Chuck Sarnoski Delaware DNREC / DAQ

Transcription

1 Chuck Sarnoski Delaware DNREC / DAQ

2 TSI Model 331 The UFP Monitor measures size classified number concentration of ambient particles Designed for long-term, unattended monitoring of ultrafine particle concentration and size distribution in urban air and remote locations Size range - 2 to 1 nm Six channels of size resolution 2-3 nm, 3-5 nm, 5-7 nm, 7-1 nm, 1-2 nm and > 2 nm Continuous monitoring with reporting every 15 min Limit - 5 to 16 particles/cm3 at 2 nm; 5 to 16 particles/cm3 at 2 nm Delaware Division of Air Quality 2

3 TSI Model 331 Design Features Long-term, unattended operation Low start-up and operating costs No working fluids, no radioactive source Continuous monitoring with output every 15 min Convenient data management with remote access via the Internet Comprehensive environmental sampling system Delaware Division of Air Quality 3

4 TSI Model 331 with Environmental Sampling System Delaware Division of Air Quality 4

5 Environmental Sampling System Delaware Division of Air Quality 5

6 TSI Model 331 Sampling System Standard PM1 inlet Standardized size-selective sampling of outdoor aerosol Sharp cut PM1 cyclone Removes large particles to avoid contamination of UFP Monitor Flow splitter Splits inlet sample flow to enable sub-sampling portion of flow into particle measurement system Nafion dryer Conditions sample to remove effects of rh on aerosol Delaware Division of Air Quality 6

7 TSI Model 331 Sampling System Delaware Division of Air Quality 7

8 TSI Model 331 Sampling System The Model 331 allows user selectable sampling system configuration. Delaware Division of Air Quality 8

9 TSI 331 Flow Schematic Delaware Division of Air Quality 9

10 Differential Mobility Analyzer Delaware Division of Air Quality 1

11 TSI 331 Installation Delaware Division of Air Quality 11

12 TSI 331 Roof Inlet Delaware Division of Air Quality 12

13 TSI 331 Sampling System Delaware Division of Air Quality 13

14 TSI 331 Delaware Division of Air Quality 14

15 Estimated Instrument Cost Model ,5. Sampling System 6,35. Vacuum Pump 85. Consumables (1 year) 1,375. Service Contract (1 Year) 4,5. Total 65,125. BandAids, Asprin, Psychotherapy Priceless Delaware Division of Air Quality 15

16 Installation & Operation Concerns No guidance on sampling methodology Technology experts located in Germany Instrument QA Confidence of reported data Maintenance & Service Delaware Division of Air Quality 16

17 OK, you re collecting data now what?

18 How do we get the data? Not currently part of the digital data acquisition system so must be manually collected Data downloaded as ASCII file (direct to local PC or memory stick, or via internet), then imported into Excel spreadsheet and stored on local server New version of DAS should be able to query monitor directly Delaware Division of Air Quality 18

19 What does the data look like? Raw data are 15-minute intervals Includes multiple monitor fields, particle count channels, status codes id startscan endscan comment x5a x5b siglna siglnb ca_cb cges ch1 ch2 ch3 ch4 ch5 ch6 bs fs status :: :14: :15: :29: :3: :44: :45: :59: :: :14: :15: :29: :3: :44: :45: :59: :: :14: :15: :29: :3: :44: :45: :59: :: :14: Delaware Division of Air Quality 19

20 Data Review Start with basic QC information and records: Maintenance schedule - follow recommendations according to operation manual Field checks - based on operation manual Monitor field records includes flow and operational parameter checks Delaware Division of Air Quality 2

21 Monthly Field Check Forms Date Flow Std. Type Flow Checks and Adjustments Ultrafine Particle Monitor Site Flow Std. S/N Instrument Checks Ultrafine Particle Monitor PARAMETER READING NORMAL RANGE Flow Check and Adjusted Flows Date/Time ± 1 Minute Sample Flow (L/Min) Adj Sample Flow (L/Min) Purge Flow (L/Min) Adj Purge Flow (L/Min) Sheathflow Actual Value Temperature Pressure 19 to 2 l/min 15 to 3 C 76. to kpa Aerosol/Electrometer Avg Sample Flow (L/Min) Avg Adj Sample Flow (L/Min) Avg Purge Flow (L/Min) Avg Adj Purge Flow (L/Min) Charger Voltage 22 to 24 V Charger Current 99 to 12 µa Adjust sample flow to within ±.5 L/Min of 5. L/Min. Adjust purge flow so that purge flow plus sample flow adds up to 16.7 L/Min. Comments: 3312 Environmental Sampling System Pressure Gauge -11 to -1 PSI Inst. Op. Date Delaware Division of Air Quality 21

