1. (a) A consecutive groundwater system O/O that has a total coliform-positive sample collected under Env-Dw 709 shall:

   1. (1) Notify the provider system(s) within 24 hours of being notified of the total coliform-positive sample; and
   2. (2) If the consecutive system has a source that supplies water to the distribution system, conduct triggered monitoring as specified in Env-Dw 717.11.

2. (b) A provider system that does not provide 4-log treatment and receives notice from a consecutive system it serves that a sample collected under Env-Dw 709 is total coliform-positive shall:

   1. (1) Collect a sample from each groundwater source and analyze each sample for E. coli and total coliform, in accordance with Env-Dw 717.05, within 24 hours of being notified of the total coliform-positive sample; and
   2. (2) Conduct all triggered monitoring as specified in Env-Dw 717.11.

3. (c) A provider system that receives notice that its groundwater source sample is E. coli positive shall:

   1. (1) Notify all consecutive systems served by the water source within 24 hours of being notified of the E. coli positive result; and
   2. (2) Conduct all triggered monitoring requirements as specified in Env-Dw 717.11.
4. (d) Documentation of notification to the provider system(s) of total-coliform positive samples that are not invalidated under Env-Dw 717.06 shall be kept for a period of at least 5 years.

Source. #9600, eff 11-21-09; ss by #12525, eff 6-1-18