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/R Incorporated Providing Environmental Technical Support Since 1989

501 Eastowne Drive, Suite 250  Chapel Hill, North Carolina 27514

Telephone: (919)484-0222  Fax: (919) 484-0122

MEMORANDUM

Date: May 28, 2010

Subject: Summary of the March 23, 2010 Meeting Between the EPA and API 

Representatives Regarding Available Air Emissions Data Sources and 

Estimation Methodologies for the Oil and Gas Industry 

From: Robert Vogt, EC/R Incorporated

To: Bruce Moore, EPA/OAQPS/SPPD/CCG

I. PURPOSE

The purpose of this memorandum is to summarize the March 23, 2010 meeting between 

the Environmental Protection Agency (EPA) and industry representatives from the American 

Petroleum Institute (API). The purpose of the meeting was to gather information about available 

emissions data and calculation methods in the Oil and Gas Industry. 

II. DATE

The meeting took place on March 23, 2010 from 9:00 a.m. to 11:30 a.m. at the United 

States Environmental Protection Agency in Research Triangle Park, North Carolina. 

III. ATTENDEES

A sign in sheet with a list of attendees was collected and is included as Attachment 1. The 

following individuals were present at the meeting:

API

Matt Todd, Regulatory Analyst

BP

Jeffrey A. Adams, Manager, Regulatory Affairs

ExxonMobil

Tom Monahan, Senior Regulatory Specialist

U.S. Environmental Protection Agency (EPA/OAQPS)

Alex MacPherson, Health and Environmental Impacts Division, Air Benefit and Cost Group
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/R Incorporated Providing Environmental Technical Support Since 1989

501 Eastowne Drive, Suite 250  Chapel Hill, North Carolina 27514

Telephone: (919)484-0222  Fax: (919) 484-0122

Bruce Moore, Sector Policies and Programs Division, Coatings and Chemicals Group

David Salman, Sector Policies and Programs Division, Coatings and Chemicals Group

David Solomon, Sector Policies and Programs Division, Program Design Group

Jodi Howard, Sector Policies and Programs Division, Coatings and Chemicals Group

Nick Parsons, Sector Policies and Programs Division, Coatings and Chemicals Group

Rachel Agnew, Sector Policies and Programs Division, Measurement Policy Group

Ken Hustvedt, Sector Policies and Programs Division, Coatings and Chemicals Group

EC/R Incorporated

Heather Brown

Phil Norwood

Robert Vogt

Phone Call-Ins

Carol Butero, Kinder Morgan

Shankar Ananthakrishna, Chevron

Janet Bounds, Chevron

Doug Henderer, Buys & Associates

IV. SUMMARY OF DISCUSSION

Mr. Henderer led the discussion with a PowerPoint presentation on the Western Regional 

Air Partnership (WRAP) Oil & Gas Emissions project (see Attachment 2). The WRAP Oil & 

Gas Emissions project focuses on the Exploration and Production segment of the Oil and Gas 

Industry in the WRAP region, which consists of Colorado, Montana, New Mexico, North 

Dakota, Utah, and Wyoming. In the WRAP Phase III analysis, Buys and Associates conducted 

detailed surveys with gas well operators in the Denver-Julesburg, Piceance, Uinta, and North San 

Juan Basins. High participation in the surveys was reported, and Buys and Associates used data 

collected from the surveys in conjunction with activity level and equipment count data from 

published sources to calculate emission estimates. Other key topics of discussion included: 

 Background of the WRAP emissions inventory project

 Comparisons of the Phase I, Phase II, and Phase III emissions estimation methodologies 

for the WRAP emissions inventory project

 Basin-specific and operation-specific variability in emissions

 Environmental Impact Studies (EIS) as a source of emissions data

 Steps moving forward