- See PDF for table

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(5)(d)2.a. a. The name and address of the permittee who generated the sludge.

NR 204.07(5)(d)2.b. b. A statement that prohibits the use of the sludge except in accordance with the instructions on the label or information sheet.

NR 204.07(5)(d)2.c. c. An annual sludge application rate as calculated in this subsection that will ensure that the annual pollutant loading rate limits, established in Table 4, are not exceeded.

NR 204.07(5)(d)2.d. d. The percentage content of nitrogen, phosphorus and potassium present in the sludge.

- See PDF for table

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:

- See PDF for table

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.

NR 204.07(6)(a)1.a. a. The sludge shall have a fecal coliform density equal to or less than 1,000 most probable number (MPN) per gram of total solids on a dry weight basis. Compliance with this requirement shall be demonstrated by calculating the geometric mean of at least 7 separate samples; or

NR 204.07(6)(a)1.b. b. The sludge shall have a salmonella density equal to or less than 3 MPN per 4 grams of total solids on a dry weight basis; and

NR 204.07(6)(a)2. 2. ‘Pathogen treatment processes.’

NR 204.07(6)(a)2.a. a. Satisfy the requirements as specified in 40 CFR 503.32 (a). 40 CFR 503.32 (a) as stated on January 1, 1996 is incorporated by reference; or

NR 204.07 Note Note: Copies of this section are available for inspection in the offices of the department of natural resources, secretary of state, and the legislative reference bureau, Madison, Wisconsin, or may be purchased from the superintendent of documents, U.S. government printing office, Washington DC 20402.

NR 204.07(6)(a)2.b. b. Compost the sludge using either within-vessel or static aerated pile composting methods and maintain the temperature of the sludge at 55° C or higher for 3 days, or compost the sludge using windrow composting methods and maintain the temperature of the sewage sludge at 55° C or higher for 15 days or longer. During this period, a minimum of 5 windrow turnings are required; or

NR 204.07(6)(a)2.c. c. Dry the sludge by direct or indirect contact with hot gases to reduce the moisture content of the sludge to 10% or lower. Either the temperature of the sewage sludge particles shall exceed 80° C or the wet bulb temperature of the gas in contact with the sludge as the sludge leaves the dryer shall exceed 80° C; or

NR 204.07(6)(a)2.d. d. Heat liquid sludge to a temperature of 180° C or higher for 30 minutes; or

NR 204.07(6)(a)2.e. e. Agitate liquid sludge with air or oxygen to maintain aerobic conditions. The mean cell residence time for the sludge shall be 10 days at 55° to 60° Celsius; or

NR 204.07(6)(a)2.f. f. Irradiate the sludge with beta rays from an accelerator at dosages of at least 1.0 megarad at room temperature; or

NR 204.07(6)(a)2.g. g. Sludge is irradiated with gamma rays from certain isotopes, such as Cobalt 60 and Cesium 137, at dosages of at least 1.0 megarad at room temperature; or

NR 204.07(6)(a)2.h. h. Maintain the temperature of the sludge at 70° Celsius or higher for 30 minutes or longer; or

NR 204.07(6)(a)2.i. i. Treat the sludge in a process that is equivalent to a process to further reduce pathogens, as approved by the department.

NR 204.07(6)(b) (b) Either subd. 1. or one of the requirements in subd. 2. shall be met for the sludge to be classified as Class B. The Class B requirements are summarized in Table 6:

- See PDF for table

NR 204.07(6)(b)1. 1. ‘Fecal coliform density.’ The sludge shall have a fecal coliform density of less than or equal to 2,000,000 most probable number (MPN) or colony forming units (CFU) per gram of total solids on a dry weight basis. Compliance with this requirement shall be demonstrated by calculating the geometric mean of at least 7 separate samples; or

NR 204.07(6)(b)2. 2. ‘Pathogen treatment processes.’

NR 204.07(6)(b)2.a. a. Agitate the sludge with air or oxygen to maintain aerobic conditions for a mean cell residence time and temperature between 40 days at 20° C and 60 days at 15° C; or