L-6 
Table 2. Percent of the Elizabeth River 1999 strata placed into the sediment 
contaminant effect group using the contaminant discriminant function of 
Dauer et al. 2002 (posterior probability > 0.5). Scuffletown, Gilligan, Jones, 
and Paradise creeks are subsystems of the Southern Branch. Paradise Creek 
sampled in 2000. The Elizabeth River strata are compared to the Virginia 
Mainstem Stratum. 
Stratum 
Percentage of Stratum 
in Contaminant Group 
Mainstem of the Elizabeth River 
40 
Lafayette River 
60 
Eastern Branch 
64 
Western Branch 
72 
Southern Branch 
64 
Scuffletown Creek 
60 
Gilligan/Jones Creek 
68 
Paradise Creek (2000) 
92 
Entire Elizabeth River watershed* 
54 
Virginia Mainstem 
11 
* Area weighted value 
> 0.5 
100 
Figure 1. Percentage of stratum with a B-IBI value < 2.7 and placed into the 
Contaminant Group with a posterior probability > 0.5. 
appendix I 
Addendum to the Report 
