Quality Assurance Handbook for Air Pollution Measurement Systems

Volume IV: Meteorological Measurements

Version 1.0 (Draft)

Revisions to the Met QA Handbook -- Volume IV Timeline: Comments on first draft due to Dennis Mikel, OAQPS, July 1 2007 http://www.epa.gov/ttn/amtic/met.html Second draft expected mid-September with 3-months of review. Finalized by end of January of 2008.

The Document: Lots of good information, potentially burdensome requirements. Core requirements are in several tables listing calibration and audit specs. Given constrained resources, what requirements are appropriate: ==> balance of cost and needed level of data quality

Volume 4 Revision No:1.0 Date: 10/2006 Page x of xi

Tables Number

Title

Section Page

0-1

PAMS Meteorological Measurement Quality Objectives

6/15

0-2

PAMS Calibration and Accuracy Criteria

7/15

0-3

NCore Meteorological Measurement Quality Objectives

8/15

0-4

NCore Calibration and Accuracy Criteria

9/15

0-5

PSD Measurement Quality Objectives

10/15

0-6

PSD Calibration and Accuracy Criteria

11/15

0-7

Modeling Application Measurement Quality Objectives

12/15

0-8

Modeling Application Calibration and Accuracy Criteria

13/15

0-9

National Weather Service Measurements Quality Objectives

14/15

0-10

Siting and Exposure for Meteorological Sensors

15/15

1-1

Description of Different Towers

1-2

Limits on Terrain and Obstacles Near Towers

15/17

2-1

Time Constant Effects

19/27

2-2

Proposed Audit Criteria for the Sonic Systems

23/27

8-1

Typical Specifications for Meteorological Remote Sensors

3/26

8-2

Characteristics of Radar Wind Profilers

8/26

8-3

Recommended Audit Criteria for Sodar, Radar Wind Profilers, and RASS

10-1

DAS Screening Techniques

1/17

23/26 6/13

x

Volume 4, Section 0 Revision No: 0 Date: 10/2006 Page 6 of 15

Table 0-1 PAMS Meteorological Measurement Quality Objectives Measurement Ambient Temperature Relative Humidity Barometric Pressure Wind Speed Wind Direction Solar Radiation UV Radiation Precipitation Upper-Air Meteorology Temp Relative Humidity Direction Wind speed

Method Thermistor Psychrometer/ Hygrometer Aneroid Barometer Cup, Blade or sonic anemometer Vane or sonic anemometer Pyranometer UV A and B Radiometer Tipping Bucket RWP, Sodar, RASS

Raw Data Collection Frequency 1 minute 1 minute

75% 75%

ºC %

-20 to 40 0–100

0.1 0.5% RH

Minimum Sample Frequency Hourly Hourly

hPa

800 – 1100

0.1

Hourly

1 minute

75%

m/s

0.5 – 50.0

0.1

Hourly

1 minute

75%

Degrees

0 – 360

1.0

Hourly

1 minute

75%

Watts/m2 Watts/m2

0 – 1200 0 – 12

1.0 0.01

Hourly Hourly

1 minute 1 minute

75% 75%

mm/hr

0 – 30

0.25

1 minute Per sounding

75% 75%

ºC % Degrees m/s

0 – 35 0 –100 0 – 360 0 – 45

0.2 5.0 10 0.5

Hourly 4 profiles per day

Reporting Units

Operating Range

Resolution

Completeness

Volume 4, Section 0 Revision No: 0 Date: 10/2006 Page 7 of 15

Table 0-2 PAMS Calibration and Accuracy Criteria Measurement Ambient Temperature

Relative Humidity Barometric Pressure Wind Speed Wind Direction Solar Radiation UV Radiation Precipitation Upper-Air Meteorology Temp Relative Humidity Direction Wind speed

Calibration Acceptance Type Criteria 3 pt. Water Bath with ±0.5 ºC NIST-traceable thermistor or thermometer NIST-traceable ±3% RH Psychrometer or standard solutions NIST-traceable ±1 hPa Aneroid Barometer NIST-traceable ±0.2 m/s + Synchronous Motor 5% Solar Noon, GPS or ±5 degrees Magnetic Compass NIST-traceable ±5% Pyranometer NIST-traceable ±5% Radiometer Separatory funnel and ±10% of graduated cylinder input volume Tethered or Balloon 0.2 ºC Sonde with NIST5% traceable Sensors 10 degrees 1 m/s

Frequency Semi-Annually

Semi-Annually Semi-Annually Semi-Annually Semi-Annually Semi-Annually Semi-Annually Semi-Annually Semi-Annually

Accuracy Acceptance Type Criteria ±0.5 ºC 3 pt. Water Bath With NIST-traceable thermistor or Thermometer NIST-traceable ±3% RH Psychrometer or standard solutions NIST-traceable Aneroid ±1 hPa Barometer NIST-traceable 0.2 m/s + Synchronous Motor 5% Solar Noon, GPS, or ±5 degrees Magnetic Compass NIST-traceable ±5% Pyranometer NIST-traceable ±5% Pyranometer Separatory funnel and ±10% of graduated cylinder input volume Tethered or Balloon 0.2 ºC Sonde with NIST5% traceable Sensors 10 degrees 1 m/s

Frequency Annually

Annually Annually Annually Annually Annually Annually Annually Annually

The Hammer? QAPP approval... ==>

SLT’s need to justify funding for data collection activities that don’t meet EPA QA guidance