) 
The resulting deep-water biologically-based reference curve for dissolved oxygen assessment is 
illustrated in Chapter 3, Figure 111-4 of this addendum and defined as: 
X 
Y 
(violation 
(plotting 
rate) 
position) 
0 
1 
0 
0.923077 
0 
0.846154 
0 
0.769231 
0.025641 
0.692308 
0.029132 
0.615385 
0.051185 
0.538462 
0.200524 
0.461538 
0.246642 
0.384615 
0.271513 
0.307692 
0.356639 
0.230769 
0.402786 
0.153846 
0.555376 
0.076923 
1 
0 
LITERATURE CITED 
Llanso, R.J., D.M. Dauer and J.H. Volstad. 2009. Assessing ecological integrity for impaired 
waters decisions in Chesapeake Bay, USA. Marine Pollution Bulletin 59:48-53 
U.S. Environmental Protection Agency. 2007. Ambient Water Quality Criteria for Dissolved 
Oxygen, Water Clarity and Chlorophyll a for the Chesapeake Bay and Its Tidal Tributaries - 
2007 Addendum. July 2007. EPA 903-R-07-003. Region III Chesapeake Bay Program Office, 
Annapolis, MD. 
U.S. Environmental Protection Agency. 2008. Ambient Water Quality Criteria for Dissolved 
Oxygen, Water Clarity and Chlorophyll a for the Chesapeake Bay and Its Tidal Tributaries 2008 
Technical Support for Criteria Assessment Protocols Addendum. September 2008. EPA 903-R- 
08-001. Region III Chesapeake Bay Program Office, Annapolis, MD. 
) 
51 
