(A) SSTS built before April 1, 1996, outside of areas designated as shoreland or wellhead protection areas, or SSTS providing sewage treatment for food, beverage, or lodging establishments must have at least two feet of vertical separation between the bottom of the dispersal system and seasonal saturation or bedrock.
(B) SSTS built after March 31, 1996, or SSTS located in shoreland or wellhead protection areas, or SSTS providing sewage treatment for food, beverage, or lodging establishments as defined under Minnesota Rules, Chapter 7088.1100, subp. 84 shall have a three 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 15% 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 shall be considered compliant under this chapter. The vertical separation measurement shall be made outside the area of system influence but in an area of similar soil.
(Ord. 1, passed 3-25-2015)