Evaluation of Simultaneous PM10, PM2. 5, and PM10-2

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Presentation transcript:

Evaluation of Simultaneous PM10, PM2. 5, and PM10-2 Evaluation of Simultaneous PM10, PM2.5, and PM10-2.5 Measurements Conducted in Bakersfield, CA with the Teledyne-API Model 602 BetaPLUS Particle Measurement System Stephen Toner, Ph.D. Senior Chemist & Development Engineer at Teledyne - API March 10, 2011 2011 EPA National Air Quality Conference San Diego, CA

Outline The Teledyne-API Model 602 BetaPLUS Overview Features EPA FEM Candidate Trials Designations & Site Selection Summer 2010 in Bakersfield, CA Winter 2010/2011 in Bakersfield, CA Conclusions & Future Directions Learn more at booth #29 © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

Teledyne-API Model 602 BetaPLUS Instrument Overview Two independent sampling channels Sequential sampling onto 47mm diameter filter discs A single beta attenuation mass measurement sensor Sampling and analysis occur independently Long sampling times – 59 min / hour Long analysis times – high precision Complete remote communications / instrument control & internal DAS US EPA FEM Candidate for PM10, PM2.5, and PM10-2.5 16.7 lpm flow rate – different inlet configs © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

Teledyne-API Model 602 BetaPLUS Mass Measurement System Rotating plate filter holder design (3 processes) Step 1: Filter Loading / Unloading Step 2: Filter Sampling Step 3: Filter Analysis Additional reference filter positions Mass calibration reference standards (R1, R2) “Spy filters” for repeated blank reference Multiple step analysis process Air Counts Dark Counts Blank Counts Natural Counts Collect Counts © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

Teledyne-API Model 602 BetaPLUS Key Features Two Independent Sampling Lines Combined with Internal Automated Mass Measurement US EPA Candidate FEM for PM10, PM2.5, PMC all in one instrument 2. Multi-step Mass Analysis Process incorporate “Spy filters” resulting in High Performance beta method Independently measures beta attenuation due to fluctuations in: Air Density Humidity Filter Blank Naturally occurring radioactivity (Radon daughters) Radioactive source Detector power supply 3. Preserved 47mm Filter Samples for Subsequent Analysis Off –line analysis of sample filters: Metals, OC/EC, Black Carbon, Sulfates, etc. © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

Europe: MCerts, TÜV United States EPA Teledyne-API Model 602 BetaPLUS Regulatory Certifications Europe: MCerts, TÜV EN12341-1999 (PM10) EN14907-2005 (PM2.5) Completed in 2009 United States EPA US EPA Candidate FEM (PM10, PM2.5, PMC) Underway, two tests complete Scheduled completion in 2011 © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials 40 CFR Part 53 PM2.5 Class III FEM PM10-2.5 Class III FEM PM10 FEM Five Tests Four locations © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials 40 CFR Part 53 PM2.5 Class III FEM PM10-2.5 Class III FEM PM10 FEM Five Tests Four locations © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA The Challenges of Bakersfield Summer Hot, dusty, and can have several days of low PM2.5 concentrations Semivolatiles condense onto particles at night if temperatures are cool enough Winter Cool days and cold nights with high humidity Dense fog events are very common and can last several days can be problematic with filter media High levels of semivolatile organic species as well as ammonium nitrate Need to be careful with indoor shelter temperature and line insulation Bakersfield, CA is the ideal test site for Column A in the previous table © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA (3) Three Model 602 Instrument Inlets (3) BGI PQ200 Model PM10 FRM Samplers (3) BGI PQ200 Model PM2.5 FRM Samplers Two Seasons Summer (23 days) Winter (23 days) © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA Summer © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA Winter © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA Summer © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA Winter © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA Summer © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA Winter © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA Summer © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA Winter © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA PM2.5 Results © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA PMC Results © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

EPA FEM Candidacy Trials – Bakersfield, CA PM10 Results © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

Conclusions Teledyne API Model 602 BetaPLUS Particle Measurement System Summer and Winter Data in Bakersfield, CA meets the EPA FEM precision & accuracy criteria Provides hourly measurements of PM10, PM2.5, and PM10-2.5 Very little downtime Samples 59 minutes of each hour High precision PM10, PM2.5, and PM10-2.5 1-hr data Good accuracy & precision when comparing to FRM data Optimal performance in high humidity & rainy weather conditions © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

Future Directions Complete EPA FEM Candidacy Trials One more Summer location Two more Winter locations Will finalize testing in 2011 Run side-by-side comparisons with other EPA designated FEM’s for PM10 & PM2.5 Will also have FRM data for comparison Run comparisons in varying weather conditions & chemical compositions High temp / low temp High RH / Low RH © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

Acknowledgements Teledyne – API - Eric Holden - Robin Becker Tim Morphy - Jeff Franks California Air Resources Board (CARB) Debbie Henson - Ken Stroud Phil Powers Inter-Mountain Labs (IML) Mary Hininger - Kevin Chartier FAI Instruments Roberto Ferrera - Antonio Febo Enrico Bompadre - Antonio Imperatore Frank McElroy Tom Merrifield © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

Please visit Booth #29 to learn more Thank You Please visit Booth #29 to learn more © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.

Teledyne-API Model 602 BetaPLUS Specifications Item Hourly Mode Multi-Mode Sampling Period 1 Hour 8-12-24-48-72 Hours Filter Cartridges 47 mm dia. 47 mm dia. Spot Size 0.95 cm² 2.54, 5.2, 7.07, 11.95 cm² Filter Media Quartz, Glass Quartz, Glass, PTFE Filter Capacity 96 Cartridges Range Up to 10 mg/m3 Detection Limit < 4 µg/m3 (1hr), 0.3 µg/m3 (24 hr) Flow Rate 16.7 LPM, adjustable 14 to 41 LPM Flow Accuracy + 1% Flow Stability + 0.5% (Typical) Flow Control Servo-Controlled Valve Mass Measurement Beta Attenuation using 14C (less than 100µCi) with Geiger Muller detector Weight 64 kg. (141 lbs.) Power Consumption 1200 W © 2011 Teledyne - Advanced Pollution Instrumentation, Inc.