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10 Section 18. Standards Adopted by Reference. The City hereby adopts by reference Minnesota Rules, Chapters 7080, 7081, 7082 and 7083 in their entirety as now constituted and from time to time amended. This adoption does not supersede the City’s right or ability to adopt local standards that are in compliance with Minnesota Statute 115.55. Section 19. Amendments to the Adopted Standards. 1. Determination of Hydraulic Loading Rate and SSTS Sizing. Table IX from Minnesota Rules, Chapter 7080.2150, Subd. 3E entitled “Loading Rates for Determining Bottom Absorption Area for Trenches and Seepage Beds for Effluent Treatment Level C and Absorption Ratios for Determining Mound Absorption Areas Using Detail Soil Descriptions” and Table IXa from Minnesota Rules, Chapter 7080.2150 are herein adopted by reference shall be used to determine the hydraulic loading rate and infiltration area for all SSTS permitted under this Ordinance. 2. Compliance Criteria for Existing SSTS. SSTS built after March 31, 1996, or existing SSTS located in a Shoreland area, existing Wellhead Protection area, or serving food, beverage, or lodging establishment as defined under Minnesota Rules, Chapter 7080.1100, Subd. 84 shall have a three (3’) foot vertical separation between the bottom soil infiltrative surface and the periodically saturated soil and/or bedrock. Existing systems that have no more than a fifteen (15%) percent reduction in this separation distance (a separation distance no less than 30.6 inches) to account for settling of sand or soil, normal variation of separation distance measurements and interpretation of limiting layer characteristics may be considered compliant under this Ordinance. The vertical separation measurement shall be made outside the area of system influence but in an area of similar soil. Minnesota Rules, Chapter 7080.1500, Subd. 4. 3. Holding Tanks. Sewage holding tanks may be considered for installation on previously developed sites, as a temporary method for periods of up to one (1) year, during which time measures are being taken to provide municipal sewer service or the installation of an approved system as provided in this Ordinance. Holding tanks may be considered on a permanent basis for nonresidential, low water use establishments generating less than one hundred fifty (150) gallons per day of waste, subject to approval by the department and the issuance of a Certificate of Compliance. Holding tanks may also be considered for floor drains for vehicle parking area and existing facilities potentially generating hazardous waste. 4. Setbacks. The following setback requirements are in addition to the setback required in Table VII in Minnesota Rules, Chapter 7080.2150.F: Minimum Setback Distances (feet) Feature Sewage tank, holding tank, or sealed privy Absorption area or unsealed privy Above-ground Swimming Pools 10 10 In-ground Swimming Pools 10 20 Shoreland Bluff Lines (18% slope) 20 20