before location of any plant producing large quantities of waste, 

 remembering that there are large sectors of the country where dis- 

 posal is not possible. 



7. Continuing disposal of certain /large volume/ lo-v level 

 waste in the vadose water zone, above the water table, is of limited 

 application and probably involves unacceptable long term risks. 



GENERAL RECOMMENDATIONS ON COROLLARY PROBLEMS 



1. The movement of gross quantities of fluids through porous 

 media is reasonably well understood by hydrologists and geologists, 

 but whether this is accomplished by forward movement of the whole 

 fluid mass at low velocity or whether the transfer is accomplished 

 by rapid flow in "ribbons", is not known. In deep disposal of waste 

 in porous media it will in many cases be essential to know which of 

 these conditions exists. This will be a difficult problem to solve. 



2. The education of a considerable number of geologists and 

 hydrologists in the characteristics of radioactive wastes and its 

 disposal problems is going to be necessary. 



