NR 110.09(2)(j)2.2. ‘Wastewater flow estimates.’ In determining total average flow for the design of sewerage systems, the flows to be considered include the average daily base flows (ADBF) expected from each of the following: residential sources, commercial sources, institutional sources, and industries the system will serve plus allowances for future industries and nonexcessive infiltration or inflow.

NR 110.09(2)(j)2m.a.a. Existing ADBF shall be estimated based upon a fully documented analysis of water use records adjusted for consumption and losses or on records of wastewater flows for extended dry periods less estimated dry weather infiltration. Future flows for the sewerage system design shall be estimated by determining the existing per capita flows, subtracting any projected per capita water conservation flow reduction and multiplying this figure by the future projected population to be served. Seasonal population can be converted to equivalent full-time residents using the following multipliers:

NR 110.09(2)(j)2m.b.b. Where water supply and wastewater flow data are lacking, existing and future ADBF shall be estimated by multiplying a gallon per capita per day (gpcd) allowance not exceeding those in the following table by the estimated total of the existing and future resident populations to be served. The tabulated ADBF allowances include estimates for commercial and institutional sources as well as residential sources. The department may approve exceptions to the tabulated allowances where large commercial and institutional flows (more than 25% of total estimated ADBF) are documented.

NR 110.09(2)(j)3.a.a. The sewerage system total design flow capacity may include allowances for industrial flows. The allowances may include capacity needed for industrial flows which the existing sewerage system presently serves. However, these flows shall be carefully reviewed and means of reducing them shall be considered. Capacity needs for existing flows from industrial users and for future flows from all industries intending to increase their flows or relocate in the area must be documented.

NR 110.09(2)(j)3.b.b. While many uncertainties accompany forecasting future industrial flows, there is still a need to allow for some unforeseeable future industrial growth. Thus, design capacity of the treatment works may include (in addition to the existing industrial flows and future documented industrial flows) a nominal flow allowance for future nonidentifiable industries or for unplanned industrial expansions, provided that areawide waste treatment management plans, land-use plans and zoning provide for the industrial growth. This additional allowance for future unplanned industrial flow may not normally exceed 5%, or 10% for towns with less than 10,000 population, of the total average design flow of the treatment works exclusive of the allowance or 25% of the total industrial flow, existing plus documented future, whichever is greater.

NR 110.09(2)(j)4.4. ‘Staging of sewage treatment facilities.’ For municipally owned projects the design capacity of new, upgraded or expanded sewage treatment facilities shall not exceed that necessary for wastewater flows projected during the initial staging period. Privately owned domestic waste treatment facilities shall provide design capacity for estimated flows 20 years from the estimated time of start-up of the facilities unless the cost-effectiveness staging analysis is done to justify a lesser design staging period. The staging period for municipally owned waste treatment facilities shall be determined by either of the following methods:

NR 110.09(2)(j)4.c.c. A municipality may stage the construction of a treatment plant for a shorter period than the maximum allowed under this subdivision. A shorter staging period might be based upon environmental factors (secondary impacts, compliance with other environmental laws, energy conservation, water supply), an objective concerning planned modular construction, the utilization of temporary treatment plants, or attainment of consistency with locally adopted plans including comprehensive and capital improvement plans. However, the staging period may in no case be less than 10 years, because of associated cost penalties and the time necessary to plan and construct later stages.

NR 110.09(2)(k)(k) An evaluation of the costs, cost-savings, and effects of flow reduction measures unless the existing average daily base flow from the area is less than 70 gpcd, or the current population of the municipality is under 5,000, or the area is exempted by the department for having an effective existing flow reduction program. A flow reduction program shall be adopted by municipalities which shall include those measures determined to be cost effective.

NR 110.09(2)(L)(L) An analysis of innovative and alternative treatment processes and techniques that reclaim and reuse water, productively recycle wastewater constituents, eliminate the discharge of pollutants or recover energy. Where certain categories of alternative technologies may not be generally applicable because of prevailing climatic or geological conditions, a detailed analysis of these categories of alternative technologies is not required. However, the reason for such a rejection must be fully substantiated in the facilities plan.

NR 110.09(2)(m)(m) An analysis of the primary energy requirements (operational energy inputs) for each system considered. The alternative selected shall propose adoption of measures to reduce energy consumption or to increase recovery as long as such measures are cost effective.

