinnati
Indianapolis
Mayville
From Gay and Kenski
10/30
11/19
12/9
From Gay and Kenski
Proposed passive ammonia sites
State
Station Name
NTN
CAST
NET
Denuder
Cont.
CO
Fort Collins
IL
Bondville
IL
Detroit
IL
Mayville
KS
AQS #20-1225-0006
X
Clinton Crops
X
TEI
17C
X
NC
Other
X
X
X
?
X
NC
Jamesville
NC
Lenoir Community
College
NY
Connecticut Hill
X
X
ON
Egbert
**
X
NPS
Med
LADCO/ISWS
Med
LADCO/ISWS
High
LADCO/ISWS
Med
KDHE
Alpha
High
NCSU/EPA/NCDENR
TEI
17C
Alpha
Med
NCSU/EPA/NCDENR
TEI
17C
Alpha
Low
NCSU/EPA/NCDENR
Med
Cornell/IES
Med
EC
?
SCDHEC
X
SC
Congaree NP, Cape
Romain, or Longcreek
OK
Stilwell (Cherokee
Nation)
X
X
X
Alpha
X
X
X
Sponsor
Med
X
X
Exp.
Conc.
X
Alpha
Med