Ill. Admin. Code tit. 35, § 302.207 - Radioactivity
a) Gross beta concentration must not exceed 100 picocuries per liter (pCi/L).
b) Strontium 90 concentration must not exceed 2 pCi/L.
c) The annual average radium 226 and 228 combined concentration must not exceed 3.75 pCi/L.
Notes
Amended at 30 Ill. Reg. 4919, effective March 1, 2006
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