Register July 2002 No. 559
APPENDIX K
Example of Plaque for Identifying Wells Containing Sealed Sources
Containing Radioactive Material Abandoned Downhole
The size of the plaque should be convenient for use on active or inactive wells, e.g., a 17-cm (7-inch) square and at least 3 mm (1/8D) thick. Letter size of the word “CAUTION” should be approximately twice the letter size of the rest of the information, e.g., 2-inch and 1-inch letter size, respectively.