230 



BIRGE 



TABLE 5 

 METAL CONCENTRATIONS FOR FLY-ASH EFFLUENT 



*Mean values with standard errors were based on analyses taken at 1- to 3-day intervals. 



100 200 300 



FLY ASH LEACHING TIME, hr 



400 



500 



Fig. 2 Leaching patterns for fly-ash metals. 



the distilled— deionized influent water used for the first 770 hr, and 

 background values for the carbon-filtered tap water are given in 

 Table 5. 



Bioassay Analysis of Fly-Ash Effluent 



Four sets of embryo— larval bioassays were performed on fly-ash 

 effluent by use of a continuous-flow system. Tests were initiated 



