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. . , . 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) i 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 senes, § 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) ; 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 +II 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) 'fll Waste and material disposal:All waste, unused building material (including garbage debris, i 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 must be properly contained on site and disposed of off site, not allowed to be carried by runoff into receiving channel or storage sewer system. �I I; �2) Hazardous maferials: Oil, gasoline, paint and any hazardous substances must be properly i stored, including secondary containment, to prevent spill, leaks or other discharge. Restricted access to storage areas must be provided to prevent vandalism. Concrete wash - must be limited to a defined area of the site and runoff must be contained within the defined ' area. Storage of hazardous waste must be in compliance with MPCA regulations. , �3) �1