A minimum separation distance of 1.25 meters (4 feet) shall be maintained between the bottom of storage lagoons and the highest recorded or indicated seasonal groundwater table elevation.
A minimum separation distance of 3 meters (10 feet) shall be maintained between the bottom of storage lagoons and bedrock.
Lagoon sludge storage facilities shall be designed to facilitate easy addition and removal of sludge without causing damage to the facility.
The maximum lagoon depth shall be 6 meters (20 feet). The depth may be increased by the department on a case-by-case basis.
Storage tanks shall be designed, installed and maintained to prevent leaks due to corrosion or structural failure.
Liquid sludge storage facilities shall be designed with mixing capabilities to completely mix the tank contents.
Supernatant withdrawal capability is recommended if the solids content of the sludge is less than 5%.
Sampling ports shall be provided on both the influent and effluent lines to the tank. It is recommended that sample ports be equipped with drainage capabilities or other provisions to allow for a means to sample the tank effluent without actual discharge.
Permanent and temporary cake storage facilities shall be designed to minimize odors and to protect surface waters, groundwaters and soil.
Cake storage facilities designed as pits shall provide a method of draining-off and collecting precipitation.
All sludge stored at an intermediate term cake storage facility shall be covered with a temporary cover. At a minimum, the cover shall be a 4 mil polyethylene cover or equivalent. The cover shall be anchored or otherwise secured.
All sludge stored at a long term cake storage facility shall be covered with a permanent cover.
(f) Monitoring wells.
Monitoring wells may be required on a case-by-case basis. Construction of monitoring wells shall comply with the requirements of s. NR 110.25 (5)
and ch. NR 141
(g) Amount of storage.
Appropriate sludge storage and length of storage shall be provided in accordance with ch. NR 204
and this chapter. The required storage capacity may not include storage in clarifiers, oxidation ditches or aeration basins. However, digestive capacity that is greater than the digestive requirements can be considered as storage and can be used in calculating the amount of available storage.
Liquid sludge shall be transported in an enclosed watertight unit from treatment plant to disposal site.
All sludge field spreading equipment shall be provided with a control so that the discharge valve can be opened and closed by the driver while the vehicle is in motion.
(b) Semi-solid cake.
Sludge cake shall be transported in a covered watertight unit to prevent leakage of sludge moisture released in transit. Provision shall be taken to prevent the spilling of sludge from the vehicle while in transit and to prevent an odor nuisance while in transit.
(12) Ultimate disposal.
The final use or disposal of sludge shall be regulated through the WPDES permit, this chapter and ch. NR 204
which comply with all applicable provisions of the clean water act (CWA) section 405 and 40 CFR 503
NR 110.26 History
Cr. Register, November, 1974, No. 227
, eff. 12-1-74; r. and recr. Register, February, 1983, No. 326
, eff. 3-1-83, am. (9), (12) (a) 3. and (c), r. and recr. (10) and cr. (12) (d), Register, November, 1990, No. 419
, eff. 12-1-90; correction in (7) (b) made under s. 13.93 (2m) (b) 7., Stats., Register, September, 1995, No. 477
; am. (2) (e) 1., (7) (b), (9) (a), (10) (a), (c) 1., 2. and (11) (a) 2., r. (10) (c) 4., 5., (f) 2. and 3., renum. (10) (d) to (f) 1. to be (10) (e) to (g) and am. (e) 6., (g) (intro.) and 1., cr. (10) (d), r. and recr. (12), Register, December, 1995, No. 480
, eff. 1-1-96; correction in (5) (d) 4. was made under s. 13.93 (2m) (b) 7., Stats., Register, May, 2001, No. 545
; corrections in (5) (d) 4., (7) (b) and (9) (a) made under s. 13.92 (4) (b) 7., Stats., Register February 2010 No. 650
; corrections in (5) (b) 1. d. and (8) (b) 1. made under s. 13.92 (4) (b) 1. and 7., Stats., Register July 2010 No. 655
; correction in (5) (d) 4. made under s. 13.92 (4) (b) 7., Stats., Register January 2012 No. 673
Requirements for certified or registered laboratory.
Bacteriological analyses of groundwater samples, and all radiological analyses, shall be performed by the state laboratory of hygiene or a laboratory certified or approved by the department of health and social services. Other laboratory test results for those pollutants which are required by the WPDES permit to be monitored and which are submitted to the department in support of facility plans or plans and specifications under this chapter shall be performed by a laboratory certified or registered under ch. NR 149
. The department may require, on a case-by-case basis, that certain other laboratory test results submitted to the department be performed by a certified or registered laboratory. The following tests are excluded from this requirement:
NR 110.27 Note
Note: The requirement in this section to submit data from a certified or registered laboratory is effective on August 28, 1986.
NR 110.27 History
Cr. Register, April, 1986, No. 364
, eff. 8-28-86.