2019.02.04 CC Packet - Laserfiche WebLink

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Effective April 28, 2015 Chapter Four Subsurface Sewage Treatment System Regulations (11) Water Level Above Top. Whenever the water level has risen above the top of a sewage tank, the tank must be pumped to remove all solids and liquids after the flood has receded and before use of the system is resumed. 18.3 Privies (1) Privies Allowed. Privies shall only be considered when there is no water supplied to the dwelling. (2) Pit Privies and Vault Privies. Pit privies shall not be installed where the bottom of the pit is less than three feet above the saturated soil or bedrock. A vault privy shall be used in areas not meeting the three foot separation. The vault of a vault privy shall be constructed in the same manner as a sewage tank in accordance with Section 13. (3) Setbacks. Privies shall be set back from surface waters, buildings, property lines, and water supply wells as prescribed in Table V. (4) Privy Sizing. Pits or vaults shall be of sufficient capacity for the dwelling they serve, but shall have at least 50 cubic feet of capacity. The sides of the pit shall be curbed to prevent cave-in. The privy shall be constructed so as to be easily maintained and it shall be insect proof. The door and seat shall be self -closing. All exterior openings, including vent openings, shall be screened. (5) Vented. Privies shall be adequately vented. (6) Maintenance. When the privy is filled to within one foot of the top of the pit, the solids shall be removed. (7) Abandonment. Abandoned pits shall have the solids removed and be filled with clean earth and slightly mounded to allow for settling. Removed solids shall be disposed of in accordance with Section 22. 18.4 Holding Tanks (1) Holding Tanks Residential Use. Holding tanks may be installed on previously developed sites, for use on a temporary basis for periods of up to 12 months, during which time measures are taken to provide municipal sewer service or the installation of an approved system as provided in this Chapter. Holding tanks may also be considered on a permanent basis on previously developed seasonal sites where occupancy is no more than 180 days per year, water use is no more than 75 gallons per day and a development agreement has been submitted and approved by the Department. Development Agreement shall be recorded against the property in the office of Property Records and Taxpayer Services. (2) Holding Tanks Non -Residential Use. Holding tanks may be considered on a permanent basis for non-residential, low water use establishments with a sewage flow of 150 gallons per day or less, subject to approval by the Department. Holding Tanks Required. Holding tanks must be used for floor drains for vehicle parking areas and existing facilities potentially generating hazardous waste. (3) Holding Tank RequirementsTo qualify as a holding tank, the system must: (A) Meet or exceed the requirements of Section 13.2 or 13.3 (B) Meet or exceed the requirements of Section 16.2(6). (C) Meet or exceed the requirements of Section 16.3 (2). (4) Watertightness All tanks used as holding tanks must be tested once placed at the final location for watertightness as specified in Minnesota Rules, Chapter 7080.2010. (5) Holding Tank Access. A cleanout pipe of at least six inches in diameter must extend to the ground surface and be provided with seals to prevent odor emissions and exclude insects and vermin. A maintenance hole of at least 20 inches in least dimension must extend through the cover to a point within 12 inches, but no closer than six inches, below finished grade. If the maintenance hole is covered with less than six inches of soil, the cover must be secured according the Section 13.18. (6) Holding Tank Sizing. For a dwelling, the minimum size is 1,000 gallons or 400 gallons times the number of bedrooms, whichever is greater. For other establishments, the minimum capacity shall be at least five times the design flow. Tank sizing for floodplain areas must be calculated according to Section 18.2 (9). 74 Washington County Development Code