22 Monthly Data Validation Record For validation, if operational parameters are OK, then look at status code column. UFP Data Validation Month and Year: Questionable data: Date Submitted to QAC: Date Reviewed by QAC: Date Time Description Delete? Reason/Comment Raw data spreadsheet: ch1 ch2 ch3 ch4 ch5 ch6 bs fs status Status Codes : Scan not finished. 1: Scan finished, but results not calculated. 2: Result calculated, no particle loss correction. 3: Result calculated, cyclone particle loss correction. 4: Result calculated, sampling system correction. Delaware Division of Air Quality 22

23 PN #/cm3 After validation data analysis June 1-7, 211: 15-Minute Averages /1/211 6/2/211 6/3/211 6/4/211 6/5/211 6/6/211 6/7/211 Delaware Division of Air Quality 23

24 UFP PN #/cm3 Sharp PM2.5 ug/m3 Total all six channels and compare to continuous PM2.5 June 1 7, 211: 15-Minute Averages UFP total Sharp PM /1/211 6/2/211 6/3/211 6/4/211 6/5/211 6/6/211 6/7/211 Delaware Division of Air Quality 24

25 UFP PN (#/cm3) Sharp PM2.5 ug/m3 Compile 1-hour averages and compare to PM2.5 June 1 7, 211: Hourly Averages Total UFP PM2.5 Sharp /1/211 6/2/211 6/3/211 6/4/211 6/5/211 6/6/211 6/7/211 Delaware Division of Air Quality 25

26 June 211 data distribution June 211 Distribution 15-minute Averages at MLK 1 Particle Counts (num/cm3) Size (nm) Delaware Division of Air Quality 26

27 Compare MLK and Lewes Lewes June 212 MLK June PN (# cm3) 6 4 PN (# cm3) Size (nm) Size (nm) Delaware Division of Air Quality 27

28 From: Carly Phelps, MS Urban and Rural Ultrafine Particle (UFP) Data Analysis for Data Collected at MLK (Wilmington) and Lewes, August 212 Delaware Division of Air Quality 28

29 Summary Ease of operation does not equal ease of interpretation. When problems arise, they seem to be obvious and easy to detect in the data. Not a lot of experience at other states/agencies yet; limited number of contacts in US. Just beginning to explore dataset, early evaluations indicate lots of potential. Delaware Division of Air Quality 29

30 Compare UFP data January 212 and 213 Lewes January 212 Lewes January th perc min median max 75th perc 25th perc min median max 75th perc ch1 ch2 ch3 ch4 ch5 ch6 ch1 ch2 ch3 ch4 ch5 ch6

31 Compare UFP data June 212 and 213 June 212 Lewes Lewes June th perc min median max 75th perc 25th perc min median max 75th perc ch1 ch2 ch3 ch4 ch5 ch6 ch1 ch2 ch3 ch4 ch5 ch6

32 Count Nox ppb Diurnal patterns UFP and NOx winter (J-F-M) and summer (J-J-A) Lewes 213 Diurnal Averages all channels Lewes 213 NOx Diurnal Averages J-F-M J-J-A J-F-M J-J-A Hour Hour

33 Compare 212 to 213 Lower particle numbers for all channels in 213 both summer and winter Summer and winter diurnal patterns are different in 213 compared to 212 What changed monitor returned to manufacturer for annual calibration in fall 212

34 UFP Total all channels Nox ppb UFP Total all channels Nox ppb Lewes 213 UFP data January and June compared to NOx Lewes Jan. 213 Hourly Total UFP and NOx Lewes June 213 Hourly Total UFP and NOx UFP all channels NOx UFP all channels NOx

35 Nox ppb Nox ppb 35 Correlations 213 UFP and NOx Lewes Jan. 213 NOx vs Total UFP Hourly Avgs January and June 35 Lewes June 213 NOx vs Total UFP Hourly Avgs UFP Total all channels UFP Total all channels

36 Current Status 213 data some correlation between UFP total counts with NOx concentrations More work needed to establish correlations, diurnal/seasonal patterns, meteorological analyses UFP monitor will be relocated to urban mobile source impacted MLK site, start data collection by January 214