NR 503.10(2)(d)(d) The applicant shall perform field investigations to define the subsurface soils, depth to bedrock, type of bedrock, depth to groundwater and groundwater flow direction at the proposed landfill’s location. The results of this investigation shall be described in the narrative section of the report. All raw data collected for borings, well construction and borehole abandonment shall be submitted on forms in accordance with s. NR 507.14 (5). All raw data for laboratory tests and water level measurements shall be included in the report appendix. At a minimum, the investigations specified in subds. 1. to 4. shall be performed unless an alternative geotechnical investigation program is approved by the department in writing before the geotechnical investigation program for the report is initiated. Documentation of any alternative geotechnical investigation approved by the department and justification for any reductions to the requirements in this section shall be included in the report. At a minimum, the field investigation shall include the following:

NR 503.10(2)(d)1.1. As specified in Table 2, borings shall be drilled in 5 separate locations for the first 20 or less acres of the anticipated limits of filling and one additional boring shall be drilled for each additional 10 or less acres. All borings shall be extended a minimum of 25 feet below the anticipated sub-base grade. If the boring is located outside the anticipated limits of filling, the applicable sub-base grade is the elevation of the bottom of the anticipated liner system nearest to the borehole. The borings shall be distributed on a grid pattern across the proposed site location and the anticipated limits of filling. All borings shall be located in or within 300 feet of the anticipated limits of filling. Samples shall be collected and retained and boring logs shall be prepared in accordance with s. NR 507.05 (2) and (3). Borings not converted to wells shall be abandoned in accordance with ss. NR 141.25 and 507.08.

NR 503.10(2)(d)2.a.a. At a minimum, 3 water table observation wells shall be installed for the first 20 or less acres of the anticipated limits of filling and one additional water table observation well shall be installed for each additional 10 or less acres. Based on existing information, the observation wells shall be constructed such that the water table intersects the well screen at all times during the year.

NR 503.10(2)(d)2.b.b. At a minimum, in a fine-grained soil environment for each 20 or less acres of the anticipated limits of filling, a piezometer shall be installed adjacent to a water table observation well to create a well nest.

NR 503.10(2)(d)2.c.c. All wells shall be located no more than 300 feet from the proposed limits of filling and be designed, installed, developed and documented in accordance with ch. NR 141 and ss. NR 507.06, 507.07 and 507.08. Alternative methods of well design and installation which achieve comparable results shall be approved by the department prior to well construction.

NR 503.10(2)(d)3.3. A professional geologist or qualified technician who is directly supervised by a professional geologist shall observe and direct the drilling of all borings and the installation, development and abandonment of all wells. The professional geologist or qualified technician who is directly supervised by a professional geologist shall also visually describe and classify all geologic samples.

NR 503.10(2)(d)4.a.a. Include testing a minimum of one representative sample from each major soil unit encountered. Each representative sample shall be analyzed for grain-size distribution using mechanical and hydrometer methods and Atterberg limits as appropriate for the particular type of material and be classified according to the unified soil classification system.

NR 503.10(2)(d)4.b.b. All available groundwater or surface water quality data which has been obtained from sampling at the proposed landfill location shall be submitted in the report. Any environmental monitoring data included in the report shall be submitted electronically.

NR 503.10(2)(e)(e) Unless an alternative size is approved by the department, the results of the subsurface investigations shall be presented on 24 inch x 36 inch plan sheets as follows:

NR 503.10(2)(e)1.1. A topographic map of the area within 1/4 mile of the anticipated limits of filling shall be submitted showing the anticipated limits of filling, property boundaries, homes, buildings, cultural features, water supply wells, and the location of soil borings and wells. For a proposed contiguous, horizontal or vertical expansion of an existing landfill, the topographic map shall also include the location of all borings and wells for the existing landfill. The base map may consist of an enlarged 7.5 minute USGS map or other map having a minimum scale of 1″= 500¢ with contour intervals sufficient to show relief.

NR 503.10(2)(e)2.2. Geologic cross-sections shall be submitted. For a proposed contiguous, horizontal or vertical expansion of an existing landfill, all borings and wells for the existing landfill shall be included on the geologic cross-sections. Where more than one interpretation can be reasonably made when evaluating heterogeneities within the unconsolidated deposits, assume that the heterogeneities are continuous. The following information shall be presented on the geologic cross-sections:

NR 503.10(2)(e)2.d.d. Well construction details shown to scale including the well screen and filter pack length, the location of the upper and lower seals, and stabilized water level elevations measured on the same day. When 2 or more water table observation wells are presented on a cross-section, a line representing the water table elevation shall be drawn. The date the measurements were taken shall be specified in the key.

NR 503.10(2)(e)3.3. A water table contour map shall be submitted. The map shall be based on stabilized water levels recorded on the same day from all observation wells installed at the proposed landfill’s location and show the wells and the measured water level at each well. For a proposed contiguous, horizontal or vertical expansion of an existing landfill, the water table contour map shall include the water table observation wells and measured water table elevations at each well for the existing landfill. The topographic map shall be used as a base map. If more than one set of water levels has been taken, the water table contours shall be based on the set of data which indicates the highest water table. Any observed variations in flow direction shall be discussed in the narrative of the report. Inferred contours made beyond the extent of the well field shall be shown with dashed lines.