NR 665.0093(3)(b)(b) If the comparisons for downgradient wells made under sub. (2) show a significant increase (or pH decrease), the owner or operator shall then immediately obtain additional groundwater samples from those downgradient wells where a significant difference was detected, split the samples in 2 and obtain analyses of all additional samples to determine whether the significant difference was a result of laboratory error. NR 665.0093(4)(a)(a) If the analyses performed under sub. (3) (b) confirm the significant increase (or pH decrease), the owner or operator shall provide written notice to the department—within 7 days of the date of the confirmation—that the facility may be affecting groundwater quality. NR 665.0093(4)(b)(b) Within 15 days after the notification under par. (a), the owner or operator shall develop and submit to the department a specific plan, based on the outline required under sub. (1) and certified by a qualified geologist or geotechnical engineer, for a groundwater quality assessment program at the facility. This plan shall be placed in the facility’s operating record and be maintained until closure of the facility. NR 665.0093(4)(c)2.2. Sampling and analytical methods for those hazardous wastes or hazardous waste constituents in the facility. NR 665.0093(4)(c)3.3. Evaluation procedures, including any use of previously-gathered groundwater quality information. NR 665.0093(4)(d)(d) The owner or operator shall implement the groundwater quality assessment plan which satisfies the requirements of par. (c), and, at a minimum, determine all of the following: NR 665.0093(4)(d)1.1. The rate and extent of migration of the hazardous waste or hazardous waste constituents in the groundwater. NR 665.0093(4)(d)2.2. The concentrations of the hazardous waste or hazardous waste constituents in the groundwater. NR 665.0093(4)(e)(e) The owner or operator shall make the first determination under par. (d) as soon as technically feasible, and, within 15 days after that determination, submit to the department a written report containing an assessment of the groundwater quality. This report shall be placed in the facility’s operating record and be maintained until closure of the facility. NR 665.0093(4)(f)(f) If the owner or operator determines, based on the results of the first determination under par. (d), that no hazardous waste or hazardous waste constituents from the facility have entered the groundwater, then the owner or operator may reinstate the indicator evaluation program described in s. NR 665.0092 and sub. (2). If the owner or operator reinstates the indicator evaluation program, the owner or operator shall so notify the department in the report submitted under par. (e). NR 665.0093(4)(g)(g) If the owner or operator determines, based on the first determination under par. (d), that hazardous waste or hazardous waste constituents from the facility have entered the groundwater, then the owner or operator: NR 665.0093(4)(g)1.1. Shall continue to make the determinations required under par. (d) on a quarterly basis until final closure of the facility, if the groundwater quality assessment plan was implemented prior to final closure of the facility. NR 665.0093(4)(g)2.2. May cease to make the determinations required under par. (d), if the groundwater quality assessment plan was implemented during the long-term care period. NR 665.0093(5)(5) Notwithstanding any other provision of this subchapter, any groundwater quality assessment to satisfy the requirements of sub. (4) (d) which is initiated prior to final closure of the facility shall be completed and reported in accordance with sub. (4) (e). NR 665.0093(6)(6) Unless the groundwater is monitored to satisfy the requirements of sub. (4) (d), at least annually the owner or operator shall evaluate the data on groundwater surface elevations obtained under s. NR 665.0092 (5) to determine whether the requirements under s. NR 665.0091 (1) for locating the monitoring wells continues to be satisfied. If the evaluation shows that s. NR 665.0091 (1) is no longer satisfied, the owner or operator shall immediately modify the number, location or depth of the monitoring wells to bring the groundwater monitoring system into compliance with s. NR 665.0091 (1). NR 665.0093 HistoryHistory: CR 05-032: cr. Register July 2006 No. 607, eff. 8-1-06; correction in (2) made under s. 13.92 (4) (b) 7., Stats., Register March 2013 No. 687; CR 16-007: am. (4) (b), (e) Register July 2017 No. 739, eff. 8-1-17. NR 665.0094(1)(a)(a) Keep records of the analyses required in s. NR 665.0092 (3) and (4), the associated groundwater surface elevations required in s. NR 665.0092 (5) and the evaluations required in s. NR 665.0093 (2) throughout the active life of the facility, and, for disposal facilities, throughout the long-term care period as well. NR 665.0094(1)(b)(b) Report all of the following groundwater monitoring information to the department: NR 665.0094(1)(b)1.1. During the first year when initial background concentrations are being established for the facility: Concentrations or values of the parameters listed in s. NR 665.0092 (2) (a) for each groundwater monitoring well within 15 days after completing each quarterly analysis. The owner or operator shall separately identify for each monitoring well any parameters whose concentration or value has been found to exceed the maximum contaminant levels listed in ch. NR 665 Appendix III. NR 665.0094(1)(b)2.2. Annually: Concentrations or values of the parameters listed in s. NR 665.0092 (2) (c) for each groundwater monitoring well, along with the required evaluations for these parameters under s. NR 665.0093 (2). The owner or operator shall separately identify any significant differences from initial background found in the upgradient wells, in accordance with s. NR 665.0093 (3) (a). During the active life of the facility, this information shall be submitted no later than March 1 following each calendar year. NR 665.0094(1)(b)3.3. No later than March 1 following each calendar year: Results of the evaluations of groundwater surface elevations under s. NR 665.0093 (6), and a description of the response to that evaluation, where applicable. NR 665.0094(2)(a)(a) Keep records of the analyses and evaluations specified in the plan, which satisfies the requirements of s. NR 665.0093 (4) (c), throughout the active life of the facility, and, for disposal facilities, throughout the long-term care period as well.