Section Env-Dw 717.11 - Triggered Monitoring(a) A groundwater system that does not provide at least 4-log treatment shall be subject to the triggered monitoring requirements specified in (b) through (e), below, upon being notified that a valid sample collected under the requirements of Env-Dw 709.02 is total coliform-positive.(b) Within 24 hours of notification of the total coliform-positive sample, the O/O of the groundwater system shall collect at least one groundwater source sample from each groundwater source in use at the time the total coliform-positive sample was collected and have each sample analyzed for E. coli and total coliform as specified in Env-Dw 717.05.(c) The O/O may request an extension of the 24-hour time limit in accordance with Env-Dw 717.12 if the O/O is unable to collect the samples due to circumstances beyond the O/O's control.(d) If the valid sample is E. coli positive, the O/O of the groundwater system shall:(1) Institute a boil order in accordance with Env-Dw 709.19, and(2) Provide notice in accordance with the public notice requirements in Env-Dw 717.23.(e) If the valid sample taken pursuant to (b), above, is E. coli positive, the O/O of the groundwater system shall: (1) Conduct corrective action if directed by the department in accordance with Env-Dw 717.21; or(2) If the department determines that the appropriate corrective action is not readily apparent, collect 5 additional source water samples from the same source within 24 hours of being notified of the positive E. coli result and have them analyzed for E. coli and total coliform bacteria as specified in Env-Dw 717.05.N.H. Code Admin. R. Env-Dw 717.11
Amended by Volume XXXVIII Number 23, Filed June 7, 2018, Proposed by #12525, Effective 6/1/2018, Expires 6/1/2028.