Table 5. Summary of amphipod Rhepoxynius abronius toxicity test results (mean values 

 ± standard deviation 3 ). 



Site Sample Number of Percent Avoidance Reburial d Percent 



Number Survivors b Survival Reburial e 



a n = 5 per station; all samples were tested with the Control 1 sample with the exception of 

 VA 07 and VA 08 which were tested with the Control 2 sample. 



b 20.0 = 100% survival. 



c Cumulative number of amphipods on the surface per jar per day over the 10-d exposure 

 period (out of a maximum of 20.0). 



d Number of surviving amphipods able to rebury after 1-hour exposure to control sediment 

 and bioassay water. 



e Percent reburial = (mean reburial/mean survival) x 100 



31 



