1. (a) The monitoring frequency for radionuclides shall be based on the average of the results of the initial monitoring required pursuant to Env-Dw 710.06, as specified in Table 710-1 below:

   Table 710-1: Monitoring Frequency Based on Radionuclide Concentrations

   Compliance Gross Alpha (pCi/L)

   Average Monitoring Result

   Frequency

   13.5 to 15

   Yearly

   7.6 to 13.4

   Every 3 years

   3 to 7.5

   Every 6 years

   less than 3

   Every 9 years

   Radium 226 plus Radium-228 (pCi/L)

   Average Monitoring Result

   Frequency

   4.5 to 5

   Yearly

   2.6 to 4.4

   Every 3 years

   1.0 to 2.5

   Every 6 years

   less than 1.0

   Every 9 years

   Uranium (μg/L)

   Average Monitoring Result

   Frequency

   26.5 to 30

   Yearly

   15.5 to 26.4

   Every 3 years

   1 to 15.4

   Every 6 years

   less than 1

   Every 9 years

2. (b) Subsequent sample results shall be used to establish future sampling schedules using the frequencies in Table 710-1.
3. (c) Based on review of the submitted results, the department shall modify the system’s schedule in accordance with Table 710-1 and notify the CWS O/O in writing of the new monitoring requirements.

Source. #9700, eff 5-1-10; ss by #12668, eff 1-1-19