Table 4.1. Toxicity of porewater to Ceriodaphnia dubia (48-hour LC50, 

 reported as a % of porewater in test solution, and as toxic units, 

 100/LC50). 



Notes: 



a. >100 indicates that 100% porewater did not kill at least half the 

 test organisms in 48 hours. 



b. Dashes ( ) indicate that toxic units could not be calculated 



because porewater was not lethal within the 48-hour exposure period. 



c. Numbers in parentheses indicate range of dilutions that caused 50% 

 mortality in 48 hours (48-hour LC50s). 



NS=not sampled 



30 



