1. (a) Each O/O shall monitor for microbiological contaminants as specified in Env-Dw 707, Env‑Dw 708, and Env-Dw 709.

2. (b) Any of the following shall constitute an exceedance of the Escherichia coli (E. coli) MCL:

   1. (1) The system has an E. coli-positive repeat sample following a total coliforms-positive routine sample;
   2. (2) The system has an E. coli-positive or total coliforms-positive repeat sample following an E. coli‑positive routine sample;
   3. (3) The system fails to take all required repeat samples following an E. coli-positive routine sample; or
   4. (4) The system fails to test for E. coli when any repeat sample tests positive for total coliform.
3. (c) Upon completing all monitoring required for each sampling period, an O/O shall determine compliance with the E. coli MCL and the microbiological MCLGs and whether any coliform triggers have been exceeded, as specified in Env-Dw 707, Env-Dw 708, and Env-Dw 709.

Source. #9699, eff 5-1-10; ss by #12665, eff 1-1-19