Section NR 809.329 - Reporting and recordkeeping requirements for groundwater systems(1) REPORTING. In addition to the requirements of ss. NR 809.31 and 809.80, a water supplier for a groundwater system regulated under s. NR 809.32 shall provide the following information to the department:(a) A water supplier for a groundwater system conducting compliance monitoring under s. NR 809.327(3) shall notify the department any time the public water system fails to meet any department-specified requirements including, but not limited to, minimum residual disinfectant concentration, membrane operating criteria or membrane integrity, and alternative treatment operating criteria, if the operation is not restored in accordance with the criteria or requirements within four hours. The water supplier shall notify the department as soon as possible, but in no case later than the end of the next business day after the failure.(b) After completing any corrective action under s. NR 809.327(2), a water supplier shall notify the department within 30 days of completion of the corrective action.(2) RECORDKEEPING. In addition to the requirements of s. NR 809.80, a water supplier for a public water system regulated under s. NR 809.32 shall maintain the following information in its records:(a) Documentation of corrective actions. Documentation shall be kept for a period of not less than ten years.(b) Documentation of notice to the public as required under s. NR 809.80. Documentation shall be kept for a period of not less than three years.(c) Records of decisions under s. NR 809.325(4) and records of invalidation of an E. coli-positive groundwater source sample under s. NR 809.323(2). Documentation shall be kept for a period of not less than five years.(d) For consecutive systems, documentation of notification to its wholesale systems of total-coliform positive samples that are not invalidated under s. NR 809.31(3). Documentation shall be kept for a period of not less than five years.(e) For public water systems, including wholesale systems, which are required to perform compliance monitoring under s. NR 809.327(4) all of the following apply: 1. Records of the department specified minimum disinfectant residual. Documentation shall be kept for a period of not less than ten years.2. Records of the lowest daily residual disinfectant concentration and records of the date and duration of any failure to maintain the department prescribed minimum residual disinfectant concentration for a period of more than four hours. Documentation shall be kept for a period of not less than five years.3. Records of department-specified compliance requirements for membrane filtration and of parameters specified by the department for department-approved alternative treatment and records of the date and duration of any failure to meet the membrane operating, membrane integrity, or alternative treatment operating requirements for more than 4 hours. Documentation shall be kept for a period of not less than five years.Wis. Admin. Code Department of Natural Resources NR 809.329
CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.Amended by, CR 15-049: am. (2) (c), (d), (e) (intro.) Register March 2016 No. 723, eff.4/1/2016