372 



E. J. CAVANAUGH 

 '*rhese studies demonstrate quite dramatically 

 that a well balanced nnarine community exists on and over 

 the area of deposition offshore from the Fibreboard mill. 

 As a result^we have concluded that the marine environment 

 has not been adversely affected by deposition from the 

 waste discharge. Under these conditions mechanical re- 

 moval would not improve the bottom environment and could 

 cause adverse conditions during the extended period which 

 would be required for such an operation. 



"Effects of Proposed Submarine Discharge. 



"Because its density is much less than that 

 of seawater, waste water discharges at or near the surface 

 form a relatively thin layer. During the 1961 study it 

 was found that clear underlying seawater was brought to 

 the surface by a small boat's propeller. Such a surface 

 is exposed to wind and wave action and, therefore, tends 

 to disperse quite rapidly. The immediate oxygen demand of 

 the waste is met by surface reaeration and by dilution in 

 the surface waters. 



"Accordingly, it has a negligible effect on 

 dissolved oxygen levels in the great mass of underlying 

 seawater. This conclusion is attested to by the observa- 

 tion of marine life reported in the preceding paragraphs. 



"The question arises as to the relative merits 



