NR 716.15(2)(c)7.7. The geographic positions of all properties within and partially within the contaminated site boundaries, which have been directly located or interpolated from other features on a base map of 1:24000 scale or finer, or which were obtained using differentially corrected global positioning system data or another method of similar or superior accuracy that have been approved by the department. The geographic position data shall be obtained and submitted to the department in accordance with the requirements in sub. (5) (d).

NR 716.15(2)(d)(d) Background information. Descriptions of the following:

NR 716.15(2)(d)1.1. Activities or events at or near the site or facility which had the potential to affect public health, safety, or welfare or the environment, including time, duration, type, and amounts of hazardous substance discharges.

NR 716.15(2)(e)(e) Methods of investigation. Descriptions of investigative techniques used to characterize the site or facility, including subsurface boring and probe methods; monitoring well construction, installation, and development procedures; well and aquifer testing methods; modeling techniques; sample collection, handling, and analysis techniques; and leak detection methods. Where procedures were performed in accordance with methods described in a work plan for the same investigation that was previously submitted to the department or in exact accordance with published departmental guidance, the site investigation report may omit detailed descriptions by referring to the work plan or the department guidance in which the methods were described. Where procedures differed from methods described in the work plan, the site investigation report shall include a description of the procedures used.

NR 716.15(3)(3) Results. The site investigation report shall include a detailed narrative description of the results of the site investigation, references to all appropriate visual aids under sub. (4), and shall include all of the following:

NR 716.15(3)(a)(a) The information collected during the scoping stage of the investigation conducted pursuant to s. NR 716.07.

NR 716.15(3)(b)(b) A description of the sequence of activities that took place during the site investigation.

NR 716.15(3)(c)(c) All field measurements, observations, and sampling data generated during the site investigation, including data from non–laboratory sample analyses. Laboratory data shall include laboratory name, location from which each sample was obtained, date each sample was obtained, date each sample was extracted and analyzed, analytical method used by the laboratory, parameters tested for, the method detection limit, the analytical result for each sample, and whether other compounds not specifically tested for were observed in significant quantities. Relevant and significant sample results and field measurements shall be compiled in tabular form and at corresponding sampling locations noted on a site layout map.

NR 716.15(3)(d)(d) Where laboratory results are significantly inconsistent with field observations or non–laboratory method results, a clear evaluation of the reason for the inconsistency and an indication of whether resampling or additional quality control procedures are needed.

NR 716.15(3)(e)(e) For sites or facilities with 3 or more water table observation wells, a discussion of the depth to the water table, groundwater flow directions, rates, and any variations.

NR 716.15(3)(f)(f) A discussion of the stratigraphy of the site. Identify soil and rock types at the site and the contaminant source location. Include a description of moisture contents, high and low water table elevations, and the location of any smear zone.

NR 716.15(3)(g)(g) A discussion of the contaminants and impacts on each environmental medium.

NR 716.15(3)(h)(h) Interpretations of the data generated at the site or facility sufficient to characterize the geologic and hydrogeologic characteristics of the site or facility, the areal and vertical degree and extent of hazardous substances in all environmental media, and the impacts of the contamination to all potential receptors.

NR 716.15(3)(i)(i) The hydraulic conductivity of materials where contaminated groundwater is found.

NR 716.15(4)(4) Visual aids. The site investigation report shall include all maps, figures, tables, graphs, photographs, and completed forms that are necessary to clarify and support results and interpretations. Visual aids shall present information in legible formats, shall be referenced in the report text, and shall meet all of the following requirements:

NR 716.15(4)(a)(a) General Requirements. Maps, plan sheets, drawings, cross sections and fence diagrams shall:

NR 716.15(4)(a)2.2. Have a figure number, title, north arrow, and legend of all symbols used, contain graphic horizontal and vertical scales, specify drafting or origination dates, and indicate the source if not an original design.

NR 716.15(4)(b)(b) Water table and potentiometric surface maps. For water table maps and potentiometric surface maps, depict water level elevations measured on the same day, indicate the date of measurement on the map, and indicate apparent flow direction.

NR 716.15(4)(b)1.1. For sites or facilities with 3 or more water table observation wells, include a map depicting the elevation of the water table and the apparent direction of groundwater flow, with additional water table maps as necessary to depict significant variations in water table elevation or groundwater flow direction.

NR 716.15(4)(b)2.2. For potentiometric surface maps, additionally depict measurements taken from piezometers with similar screen lengths that intersect the same geologic zone and depth, and indicate any vertical gradients as well as the location and type of any confining layers. For sites with 3 or more piezometers, include a potentiometric surface map, with the apparent direction of groundwater flow, with additional potentiometric maps as necessary to depict significant variation in levels or flow direction.

NR 716.15(4)(c)(c) Isoconcentration maps. For isoconcentration maps, depict the hazardous substances, concentrations, the environmental medium, the date measured and the unit of measurement. Submit isoconcentration maps of hazardous substance concentrations in each environmental medium, as appropriate to the scope and complexity of the site and where sufficient data are available to estimate meaningful isoconcentrations. For groundwater, use the appropriate groundwater elevation map as the base map.