Met One Instruments BAM-1020 PM 2.5 FEM

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1 Met One Instruments BAM-1020 PM 2.5 FEM David Gobeli, Ph.D. Met One Instruments 10/21/2007 1

2 Agenda Background Test Protocol Test Results 10/21/2007 2

3 Background US Regulations (40CFR 53) revised in October, 2006 No Coarse (PM ) Standard Very unexpected change of course US network will be minimal (~75 sites total, probably far fewer with automatic monitors) At least 5 years before issue is revisited PM 10 regulations reaffirmed Detailed designation procedures developed for automatic (Class III) PM 2.5 monitors 10/21/2007 3

4 New US Regulations 40 CFR 53 Expect PM monitoring sites currently using Federal Reference Method (FRM) samplers to be replaced with continuous monitors after PM 2.5 FEM monitors become available. US-EPA is encouraging development of particulate speciation samplers for PM fraction 10/21/2007 4

5 PM 2.5 Comparability Test 5 Test Campaigns 3 Winter 2 Summer Protocol Triplicate BAM-1020 and Triplicate FRM Minimum 23 Valid Days of Data 46 Valid Days for Winter/Summer Site Strict criteria for multiplicative (slope), additive (intercept) bias and precision 10/21/2007 5

6 Logan UT Allen Park MI New Haven CT Bakersfield CA 10/21/2007 6

7 10/21/2007 7

8 10/21/2007 8

9 Allen Park, MI 10/21/2007 9

10 Logan, UT 10/21/

11 Bakersfield, CA 10/21/

12 New Haven, CT 10/21/

13 BAM-1020 PM 2.5 FEM Status BAM-1020 successfully completed US-EPA PM 2.5 FEM field campaigns at all sites Logan UT (winter) Bakersfield CA (winter and summer) Allen Park, MI (winter) New Haven, CT (summer) Designation application completed and submitted. 10/21/

14 Logan, UT Winter Candidate method concentration, µg/m 3 Comparability of Candidate and FRM Methods* y = 0.973x FRM concentration, µg/m 3 10/21/

15 Logan, UT Winter Regression statistics Slope 1 Intercept 2 Correlation (r) Statistics for this test site: Limits for Upper: PM2.5 Class III Lower: Test Results (Pass/Fail): PASS PASS PASS Data Set Slope and Intercept, and Limits Intercept, ug/m Slope 10/21/

16 Allen Park, MI Winter Candidate method concentration, µg/m 3 Comparability of Candidate and FRM Methods* y = x FRM concentration, µg/m 3 10/21/

17 Allen Park, MI Winter Regression statistics Slope 1 Intercept 2 Correlation (r) Statistics for this test site: Limits for Upper: PM2.5 Class III Lower: Test Results (Pass/Fail): PASS PASS PASS Data Set Slope and Intercept, and Limits Intercept, ug/m Slope 10/21/

18 Bakersfield, CA Winter and Summer Candidate method concentration, µg/m 3 Comparability of Candidate and FRM Methods* y = x FRM concentration, µg/m 3 10/21/

19 Bakersfield CA Winter and Summer Regression statistics Slope 1 Intercept 2 Correlation (r) Statistics for this test site: Limits for Upper: PM2.5 Class III Lower: Test Results (Pass/Fail): PASS PASS PASS Data Set Slope and Intercept, and Limits Intercept, ug/m Slope 10/21/

20 New Haven, CT - Summer Candidate method concentration, µg/m 3 Comparability of Candidate and FRM Methods* y = 1.02x FRM concentration, µg/m 3 10/21/

21 New Haven, CT Summer Regression statistics Slope 1 Intercept 2 Correlation (r) Statistics for this test site: Limits for Upper: PM2.5 Class III Lower: Test Results (Pass/Fail): PASS PASS PASS Data Set Slope and Intercept, and Limits Intercept, ug/m Slope 10/21/

22 Conclusions Slope/Intercept almost identical at each test site No geographical influence No seasonal influence Changes to BAM-1020 required to meet new designation rules are relatively modest No increased complexity No site specific calibration factors 10/21/

23 Conclusions (continued) BAM-1020 will likely be the first PM 2.5 monitor to receive US-EPA designation as Class III FEM. 10/21/

24 BAM-1020 FEM Specifications Parameter Performance Specification Measurement Ranges Measurement Cycle Sampling period per measurement cycle Counting period per measurement cycle Lower Limit of Detection (2σ) 1 hour Lower Limit of Detection (2σ) 24-hours Root mean square (RMS) error (1-hour) Root mean square (RMS) error (24-hours) 0-1,000 µg/m 3 standard 1 hour standard, others available minutes user selectable depending on counting period per cycle 4, 6 or 8 minutes < 3.0 µg/m 3 < 0.6 µg/m 3 < 1.5 µg/m 3 < 0.3 µg/m 3 Source Composition and 14 C < 100 µci 10/21/2007 Activity 24

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