Update of new AERMOD Evaluation Databases

R. Chris OwenOAQPS/AQMG

6/6/2018

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Evaluation database development and analysis

• Stationary sources• Kuparuk, Alaska Drill Rig• Denver-Julesburg Basin, Colorado Drill Rig• Oklahoma Compressor Station

• Near-road • Las Vegas, Nevada• Detroit, Michigan

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Drill Rig 1-hour NO2 Monitoring Studies

North Slope, AlaskaDS2N Well Pad

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Denver-Julesburg Basin, COPad 1, Pad 2

Barrow

Collaborative Effort

• American Petroleum Institute (API)*

• Bureau of Land Management (BLM)*

• Conoco-Phillips Alaska*

• Anadarko (Colorado)*

• US EPA

• ERM

• AECOM

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North Slope, AlaskaBarrow

Current Alaska Workgroup Members

• AECOM - Christopher Warren, Bob Paine• BLM - Tom Coulter• US EPA OAQPS - Chris Owen, Clint Tillerson• US EPA Region 1 - Leiran Biton• US EPA Region 5 - Gilberto Alvarez, Jennifer Liljegren• US EPA Region 8 - Rebecca Matichuk• US EPA Region 10 – Jay McAlpine

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Denver-Julesburg Basin, Colorado

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Monitoring Period

• October 10 – November 16, 2014 • Adjacent Well Pads (Pad 1, Pad 2)• 12 Ambient AQ Monitors • 3 Discrete Monitoring Configurations for Evaluation

• Pad 1:October 10, 2014 - October 26, 2014• Pad 2a:November 3, 2014 - November 8, 2014• Pad 2b:November 10, 2014 - November 16, 2014

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12

A

B

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Current Colorado Workgroup Members

• AECOM - Bob Paine, Christopher Warren • ERM - Mark Garrison • US EPA OAQPS - Chris Owen, Clint Tillerson• US EPA Region 1 - Leiran Biton• US EPA Region 5 - Gilberto Alvarez, Jennifer Liljegren • US EPA Region 7 - Lance Avey, Andy Hawkins• US EPA Region 8 - Rebecca Matichuk• City of Denver - Mohamed Eltarkawe, Michael Ogletree, Gregg Thomas

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Compressor Station Field Study

• PRCI CPS-11-5: Ambient NO2 Modeling for 1 Hour Standard

• Four monitor locations• 3 “impact” and 1 “background”

• Meteorology – 2, 10, and 30 meter• Emissions data from engines using PEMS• Monitoring commenced Dec 1, 2015

• Completed Dec, 2016• Contact Gary Choquette

at gchoquette@prci.org

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Engine Exhaust Stacks

Unit 10

Cooper W330

Unit 9

Clark TCV-12

Unit 8

Clark TCV-10 (down)

Station 102 Utilization & Impact Hours

• September data highlights double-count of impact from 2 north monitors

• Significant additional run time (and favorable winds resulting in measured impacts) in last 4 months and in 13th

month

Las Vegas field study

• Field measurements conducted from Dec 2008 –Jan 2010

• Continuous measurements of CO, NOx, BC, PM10, PM2.5, winds, RH

• Monitoring 100 m west of the roadway and at 20, 100, and 300 m east of the roadway.

• On-site traffic monitoring, vehicle counts in each lane

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Detroit field study• Field measurements conducted from Sept. 2010 – June 2011

• Continuous measurements of CO, NOx, BC, PM10, PM2.5, winds, RH

• Monitoring 100 m west of the roadway and at 20, 100, and 300 m east of the roadway.

• On-site traffic monitoring, vehicle counts in each lane

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Las Vegas and Detroit study considerations

• Emissions based on vehicle counts and MOVES emissions modeling• i.e., greater uncertainty in emissions than studies based on tracer data or on CEMS

data

• For NO2 evaluations, no on-site ozone monitoring• Up-wind/down-wind configuration allows for clear delineation of

background

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What other data sets are available?

• Several suggestions that the SO2 process should lead to at least a few reasonable databases

• Key components:• Actual emissions• Nearby met• Monitoring data

• Facilities that have sought alternative model approval• Historical data sets• Which pollutants?

• Measurements with 1-hour resolution• “Inert” or primary pollutants (NOx rather than NO2)