Ground surface contour lines at an interval appropriate for the conditions present;
The floodplain elevation, if established, and current surface elevation of any adjacent navigable waters or reservoir; and
The existing grade adjacent to the groundwater elevation observation pipe, the top of the observation pipe, and the bottom of the observation pipe.
(b) Soil report.
A soil evaluation report shall include at least all of the following:
SPS 385.40 History
Cr. Register, April, 2000, No. 532
, eff. 7-1-00; CR 02-129
: am. (3) (a) 3. (intro) Register January 2004 No. 577
, eff. 2-1-04; correction in (3) (b) 4. made under s. 13.92 (4) (b) 7.
, Stats., Register December 2011 No. 672
; CR 17-065: am. (2) (b) 1. a. Register June 2018 No. 750, eff. 7-1-18.
A governmental unit shall review all soil evaluation reports and site evaluation reports within 6 months of receipt.
Upon completing the review of a soil evaluation report a governmental unit shall accept the report, reject the report, request additional information or clarification, or require verification under sub. (2)
When a report is deemed acceptable, a governmental unit shall so indicate on the report and file the report for future reference.
If the report is not acceptable, a governmental unit shall notify the submitter in writing and shall state the deficiencies or actions, or both, necessary to bring the report into compliance with this chapter or ch. SPS 383
The governmental unit or the department may require the property owner or the certified soil tester to provide soil pits in accordance with s. SPS 385.20 (3)
for verification of soil profile evaluation data.
The certified soil tester who is responsible for the soil report shall be present at the site during the verification of soil profile evaluation data if so requested by the governmental unit or the department.
Soil verifications may not be conducted under adverse weather or light conditions that may lead to inaccurate results.
The governmental unit or the department may require the property owner or certified individual who prepared the site report to provide assistance and equipment to verify site conditions.
The certified individual who is responsible for the site report shall be present at the site during the verification of site conditions if so requested by the governmental unit or department.
The governmental unit or the department shall complete a written report for each soil or site verification completed, and the results or findings of the report shall be filed with the soil and site evaluation report for future reference.
SPS 385.50 History
Cr. Register, April, 2000, No. 532
, eff. 7-1-00; correction in (1) (d), (2) (a) 1. made under s. 13.92 (4) (b) 7.
, Stats., Register December 2011 No. 672
SPS 385.60 Soil saturation determinations. SPS 385.60(1)(a)(a)
A property owner, or the owner's agent, may submit documentation to prove that redoximorphic features, or other soil color patterns, at a particular site are not indicative of periodically saturated soil conditions or high groundwater elevation.
Documentation shall be in the form of an interpretive determination, soil saturation determination, hydrograph procedure or artificially controlled navigable water determination pursuant to this section.
A written report by a certified soil tester evaluating and interpreting redoximorphic soil features, or other soil color patterns, may be submitted to the department in lieu of high groundwater determination data. The written report shall conclusively determine current conditions of periodic soil saturation and assess their effect upon the operation of a POWTS.
The department shall make a determination on the validity of the data, results and conclusions set forth in the report.
The written report shall include, but is not limited to, all of the following information:
An interpretive review of the site including, but not limited to, all of the following:
The landscape position and local topography in the area under investigation.
Soil series and mapping units, if available, for the immediate area, as listed in the USDA soil survey.
Data, if any, from previous soil saturation determinations in similar soil conditions and landscape position.
Any written reports, comments or recommendations by the governmental unit or department staff.
Actual elevations of soil saturation may be determined at specific sites in accordance with the soil saturation determination procedures in par. (c)
Precipitation data reported for soil saturation determination purposes shall include monthly totals for September through May, and daily totals for February through May.
Precipitation data totals under subd. 1.
shall be from either the closest local station to the site where the observation pipe is installed, or the average from the 3 closest local stations to the site. If averaging is used, the totals under subd. 1.
shall be submitted for all 3 stations.
Where sites are subject to a broad, relatively uniform, regional water table, the fluctuation observed over a several year cycle shall be considered.
At such sites, and where free water levels are more than 5 feet below grade, determinations shall be made using the hydrograph procedures contained in sub. (4)
Areas affected by a regional water table shall be delineated by the department in consultation with the affected counties and the Wisconsin Geological and Natural History Survey.
The department may prohibit soil saturation determinations in fine textured soil with high matric potentials where determination results may be inconclusive.
In such cases, the department may approve alternative methods to address the direct determination of saturated or near saturated soil conditions not enumerated in this section.
(f) Groundwater elevation observation pipe installation and construction. SPS 385.60(3)(f)1.a.a.
At least 3 groundwater elevation observation pipes shall be installed to delineate the area under investigation.
The governmental unit or department may require more than 3 observation pipes to adequately evaluate potential soil saturation conditions.
At the request of the department or governmental unit, at least one observation pipe shall be constructed to a depth of 15 feet below the ground surface to determine if high groundwater elevation conditions are due to a perched water table and the possible extent of the saturated zone.
Other observation pipes shall terminate at specific depths below grade that will serve to evaluate where shallow perched zones of soil saturation occur within the soil profile.
The governmental unit or department may designate specific observation pipe depths and locations based on soil and site conditions, or experience in a particular geographic area or topographic position.
3. Observation pipe construction.
The direct observation of soil saturation conditions shall be accomplished by means of observation pipes conforming to this subdivision and Figure 385.60-1.
The observation pipe shall be of a material meeting the standards in s. SPS 384.30
Table 384.30-1, except that lead pipe may not be used.
The inside diameter of an observation pipe may not be less than 2 inches or more than 4 inches nominal size.
The borehole diameter shall be 2 to 4 inches larger than the outside diameter of the observation pipe.
The top of the observation pipe shall terminate at least 18 inches above grade and be provided with a vented cap.
The bottom of the observation pipe shall terminate with a slotted, or screened pipe. The slots or screen shall extend 6 to 18 inches above the bottom of the pipe and be at least 4 inches below the filter pack seal. The slots or screen shall not be hand cut and shall be designed to retain soil particles with a diameter of greater than 0.02 inch.
Finished grade around the observation pipe shall be sloped away from the observation pipe using soil material.
At a minimum, the upper 12 inches of annular space surrounding the observation pipe shall be sealed by puddled clay, bentonite, or an equal-parts mixture of soil, bentonite and cement. A surface seal may not be necessary if the entire soil profile is sand.
The annular space seal below 12 inches and to the top of the filter pack seal may be of unspecified soil material.
A filter pack seal shall be installed above the filter pack to prevent soil migration downward into the filter pack.
The observation pipe shall be set on at least 2 inches of pea gravel that extends 4 to 6 inches above the top of the screen or highest slot. The gravel filter pack is not necessary if the natural soil is coarse sand or coarser.
SPS 385.60(3)(g)1.1. Observation period.
The observation period for soil saturation determinations shall begin on or before the appropriate date specified in Figure 385.60-2, and end June 1.
2. Alternate observation period.
The department may approve an alternate observation period if the data presented conclusively demonstrates equivalency to conditions encountered during a normal spring observation period.
3. Minimum frequency.
Observations shall be made on the first day of the observation period and at least every 7 days thereafter until the observation period is complete.
The highest level of soil saturation shall be considered the highest level of free water observed in an observation pipe on 2 occasions 7 days apart during the observation period.
The results of soil saturation determinations under this section shall be considered inconclusive if the precipitation totals under par. (c)
do not equal or exceed: