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7 52. Treatment Level. Treatment system performance levels defined in Minnesota Rules, Chapter 7083.4030, Table III for testing of proprietary treatment products, which include the following: Level Parameters CBOD5 TSS O&G FC Nutrient (mg/l) (mg/l) (mg/l) (#/100ml) (mg/l) A 15 15 - 1,000 - A-2 15 15 - - - B 25 30 - 10,000 - B-2 25 30 - - - C 125 60 - - - 53. Trench. A soil treatment and dispersal system, the absorption width of which is 36 inches or less. 54. Type I System. An ISTS that follows a standard trench, bed, at-grade, mound, or graywater system design in accordance with MPCA rules, Minnesota Rules, Chapter 7080.2200 through 7080.2240. 55. Type II System. An ISTS on a lot located in a floodplain, a privy or a holding tank in accordance with MPCA rules, Minnesota Rules, Chapter 7080.2250 through 7080.2290. 56. Type III System. An ISTS having acceptable flow restriction devices to allow its use on a lot that cannot accommodate a standard Type I soil treatment and dispersal system in accordance with MPCA rules, Minnesota Rules, Chapter 7080.2300. 57. Type IV System. An ISTS, having an approved pretreatment device and incorporating pressure distribution and dosing, that is capable of providing suitable treatment for use where the separation distance to a shallow saturated zone is less than the minimum allowed in accordance with MPCA rules, Minnesota Rules, Chapter 7080.2350 58. Type V System. An ISTS, which is a custom engineered design to accommodate the site taking into account pretreatment effluent quality, loading rates, loading methods, groundwater mounding, and other soil and other relevant soil, site, and wastewater characteristics such that groundwater contamination by viable fecal organisms is prevented in accordance with MPCA rules, Minnesota Rules, Chapter 7080.2400. 59. Unsewered Area. Any area within the city not served by a municipal sanitary sewer collection system permitted by the MPCA. 60. Wellhead Protection Area. The surface and subsurface area surrounding a well or well field that supplies a public water system, through which contaminants are likely to move toward and reach the well or well field as regulated under Minnesota Rules, Chapter 4720. For the purposes of this chapter, wellhead protection area is that area bounded by the drinking water supply management area as regulated under Chapter 4720. Section 6. Scope. This Ordinance regulates the sitting, design, installation, alterations, operation, maintenance, monitoring, and management of all SSTS within the City’s applicable jurisdiction including, but not necessarily limited to individual SSTS and cluster or community SSTS, privy vaults, and other non-water carried SSTS. All