Ill. Admin. Code tit. 32, § 351.APPENDIX B
Example of Plaque for Identifying Wells Containing Sealed Sources Containing Radioactive Material Abandoned Downhole
AUTHORITY: Implementing and authorized by Sections 9, 10, 11, 16, and 29 of the Radiation Protection Act of 1990 [420 ILCS 40].ILLINOIS EMERGENCY MANAGEMENT AGENCY AND OFFICE OF HOMELAND SECURITY
![[COMPANY NAME] [WELL IDENTIFICATION] CAUTION ONE 74 GIGABECQUEREL (2 CURIE) CS-137 RADIOACTIVE SOURCE ABANDONED 3-3-92 AT 2560 METERS (8400 FEET) PLUG BACK DEPTH 2500 METERS (8200 FEET) DO NOT RE-ENTER THIS WELL BEFORE CONTACTING THE ILLINOIS EMERGENCY MANAGEMENT AGENCY](https://ilga.gov/commission/jcar/admincode/032/03200351ZZ9996BR_files/image001.png)
The size of the plaque should be convenient for use on active or inactive wells, e.g., a 17-centimeter (7-inch) square and 3 mm (⅛ inch) thick. Letter size of the word "CAUTION" should be approximately twice the letter size of the rest of the information, e.g., 12-millimeter (½-inch) and 6-millimeter (¼-inch) letter size, respectively. Quantities and distances may be expressed either in SI units or in special and English units or in dual units.