Development of Optical Remote Sensing Protocol for the Measurement of Nonpoint Emission Sources Patrick D. Sullivan Air Force Research Laboratory Ram Hashmonay.

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Presentation transcript:

Development of Optical Remote Sensing Protocol for the Measurement of Nonpoint Emission Sources Patrick D. Sullivan Air Force Research Laboratory Ram Hashmonay Arcadis G&M Patrick D. Sullivan Air Force Research Laboratory Ram Hashmonay Arcadis G&M

2 Need Statement No recognized method exists for making direct nonpoint source measurements. An accurate and cost-effective method is needed to quantify area emission sources.

3 Project Sponsor E nvironmental S ecurity T echnology C ertification P rogram

4 Path Integrated Concentration

5 Spectroscopic Methods: –Open Path Fourier Transform Infra Red (OP-FTIR) –Differential Optical Absorption Spectroscopy (DOAS) Advantages:Disadvantages: Multiple compounds simultaneouslyInterference Potential Particulate Matter Relatively slow OP Instrument Summary Laser Based Techniques: –Tunable Diode Laser Absorption Spectroscopy (TDLAS) –Differential Absorption Lidar (DIAL) Advantages:Disadvantages: FastTypically single compound Interference free Expensive Long range

6 Current Methods for Area Measurements SUMA Canisters

7 Intersecting Geometry The Conventional CT Approach courtesy of Drescher et al. (1996) Retro Mirror uni-static

8 New Method Summary Beam Configuration: OP-FTIR (or other OP method) multiple beams to determine vertical and horizontal gradients Optimization algorithms to directly reconstruct the mass equivalent plume downwind from the source No need for tracer release or inverse dispersion modeling approach for plume characterization Plane-integrated concentration x wind speed = emission flux

9 Example: Oxford NC Test

10 Radial Scanning

11 Reconstructed Plumes Actual release rate = 1.7 g/s Calculated flux = 1.2 g/s Measured    – 50.7 degrees (Pasquill-Gifford Stability A - unstable) Height [meters] Oxford NC Test Results

12 Reconstructed Plumes Actual release rate = 1.7 g/s Calculated flux = 1.5 g/s Measured    – 12.7 degrees (Pasquill-Gifford Stability C-D - neutral) Oxford NC Test Results

13 Radial Scanning

14 Radial Scanning for Hot Spots

15 Cost Comparison Estimate

16 Key Performers John Bosch Reg Advisor EPA-OAQPS Thomas Logan Tech Advisor EPA-OAQPS Robin Segall QA, Reg Lead EPA-OAQPS Various Technicians Arcadis Ram Hashmonay Tech Lead Arcadis Bruce Harris Tech Advisor EPA-APPCD Various Site Coordinators Army, Navy, AF Pat Sullivan PI AFRL/MLQF

17 Controlled Validation Design Soaker hose in ‘H’ pattern to simulate area source Point release to simulate a “hot spot” Ethylene (area), N 2 O test gas (point) Plane-integrated OP-FTIR downwind Radial scanning OP-FTIR over the source Met station and optical anemometer for wind Self-calibrated Gilson Tapered-tube flowmeter Weigh the gas cylinder before and after a 1-hour run to confirm the flowmeter

18 Controlled Validation Design

19 Demonstration Actual area sources at DoD installations will be measured and protocols refined Examples: WWTP, Landfills, Flightline Operations Methodology and actual costs to be documented

20 Technology Transfer Published EPA Method Optimization algorithms will be licensed to equipment manufacturers Optimization algorithms will be licensed to A&E firms providing base support services

21 Summary New OP multiple beam method can provide accurate quantification of area sources, with lower cost and complexity than conventional methods. This project will validate/demonstrate this method. This demonstration is strongly supported by the EPA. The project objective is to publish a standard protocol for measuring nonpoint sources. The OP multiple-beam method can become a powerful tool for DoD and industrial facility managers to solve P2 and compliance problems.