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Created: 2022-07-19 16:13:06 [EST] (Supp. No. 20, Update 2) Page 6 of 10 Sec. 79-8. Stormwater pollution prevention plan review process. (a) Process. For any subdivision, the stormwater pollution prevention plan shall be submitted with the preliminary plat application. For all other applications, the stormwater pollution prevention plan meeting the requirements of section 79-7 and minimum BMP requirements of section 79-9 must be reviewed by the city engineer or designated representative who may approve, approve with conditions, or deny the stormwater pollution prevention plan prior to any land disturbing activity on the site. (b) Duration. Approval of a stormwater pollution prevention plan submitted under the provisions of this article shall expire one single year after the date of approval unless construction has commenced in accordance with the plan. However, if prior to the expiration of the approval, the owner makes a written request to the city for an extension of time to commence construction setting forth the reason for the requested extension, the city engineer may grant one extension of not more than one single year. Receipt of any request for an extension shall be acknowledged by the city within 15 days. The city shall make a decision on the extension within 30 days of receipt. Any plan may be revised in the same manner as originally approved. (c) Conditions. A stormwater pollution prevention plan may be approved subject to compliance with conditions reasonable and necessary to ensure that the requirements contained in these regulations are met. Such conditions may, among other matters, limit the size, kind or character of the proposed development, require replacement of vegetation, establish required monitoring procedures, stage the work over time, or require alteration of the site design to ensure buffering, and require the conveyance to the city or other public entity of certain lands or interests therein. (d) Financial security. The adequacy, conditions and acceptability of any financial security shall be determined by the city. (Ord. No. 55 3rd series, § 1, 4-13-2009; Ord. No. 69 3rd series, § 1, 4-12-2010) Sec. 79-9. Minimum SWPPP Best Management Practices (BMPs). (a) [Plan standards required.] No stormwater pollution prevention plan that fails to meet the standards contained in this section shall be approved by the city council or designated representative. (b) Minimum standards. Best management practices, inspection, and maintenance shall meet the minimum standards outlined by the Minnesota Pollution Control Agency’s NPDES/SDS Construction Stormwater General Permit MNR100001 (CSW Permit), the MPCA’s Small Municipal Separate Storm Sewer Systems General Permit MNR040000 (MS4 Permit), and Minnehaha Creek Watershed District Rules as now constituted and from time to time amended. Site dewatering. Water pumped from the site shall be treated by temporary sedimentation basins, grit chambers, sand filters, upflow chambers, hydrocyclones, swirl concentrators or other appropriate controls as appropriate. All water from dewatering must be discharged in a manner that does not cause nuisance conditions, erosion in receiving channels or on downslope properties, or inundation in wetlands causing significant adverse impact to the wetland. All discharge points must be adequately protected from erosion and scour. The discharge must be dispersed over natural rock riprap, sand bags, plastic sheeting or other accepted energy dissipation measures. Adequate sedimentation control measures are required for discharge water that contains suspended solids. (c) Construction site waste. (1) Waste and material disposal: All waste, unused building material (including garbage debris, cleaning wastes, wastewater, toxic materials or hazardous materials), collected sediment, asphalt and concrete millings, floating debris, paper, plastic, fabric, construction and demolition debris and other wastes