NR 113.08(1)(b)(b) Morphological soil evaluations shall be conducted by a soil scientist under s. NR 113.03 (64m), subject to all of the following requirements:

NR 113.08(1)(b)2.2. The evaluation shall include soil conditions and properties, permeability, available water capacity, depth of zones of soil saturation, depth to bedrock, slope, topography, setback requirements, and the potential for flooding.

NR 113.08(1)(b)3.3. Evaluation data shall be reported on forms acceptable to the department and signed by the soil scientist. Reports shall be filed with the department for all sites investigated within 30 days of evaluation completion. No evaluation data may be omitted from reporting.

NR 113.08(2)(2) Soil borings; high and low use fields. Soil borings are required for all high use fields. Low use fields are not required to have soil borings as long as reliable detailed soil conservation or survey maps are available except as follows:

NR 113.08(2)(b)(b) For all low use fields that have a high degree of variability or where a detailed soil conservation or survey maps are known to be unreliable, the department or a delegated county may require soil borings.

NR 113.08(2)(c)(c) Additional soil borings may be required by the department when limited soil information exists or when soil information is determined to be insufficient.

NR 113.08(3)(3) Soil saturation determinations. Soil saturation determinations shall be conducted and reported by a soil scientist unless approved by the department.

NR 113.08 HistoryHistory: Cr. Register, September, 1996, No. 489, eff. 1-1-97; CR 20-046: am. (title), renum. (1) to (1) (a), (b) and am., am. (2) (a), cr. (2) (c), (3) Register September 2021 No. 789, eff. 10-1-21; correction in (1) (b) (intro.) made under s. 35.17, Stats., and correction in (2) (title) made under s. 13.92 (4) (b) 2. Register September 2021 No. 789.

NR 113.09(1)(1) General.

NR 113.09(1)(b)(b) Septage may only be applied to agricultural lands and may not be applied at rates that will supply available nitrogen at amounts greater than the agronomic need for the crop grown as calculated under sub. (4).

NR 113.09(1)(c)(c) Yearly loading rates listed in Table 4 may be used if the crop grown on a low use field requires 100 lbs-N/ac or more. If the crop requires less than 100 lbs-N/ac, the loadings shall be reduced in accordance with the equation under sub. (4).

NR 113.09(2)(2) High use fields. The volume of septage applied annually on a high use field may not exceed the amount calculated under sub. (4) that is necessary to supply the nitrogen needs of the crop to be grown, as determined by the analysis of soil samples. The nitrogen crop needs shall be based on the University of Wisconsin - Extension bulletin A-2809 nutrient application guidelines for field, vegetable and fruit crops in Wisconsin, dated November 2012, which is incorporated by reference and soil samples shall be collected based on the University of Wisconsin extension bulletin A-2100, sampling soils for testing, dated January 2013, which is incorporated by reference or guidance approved by the department, except as allowed under sub. (3).

NR 113.09 NoteNote: Copies of Bulletin A-2100, dated January 2013, and Bulletin A-2809, dated November 2012, are available for inspection in the offices of the department of natural resources and the legislative reference bureau.

NR 113.09(3)(3) Specific crops on high use fields. Septage may be applied to most leguminous crops at a volume sufficient to supply 200 lbs/ac of available nitrogen. If septage is applied to soybeans, the loading shall be limited to 140 lbs/ac of available nitrogen.

NR 113.09(4)(4) Annual agronomic rate. For the purpose of implementing this section, septage may not be applied at a rate that exceeds the following:

NR 113.09 NoteNote: The landowner or farmer may be subject to compliance with s. ATCP 50.04 (3) and s. NR 151.07. Any application of nutrients shall be consistent with nutrient management plans under these state requirements and with any local requirements.

NR 113.09(5)(5) Maximum weekly loading of non-grease interceptor waste.

NR 113.09(5)(a)(a) Weekly hydraulic rates. The maximum weekly hydraulic loading rate of septage application shall be limited by soil characteristics, and application method. The maximum weekly hydraulic loading rate is limited to 13,000 gallons per acre per week except that injection and incorporation on sites of 6 percent slope or less may be increased as follows:

NR 113.09(5)(a)1.1. For sites with predominately sandy loam, loam and silt loam, the weekly application rate may be increased with department approval to 27,000 gallons per acre per week.

NR 113.09(5)(a)2.2. For sites with predominately clay loam, the weekly application rate may be increased with department approval to 20,000 gallons per acre per week.