1. (a) The O/O of a new CWS or an existing CWS using a new source of supply shall collect and analyze:

   1. (1) One sample for radon prior to using water from the new source; and
   2. (2) Quarterly samples for compliance gross alpha, combined radium-226 and radium-228, and uranium as specified in the schedule established pursuant to Env-Dw 708.

2. (b) Initial monitoring shall:

   1. (1) Begin within the first quarter that the new system or source first provides water to the system; and
   2. (2) Be performed in accordance with Env-Dw 710.06.
3. (c) The O/O of a new non-transient, non-community water system or an existing non-transient, non-community water system using a new source of supply shall collect and analyze one sample for compliance gross alpha, combined radium-226 and radium-228, and uranium prior to using water from the new source.

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