Radioactivity

Section 302 Section 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.