365 



Notes to Table 



1/ In contracting and licensing the ocean dumping of radioactive 

 ~ wastes, the AEC designated general areas for approved dumping. In 

 some instances these areas were identified by single coordinates and 

 the wastes were concentrated in relatively specific areas, while in 

 other instances the AEC designated much broader areas and allowed 

 those dumping to proceed according to general guidelines. Dumping 

 under these designations resulted in much less concentrated dumping 

 activities and a multitude of individual "dumpsites". The number of 

 such individual dumpsites under a particular heading in this column 

 is indicated in parentheses. The designation Al through A12, GMl 

 and GM2, and PI through P13 refer to the NRC site numbering system. 



2/ Central coordinates designate dumping areas thought to have received 

 ~ concentrations of waste materials. Actual coordinates may have 

 varied over wider distances. 



V Approximations for land references: an asterisk means that EPA has 

 not plotted the coordinates on nautical charts to confirm the stated 

 distance from land; blanks mean we haven't found the information yet. 



4/ Three types of materials were dumped under AEC licenses or by AEC 

 ~ contractors: by-product materials (B), source materials (S), and 

 special nuclear materials (SNM). By-product materials refer to a 

 wide variety of substances which were exposed to incidental 

 radiation. Source materials include uranium and thorium. Special 

 nuclear materials include plutonium, uranium-233, enriched 

 uranium-233 or 235, and any other materials which the AEC may have 

 determined to be special nuclear materials. 



5_/ Radioactivity is given in estimated curies at the time of packaging. 



6^/ Waste materials were generally either packaged in special containers 

 which were then placed in concrete-filled steel drums, or mixed 

 directly in concrete which was in turn placed in the steel drums. 



