CAMD PROGRAM UPDATE

NACAA/EPA Ambient Air Monitoring Steering CommitteeClean Air Markets Division, OAP

June 21-22 2007

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– Conversion may be delayed

200920092008200820072007

?

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

• 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

Anticipated award of contract is July 2007

Modifying the CASTNET Filterpack

Teflon Particulates

• SO42-

• NO3-

• NH4+

• Ca2+, Na+, Mg2+

• Cl-

Gaseous

• HNO3

• SO2

Nylon

Gaseous

• SO2

Whatman

Airflo

w

Filterpack Strengths: Long-term Consistent Record

p-SO42-

Total NO3- (p-NO3

- + HNO3)

Base Cations

Cost

Potential Improvements: Temporal Resolution (daily)

Add Ammonia (NH3)

p-NO3-/HNO3 Uncertain*

Ammonium (p-NH4+) Bias*

*chemistry on Teflon filter

Concurrently exploring a more traditional alternativeto online multi-pollutant analyzers

Met One Instruments SASS: Ambient Chemical Speciation Sampler

Canister

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.

Inlet

Denuder (1)

Denuder (2)

Modified SASS Canister

Filter (Particulate)

Acid Impregnated Filter

Denuder (1) analyzed for SO2 & HNO3

Denuder (2) analyzed for NH3

Nylon Filter analyzed for particulate: SO4

2-, NO3-, NH4

+, Cl-, K+, Na+, Mg2+, and Ca2+

Ammonium from the Nylon Filter

Rectifies p-NO3-/HNO3

Ammonia (NH3) = yes Removes Ammonium (p-NH4

+) bias24-hour samples

Rural CASTNET Ozone Monitoring

QA Requirement 40 CFR Part 58

EPA CASTNET

SLAMS OAQPS Recommendation

National Standard at EPA Regional Office vs In House Primary Standard 1/year

1/year 1/year Maintain current practice

In House Standard vs Traveling Field Standard 1/3-months

2/3-months 2/3-months Maintain current practice

Traveling Standard Calibrates Field Sampler’s zero air and O3 span gas source 1/3-months

1/6 months 1/3-months Convert to1/3-months schedule to

calibrate field sampler.

Precision & Level 1 Check 1/2-weeks

1/2-weeks Converting to

1/2-days Daily

1/2-weeks meets criteria; however more frequent checks encouraged.

Accuracy Check 1/year 1/2-year 1/year

Accuracy Check Convert to 1/year

Multipoint calibration 1/6-months 1/6-months 1/6-months Maintain current practice

Annual NPAP Audit 20 % of network per Year 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

40 CFR Part 58, Ozone Monitoring Requirements by O3 season 2008?

AIRNow and AQS by O3 season 2008?

Current models are no longer supported by the manufacturer

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

Denuder

Filter

Radiello

Ogawa

From Gay and Kenski

• Best accuracy compared to denuder measurements

• Best reproducibility

• Lowest detection limits

Radiello Measures, January 2, 2007

0.00

0.50

1.00

1.50

2.00

2.50

Bondville Athens Cincinnati Indianapolis Mayville

ppb A

mm

onia

R1

R2

R3

From Gay and Kenski

Radiellos had very promising results

Triplicate measurements

State Station Name NTNCASTNET Denuder Cont. Other

Exp. Conc. Sponsor

CO Fort Collins X Med NPS

IL Bondville X X X X Alpha Med LADCO/ISWS

IL Detroit Med LADCO/ISWS

IL Mayville ? X High LADCO/ISWS

KS AQS #20-1225-0006 X Med KDHE

NC Clinton Crops X XTEI 17C Alpha High NCSU/EPA/NCDENR

NC Jamesville XTEI 17C Alpha Med NCSU/EPA/NCDENR

NCLenoir Community College

TEI 17C Alpha Low NCSU/EPA/NCDENR

NY Connecticut Hill X X X Med Cornell/IES

ON Egbert ** X X X Alpha Med EC

SCCongaree NP, Cape Romain, or Longcreek X ? SCDHEC

OKStilwell (Cherokee Nation) X X X Med

Proposed passive ammonia sites