NR 110.09(2)(n)(n) A flood analysis for the selected treatment facility site if the site is in, or suspected to be in, a floodplain. The analysis shall meet the requirements of s. NR 116.07. The analysis shall determine the limits of the floodplain and the floodway, the regional flood elevation, and the effects on floodstage of constructing the sewage treatment facility, including dry land access and flood protection. The flood velocities at the sewage treatment facility site, and the duration of the regional flood shall also be determined. If a dry land access waiver is requested in accordance with s. NR 110.15 (3) (c), the flood analysis shall also include the information necessary to support the request.

NR 110.09(2)(o)(o) An assessment of the location of the sewage treatment facilities relative to commercial establishments and to buildings which are occupied or intended for residential use, and from land which is being actively developed for commercial or residential use. The location of sewage treatment facilities shall comply with the provisions of s. NR 110.15 (3) (d).

NR 110.09(2)(p)(p) An assessment of the location of land disposal systems relative to public water supply wells. The location and horizontal separation from the proposed land disposal site and any public water supply well shall be shown. The assessment shall discuss the hydrogeologic conditions of the area, the direction of groundwater movement, the depth of the public well casing, and any other appropriate information. The department will determine whether the separation distance between the land disposal system and the public well is sufficient to protect the public health and quality of the public water supply.

NR 110.09(2)(q)(q) Soil boring logs if the selected treatment alternative includes lagoons or land disposal of effluent. The borings shall supply accurate information about the soil conditions, and groundwater and bedrock elevations at the proposed treatment facility site.

NR 110.09(2)(r)(r) Any facility plan which recommends the abandonment of a wastewater treatment, sludge or septage storage lagoon, or land disposal system shall include an abandonment plan. An abandonment plan outlining the proposed method of abandonment of the facility shall be submitted as part of the facility plan to the department for approval. This abandonment plan shall provide for the removal and proper recycling, treatment or disposal of any accumulated solid matter, solid or liquid wastes or wastes in combination with soil. All recycling, treatment and disposal shall be conducted so as to protect public health and the environment. Unless otherwise directed by the department, all abandonment plans for wastewater treatment, sludge or septage storage lagoons, or high rate land disposal systems shall comply with ch. NR 720 for soils that have been contaminated by the contents of the lagoon or system. The abandonment plan shall address relandscaping necessary to prevent accumulation of standing water or runoff and shall provide for completion of the relandscaping within 2 years of the date on which the structure was last used as it was originally intended. The department shall require groundwater monitoring for a minimum of one year at a quarterly frequency after the abandonment of facilities which have an existing groundwater monitoring system. Groundwater monitoring may be required on a case-by-case basis for facilities which do not have existing groundwater monitoring systems. The monitoring data shall be reviewed after 1 year and the department shall determine whether groundwater monitoring should be continued or not. Any groundwater monitoring wells which are no longer necessary shall be abandoned in accordance with ch. NR 141 and documentation of well abandonment shall be provided to the department.

NR 110.09(3)(a)(a) Description of the existing environment without the project. This shall include for the delineated planning area a description of the present environmental conditions relevant to the analysis of alternatives or determinations of the environmental impacts of the proposed action. This description shall include, but not be limited to, discussions of the following topics where applicable to a particular study: surface and ground water quality; water supply and use; general hydrology; air quality; noise levels; energy production and consumption; land use trends; population projections, wetlands, floodplains, coastal zones and other environmentally sensitive areas; historic and archaeological sites; other related federal or state projects in the area; and plant and animal communities which may be affected, especially those containing threatened or endangered species.

NR 110.09(3)(b)(b) Description of the future environment without the project. The future environmental conditions with the no project alternative shall be forecast, covering the same areas listed in par. (a).

NR 110.09(3)(c)(c) Evaluation of alternatives. This discussion shall include a comparative analysis of feasible options and a systematic development of wastewater treatment alternatives. The alternatives shall be screened with respect to capital and operating costs; significant primary and secondary environmental effects; physical, legal or institutional constraints; and whether or not they meet regulatory requirements. Special and induced impacts such as development. The reasons for rejecting any alternatives shall be presented in addition to any significant environmental benefits precluded by rejection of an alternative. The analysis should consider, when relevant to the project: