Acknowledgements 
This fifth addendum to the EPA April 2003 publication of Ambient Water Quality Criteria for 
Dissolved Oxygen, Water Clarity and Chlorophyll a for the Chesapeake Day and Its Tidal 
Tributaries (Regional Criteria Guidance) was developed and documented through the 
collaborative efforts of members of the Chesapeake Bay Program's (CBP) Criteria Assessment 
Protocols Workgroup and the Water Quality Goal Implementation Team. 
PRINCIPAL AND CONTRIBUTING AUTHORS 
The following are principal and contributing authors of this addendum: Peter Tango, U.S. 
Geological Survey/Chesapeake Bay Program Office; Jeni Keisman, University of Maryland 
Center for Environmental Science/Chesapeake Bay Program Office; Richard Batiuk, U.S. EPA 
Region 3 Chesapeake Bay Program Office; Elgin Perry, Statistical Consultant, and Jackie 
Johnson, Interstate Commission on the Potomac River Basin/Chesapeake Bay Program Office. 
CRITERIA ASSESSMENT PROTOCOL WORKGROUP 
Peter Tango, Chair, U.S. Geological Survey/Chesapeake Bay Program Office; Chery l Atkinson, 
U.S. EPA Region 3, Water Protection Division; Harry Augustine, Virginia Department of 
Environmental Quality; Mark Barath, U.S. EPA Region 3, Water Protection Division; Tom 
Barron, Pennsylvania Department of Environmental Protection; Stephen Cioccia, Virginia 
Department of Environmental Quality; Richard Eskin, Maryland Department of the 
Environment; Sherm Garrison, Maryland Department of Natural Resources; Darryl Glover, 
Virginia Department of Environmental Quality; Rick Hoffman, Virginia Department of 
Environmental Quality; Jackie Johnson, Interstate Commission on the Potomac River 
Basin/Chesapeake Bay Program Office; Jeni Keisman, University of Maryland Center for 
Environmental Science/Chesapeake Bay Program Office; Susan McDowell, United States 
Environmental Protection Agency Region III; Larry Merrill, United States Environmental 
Protection Agency; Bruce Michael, Maryland Department of Natural Resources; Ken Moore, 
Virginia Institute of Marine Science; Shah Nawaz, District Department of the Environment; 
Jennifer Palmore, Virginia Department of Environmental Quality; Tom Parham, Maryland 
Department of Natural Resources; Elgin Perry, Statistics Consultant; Charlie Poukish, Maryland 
Department of the Environment; Tish Robertson, Virginia Department of Environmental 
Quality; Matt Rowe, Maryland Department of the Environment; John Schneider, Delaware 
Department of Natural Resources and Environmental Control; Gary Shenk, United States 
Environmental Protection Agency; Donald Smith, Virginia Department of Environmental 
Quality; Scott Stoner, New York State Department of Environmental Conservation; Matt Stover, 
Maryland Department of the Environment; Bryant Thomas, Virginia Department of 
Environmental Quality; Mark Trice, Maryland Department of Natural Resources; David 
Wolanski, Delaware Department of Natural Resources and Environmental Control. 
WATER QUALITY GOAL IMPLEMENTATION TEAM 
Dave Hansen, Co-Chair, University of Delaware; Robert Koroncai, Co-Chair, U.S. 
Environmental Protection Agency Region 3 Water Protection Division; Katherine Antos, 
Coordinator, Chesapeake Bay Program Office, U.S. Environmental Protection Agency; Victoria 
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