VI-236 



techniques have been developed these studies should be expanded to 

 include pathoqenic viruses. 



Interactions Between Floatable and Settleable 

 Components of Wastes and Physical Factors 



Floatables are defined here as those materials which appear at the 

 air-water interface. These materials may appear in the form of float- 

 ing particulate matter (detritus), surface films (monolayers, duplex, 

 or lenses), scum, and foam. 



(1) Studies should be conducted to ascertain the prevalence, 

 properties and character of floatables of wastewater and 

 sludqe origin (including barged materials) in coastal waters 

 and in estuaries. The substances comprising the various 

 forms of the floatables (particulate matter, films, scum, 

 and foam) should be identified as to primary source. 



(2) Investigations should be made to determine the means 

 by which the floatables are collected and compressed into 

 slicks or streaks on the water surface as well as the 

 natural mechanisms available for transporting the materials 

 in the water, surface. 



(3) Studies should be made to ascertain methods of treating 

 or handling the wastewaters and sludges to reduce or eliminate 

 problems of surface pollution. 



