NR 110.14(12)(b)5.5. The lift station electrical system may be connected to 2 independent electrical transmission routes which receive power from the same electrical grid network which supplies power to the lift station service area.
NR 110.14(12)(b)6.6. The lift station may be equipped with a holding facility which has a capacity to hold the average design flow for a minimum period of 24 hours.
NR 110.14(12)(c)(c) Grinder pump and effluent pump lift stations.
NR 110.14(12)(c)1.1. Emergency operation of duplex grinder pump and effluent pump lift stations which serve more than 3 residential units shall be provided by one of the methods described in par. (b).
NR 110.14(12)(c)2.2. Emergency operation provisions for duplex grinder pump and effluent pump lift stations may be waived for those stations which serve homes with private water supply systems provided it is demonstrated to the department that the lift station wet well has the capacity to hold the residual water volume of the private water system.
NR 110.14 HistoryHistory: Cr. Register, November, 1974, No. 227, eff. 12-1-74; r. and recr. Register, February, 1983, No. 326, eff. 3-1-83; correction in (2) (a) 3. made under s. 13.93 (2m) (b) 7., Stats., Register, September, 1995, No. 477; correction in (2) (a) 3. was made under s. 13.93 (2m) (b) 7., Stats., Register, May, 2001, No. 545; CR 09-123: am. (1) (b) and (2) (b) 3., r. and recr. (2) (a) 3. and (3) to (5), renum. (6) and (7) to be (9) and (12) and am., cr. (6) to (8), (10) and (11) Register July 2010 No. 655, eff. 8-1-10.
NR 110.15NR 110.15General requirements for sewage treatment facilities.
NR 110.15(1)(1)Design report. A design report shall be submitted with plans and specifications for all sewage treatment facilities. This report shall summarize the design hydraulic loading, design biochemical oxygen demand (BOD), suspended solids and other appropriate pollutant loading, the sizing of treatment units, pump capacities, design calculations for major treatment units, and explain any deviations from the preliminary facilities planning design information which is required by s. NR 110.09 (1) (b).
NR 110.15(2)(2)Effluent quality.
NR 110.15(2)(a)(a) Design. Sewage treatment facilities shall be designed to achieve compliance with the monthly and weekly average effluent limitations for biochemical oxygen demand (BOD) and total suspended solids contained in ch. NR 210, or other WPDES permit requirements, as appropriate, or with any more stringent water quality related effluent limitations required to achieve appropriate water quality standards derived from chs. NR 102 to 106, or from any federally promulgated water quality standard for any waters of the state.
NR 110.15(2)(b)(b) Treatment during construction. During construction of new facilities, treatment shall be maintained at a level not less than that which existed prior to the start of construction.
NR 110.15(3)(3)Plant location.
NR 110.15(3)(a)(a) Flood protection.
NR 110.15(3)(a)1.1. All sewage treatment facilities shall be located such that they are not subject to flooding.
NR 110.15(3)(a)2.2. Any sewage treatment facility located in a floodplain, or suspected to be in a floodplain, will not be approved until the flood analysis requirements of s. NR 110.09 (2) (n) are met.
NR 110.15(3)(a)3.3. A sewage treatment facility may be located in the flood fringe providing the requirements of par. (c) and ss. NR 116.14, 116.15, 116.16 and 116.17 are met.
NR 110.15(3)(a)4.4. All sewage treatment facilities which are located in a floodplain shall be floodproofed to an elevation of at least 2 feet above the regional flood elevation.
NR 110.15(3)(a)5.5. Location of a land disposal system in a floodplain will be evaluated on a case-by-case basis.
NR 110.15(3)(b)(b) Floodway construction.
NR 110.15(3)(b)1.1. No new sewage treatment facility shall be located in a floodway as defined in ss. NR 116.03 and 116.11. A change in the zoning classification of a treatment facility site from floodway to flood fringe in accordance with the procedures specified in s. NR 116.21 (6), will be acceptable only if the rezoning is complemented by the construction of a dry land access as defined in par. (c). When the facility site is rezoned from floodway to flood fringe, the dry land access requirement will not be waived.
NR 110.15(3)(b)2.2. Any existing sewage treatment facility which is located in a floodway shall meet the requirements of subd. 1. if the expansion or upgrading of the facility is greater than 50% of the value of the facility. Value is defined in par. (c).
NR 110.15(3)(b)3.3. Any existing sewage treatment facility which is located in a floodway will not have to comply with the requirements of subd. 1. if the expansion or upgrading of the facility is less than 50% of the value of the facility. In this instance, the dry land access requirements of par. (c) will not apply.
NR 110.15(3)(c)(c) Accessibility.
NR 110.15(3)(c)1.1. Sewage treatment facilities shall be accessible at all times. Sewage treatment facilities located in a flood fringe shall be accessible by dry land access. Dry land access is defined as a service road which has a minimum elevation of at least one foot above the regional flood elevation.
NR 110.15(3)(c)2.2. The dry land access requirement may be waived by the department if one of the following criteria is met:
NR 110.15(3)(c)2.a.a. The physical characteristics of the treatment site and the surrounding area pose practical difficulties for construction of dry land access, and the isolation of the sewage treatment facility during the regional flood is less than 24 hours for mechanical treatment facilities, or 5 days for lagoon systems. The duration of the regional flood shall be calculated using the methods described in s. NR 116.07; or
NR 110.15(3)(c)2.b.b. The physical characteristics of the treatment site and the surrounding area pose practical difficulties for construction of dry land access, and the treatment facility access is inundated by less than one foot of water during the regional flood. In these instances, the access roads shall be stabilized and delineated; or
NR 110.15(3)(c)2.c.c. The construction costs of the expansion or upgrading of an existing treatment facility are less than 50% of the value of the existing facility. The value of the existing facility shall be calculated by subtracting the 20-year total present worth of expanding or upgrading the existing facility from the 20-year total present worth of the most cost-effective treatment alternative located at another site which is not in a floodplain.
NR 110.15(3)(d)(d) Isolation.