Section 302.525  Radioactivity

Except as provided in Section 302.102, all waters of the Lake Michigan Basin must meet the following concentrations:

a)         Gross beta (STORET number 03501) concentrations must not exceed 100 picocuries per liter (pCi/L).

b)         Strontium 90 (STORET number 13501) concentration shall not exceed 2 (pCi/L).

c)         The annual average radium 226 and 228 (STORET number 11503) combined concentration must not exceed 3.75 picocuries per liter (pCi/L).

(Source:  Amended at 30 Ill. Reg. 4919, effective March 1, 2006)