Section 213.08. General design requirements.

 

(1)   Location.

(a) Lagoons, storage structures and treatment structures may not be located closer than:

1. 1,000 feet from a well serving a community public water supply system.

2. 250 feet from other potable water supply wells.

3. 500 feet from an inhabited dwelling except that this distance may be reduced with written permission from the owner and occupants of the residence. The department may require a greater distance depending on the type of lagoon, storage structure or treatment structure and potential for aesthetic impacts and public health impacts.

(b) Lagoons, storage structures and treatment structures may not be located in the floodway and shall conform with the requirements of ch. NR 116 .

(c) Lagoons, storage structures and treatment structures may not be located within wetlands.

(d) Lagoons, storage structures and treatment structures shall be designed and operated to minimize the level of substances in the groundwater and to prevent exceedance of the groundwater preventive action limits (PAL) to the extent technically and economically feasible. Groundwater preventive action limits are listed in ss. NR 140.10 and 140.12 .

(2)   Basic construction design.

(a) Effective erosion protection of exterior slopes of lagoons shall be provided by appropriate means, such as riprap or seeding with grass.

(b) Lagoons shall be maintained as necessary to prevent scouring of the liner and liner cover, discourage vegetative growth, and avoid desiccation and cracking of the liner.

(c) A minimum separation of 5 feet shall be maintained between the bottom of the lagoon liner or subbase of a storage structure and either bedrock or the groundwater level, whichever is higher.

(3)   Groundwater monitoring.

(a) A groundwater monitoring system designed and constructed in accordance with ch. NR 141 may be required by the department to provide information on the long term effects of a lagoon, storage structure or treatment structure on groundwater.

(b) When a groundwater monitoring system is required, the parameters to be monitored and the monitoring frequency will be established on a case-by-case basis.

(4)   Additional design requirements. In cases where critical groundwater, geologic or construction conditions warrant, the department may require construction specifications or testing requirements more stringent than those described in this chapter if necessary to preclude detrimental effects to the groundwater.

History: Cr. Register, July, 1984, No. 343 , eff. 8-1-84; renum. from NR 213.05 and am. Register, June, 1990, No. 414 , eff. 7-1-90.