NR 204.07(3)(o)(o) Table B site restrictions apply to all sludges that are applied to land in bulk unless prior department approval has been received. The distances stated in Table B are minimums. Table C applies to all bulk sludge designated as Class B with respect to pathogens that is applied to land. The intervals of time listed in Table C refer to the time period between the sludge application and harvesting. The permittee or land applier shall supply the farmer with the information in Table C, in a timely manner, to ensure compliance with these requirements.

NR 204.07(4)(a)(a) In addition to other requirements in this chapter, there are 3 categories of requirements of sludge quality which must be satisfied before the sludge may be applied to land. The categories are listed in subs. (5), (6) and (7). They are metal concentrations, pathogen densities and treatment processes, and vector attraction reduction. Each category is divided into 2 levels which determine a higher or lower quality of sludge. They are: for metals—pollutant concentrations and ceiling concentrations, specified in sub. (5); for pathogens—class A and class B, specified in sub. (6); and for vector attraction reduction—treatment processes and physical barriers, specified in sub. (7). A sludge shall meet the minimum, or lower quality, requirements for each category in order to be land applied. When a sludge meets the higher quality level in all 3 categories, it is considered exceptional quality sludge. When a sludge meets the higher level in the metals category it is considered high quality and exempt from tracking cumulative metal loadings to the application sites.

NR 204.07(4)(b)(b) When a sludge is exceptional quality or when it is bagged and satisfies the requirements in sub. (5) (c) or (d), it may be used on lawns or home gardens. Sludge not meeting those requirements may not be used on lawns or home gardens.

NR 204.07(4)(c)(c) Sludge that will be sold or given away in a bag shall, at a minimum, satisfy the class A pathogen requirements in sub. (6) (a), one of the vector attraction reduction process requirements in sub. (7) (a) to (i) and either the high quality pollutant concentration limits in Table 3 or the ceiling concentration limits in Table 1. Bagged sludge that does not meet the high quality limits in Table 3 is subject to the requirements in sub. (5) (d).

NR 204.07(5)(a)(a) Table 1 lists the ceiling concentrations of metal pollutants for sludge that is land applied. Sludge may not be applied to land if the concentration of pollutants in the sludge exceeds any of the ceiling concentration limits established in Table 1. Options available if a ceiling concentration in sludge is exceeded include: retesting, mixing with another sludge or other material and demonstration of compliance with Table 1, landfilling or incinerating.

NR 204.07(5)(b)(b) Table 2 lists the cumulative metal pollutant loading limits for sites on which bulk sludge is applied. If bulk sludge is applied to land and the sludge does not meet the pollutant concentration limits in Table 3, then the limits in Table 2 shall apply to all land application sites. Bulk sludge that does not meet the Table 3 concentration limits may not be applied to sites where the cumulative pollutant loading limits in Table 2 have been reached. When bulk sludge that does not meet Table 3 limits is applied to land, the permittee shall monitor and retain cumulative pollutant loadings records to each site, and shall notify the department, in their annual report, when any site reaches 90% of the allowable cumulative loading for any metal established in Table 2.

NR 204.07(5)(c)(c) Sludge shall meet all the pollutant concentration limits established in Table 3, to be considered high quality. High quality sludge is exempt from the cumulative loading limits specified in par. (b).

NR 204.07(5)(d)1.1. Table 4 lists the maximum annual pollutant loading rates for sites where bagged sludge that is not high quality is land applied. If bagged sludge does not meet all of the pollutant concentrations in Table 3, the pollutant loading requirements in Table 4 apply to all land application sites utilized, including lawns and home gardens. To ensure that the annual pollutant loading rates in Table 4 are not exceeded, the amount of sludge applied annually shall be less than the annual sludge application rate calculated as follows:

NR 204.07(5)(d)2.2. When distributing bagged sludge that is subject to the Table 4 loading rates, the permittee shall provide an information sheet to each person receiving the bagged sludge or shall print instructions on the bag or container or label. The label instructions or information sheet shall contain the following information, at a minimum:

NR 204.07(6)(6) Pathogen densities and treatment processes. Sludge may not be land applied unless the Class A pathogen requirements in par. (a) or the Class B pathogen requirements in par. (b) are satisfied. These requirements are summarized in Tables 5 and 6. Bagged sludge and exceptional quality sludge shall satisfy the Class A requirements in par. (a).

NR 204.07(6)(a)(a) One of the requirements in each subds. 1. and 2. shall be met for sludge to be classified as Class A. Class A requirements shall be met prior to or at the time of meeting the vector attraction reduction requirements specified in sub. (7), unless the process used to meet the vector requirements is one of either sub. (7) (f), (g) or (h). Class A requirements are summarized in Table 5:

NR 204.07(6)(a)1.1. ‘Pathogen or indicator organism densities.’ The required fecal coliform density or salmonella density shall be satisfied immediately after the treatment process in subd. 2. is completed. If the material is bagged or distributed at that time, no re-testing is required. If the material is bagged, distributed or land applied at a later time, the sludge shall be retested and the requirements of subd. 1. a. or b. satisfied at that time also, to ensure that regrowth of the organisms has not occurred.