Section NR 665.0092 - Sampling and analysis(1) The owner or operator shall obtain and analyze samples from the installed groundwater monitoring system. The owner or operator shall develop and follow a groundwater sampling and analysis plan. Chemical and physical samples shall be analyzed by a laboratory certified or registered under ch. NR 149, except for field analyses for pH, specific conductance and temperature. The owner or operator shall keep this plan at the facility. The plan shall include procedures and techniques for all of the following:(b) Sample preservation and shipment.(c) Analytical procedures.(d) Chain of custody control. Note: See "Procedures Manual For Ground-water Monitoring At Solid Waste Disposal Facilities," EPA-530/SW-611, and "Methods for Chemical Analysis of Water and Wastes," EPA-600/4-79-020, for discussions of sampling and analysis procedures.
(2) The owner or operator shall determine the concentration or value of all of the following parameters in groundwater samples in accordance with subs. (3) and (4): (a) Parameters characterizing the suitability of the groundwater as a drinking water supply, as specified in ch. NR 665 Appendix III.(b) All of the following parameters establishing groundwater quality: 6. Sulfate. Note: These parameters are to be used as a basis for comparison in the event a groundwater quality assessment is required under s. NR 665.0093(4).
(c) All of the following parameters used as indicators of groundwater contamination: 4. Total organic halogen.(3)(a) For all monitoring wells, the owner or operator shall establish initial background concentrations or values of all parameters specified in sub. (2). The owner or operator shall do this quarterly for one year.(b) For each of the indicator parameters specified in sub. (2) (c), at least 4 replicate measurements shall be obtained for each sample and the initial background arithmetic mean and variance shall be determined by pooling the replicate measurements for the respective parameter concentrations or values in samples obtained from upgradient wells during the first year.(4) After the first year, all monitoring wells shall be sampled and the samples analyzed with the following frequencies: (a) Samples collected to establish groundwater quality shall be obtained and analyzed for the parameters specified in sub. (2) (b) at least annually.(b) Samples collected to indicate groundwater contamination shall be obtained and analyzed for the parameters specified in sub. (2) (c) at least semi-annually.(5) Elevation of the groundwater surface at each monitoring well shall be determined each time a sample is obtained.Wis. Admin. Code Department of Natural Resources NR 665.0092
CR 05-032: cr. Register July 2006 No. 607, eff. 8-1-06; correction in (2) (a) made under s. 13.92(4) (b) 7, Stats., Register March 2013 No. 687.