(A) Water supply and sewage treatment.
(1) Regulation required. In order to ensure safe and healthful conditions, to prevent pollution and contamination of surface and ground water and to guide development compatible with the natural characteristics of shorelands and related water resources, individual private water supply and private waste treatment systems and all waste disposal systems and sites shall be regulated by the provisions of this section and applicable state and federal regulations.
(2) Permit required. No person, firm, or corporation shall install, alter, repair or extend any private well or sewage treatment system without first obtaining a permit from the city Zoning Administrator for the specific installation, alteration, repair or extension.
(3) Water supply. Any public or private supply of water for domestic purposes must meet or exceed standards for water quality of the Minnesota Department of Health, the Minnesota Pollution Control Agency, and the city’s Public Works Design Manual.
(4) Sewage treatment. Any premises used for human occupancy must be provided with an adequate method of sewage treatment, as follows:
(a) The city sewer system must be used where available.
(b) All private sewage treatment systems must meet or exceed the latest Minnesota Pollution Control Agency’s standards for individual sewage treatment systems. Individual Subsurface Sewage Treatment Systems, Minn. Rules Chapter 7080, is hereby adopted by reference and declared to be included in this part.
(c) On-site sewage treatment systems must be set back from the OHW of any riparian waterbody in accordance with § 151.03.22.
(d) Suitability:
1. All proposed sites for individual sewage treatment systems shall be evaluated in accordance with the evaluation criteria listed below.
2. If the determination of a site’s suitability cannot be made with the publicly available existing information, it shall then be the responsibility of the applicant to provide sufficient soil borings and percolation tests from on-site field investigations.
a. Depth to the highest known or calculated ground water table or bedrock;
b. Soil conditions, properties and permeability;
c. Slope; and
d. Existence of lowlands, local surface depressions, and rock outcrops.
(5) Nonconforming sanitary systems. All nonconforming water supply, sewage disposal, and waste disposal facilities and systems shall be brought into conformance with the provisions of this section as a condition of receiving any permit, variance, or approval required by state law or local ordinance.
(B) Stormwater management. Stormwater management, as regulated by Division 152.04, must be considered with all reviews, approvals, and permit issuances tendered under this part.
(1) The following are general standards:
(a) When possible, existing natural drainage ways, wetlands and vegetated soil surfaces must be used to convey, store, filter, and retain stormwater runoff before discharge to public waters.
(b) Development must be planned and conducted in a manner that will minimize the extent of disturbed areas, runoff velocities erosion potential and reduce and delay runoff volumes. Disturbed areas must be stabilized and protected as soon as possible and facilities or methods used to retain sediment on the site.
(c) When development density, topographic features and soil and vegetation conditions are not sufficient to adequately handle stormwater runoff using natural features and vegetation, various types of constructed facilities such as diversions, settling basins, skimming devices, dikes, waterways, and ponds may be used. Preference must be given to designs using surface drainage, vegetation, and infiltration rather than buried pipes and manmade materials and facilities.
(2) The following are specific standards:
(a) When constructed facilities are used for stormwater management, they must be designed and installed consistent with the field office technical guide of the local soil and water conservation districts.
(b) New construction of stormwater outfalls to public waters must provide for filtering or settling of suspended solids and skimming of surface debris before discharge.
(Ord. 20220120-01, passed 1-20-22)