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Office of News and Information
212 Whitehead Hall / 3400 N. Charles Street
Baltimore, Maryland 21218-2692
Phone: (410) 516-7160 / Fax (410) 516-5251

November 30, 1994
CONTACT: Ken Keatley

Ellis to Comment on EPA Pollution Control Plan Decision

Last week, the Environmental Protection Agency announced it would delay until December a decision on whether to approve a pollution-control plan proposed by the Ozone Transport Commission. A 12-state coalition developing air pollution control strategy for the Northeast, the OTC is recommending that the EPA require the implementation of the "California cars" emission requirements throughout the region.

When the EPA decision is rendered, an expert on abatement strategy alternatives at Johns Hopkins University will be available for comment. J. Hugh Ellis, professor of environmental engineering, issued a report in January, "An Analysis of Ozone Control Strategies of Maryland," in which he concluded that the Federal Tier II Vehicle guidelines rather than the California Low Emission Vehicle Program would be more cost effective in Maryland.

The state Department of the Environment, which had requested the report, did not follow his recommendation. Instead, it and other members of the Ozone Transport Commission requested that the EPA implement the more stringent "California cars" program.

For much of his work, Dr. Ellis uses complex mathematics to determine the most cost-effective methods for reducing air pollution, acid rain or other environmental problems in a particular region. His mathematical models are also useful in the design and placement of monitoring networks for groundwater and air pollution.

Dr. Ellis serves on the Maryland Air Quality Control Advisory Council and the Committee for Measuring and Improving Infrastructure Performance, part of the National Research Council's Commission on Engineering and Technical Systems. He is a member of the Baltimore/Washington Urban Airshed Modelling Technical Advisory Group.

You may contact Dr. Ellis through my office, or by calling him at (410) 516-6537. His E-mail address is hellis@jhuvms.hcf.jhu.edu

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