J-5 
Table J-1. (continued) 
n<10 - small sample size, insufficient for analysis 
Impairment Analysis 
Stressor Diagnostic Analyses 
Scenario 
CL-L 
(P-Po) 
(Table 3 of 
VERSAR 
Technical 
Report) 
Impaired: 
Degraded 
Area? (Table 3 
of VERSAR 
Technical 
Report) 
Samples with 
contaminant 
Posterior Prob. 
p>= 0.90; % of 
Total (Table 5 of 
VERSAR 
Technical 
Report) 
Degraded Samples with 
excessive 
Abundance/Biomass; % of 
Total w/o Cont. (Table 5 of 
VERSAR Technical Report) 
Degraded Samples with Insufficient 
Abundance/Biomass; % of Total w/o 
Cont. (Table 5 of VERSAR Technical 
Report) 
1 
n/a 
Unknown, Not 
Assessed 
review as 
supplemental info 
review as supplemental info 
review as supplemental info 
• There are too few samples to define the confidence interval of benthic sample IBIs, so in this segment - the biological community condition is 
unknown 
• Where community samples are identified as degraded, information from the stressor diagnostic analyses may provide supplemental information 
that may support other assessment data 
LITERATURE CITED 
Llanso, R.J. 2002. Methods for Calculating the Chesapeake Bay Benthic Index of biotic 
Integrity. Versar Inc., Columbia, Maryland http://www.baybenthos.versar.com/docs/Ches- 
BayBIBI.PDF 
Llanso , R.J., J.H. Volstad, D.M. Dauer, and M.F. Lane. 2005. 2006 303(D) Assessment 
Methods For Chesapeake Bay Benthos. Final Report Submitted to Virginia Department of 
Environmental Quality, Richmond, Virginia. September 2005. 
appendix i 
Evaluation of SAV Acreages from 2003 to 2005 for Prioritizing Shallow-water Monitoring 
