01/21/2004 Env Bd Packet - Laserfiche WebLink

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Legacy at Wood's Edge Record of Decision City of Lino Lakes January 2004 proposed project does not lie within a delineated 100 -year floodplain. Water Quality Impacts A surface water management plan for the development is being proposed that will retain storm water runoff on -site for the purpose of improving water quality and incorporate infiltration to reduce surface discharge and promote recharge of the groundwater. To comply with City and Rice Creek Watershed District requirements, the surface water management plan has addressed rate control by utilizing proposed ponds and existing wetlands for live storage. The development proposes to construct a drainage system within all the street improvements and parking areas to convey runoff to proposed ponding areas and infiltration cells (green space or underground storage chambers). Subsurface chamber technology takes advantage of the soil's inherent filtration and renovation capabilities to store and treat storm water runoff while providing the flexibility to plan for additional buildings and green space. To maximize pollutant removal efficiencies, the water quality control structures will be designed and constructed according to NURP, the National Pollutant Discharge Elimination Systems (NPDES) Phase II permit, the City of Lino Lakes, and Rice Creek Watershed District standards. Based on a water quality analysis, the proposed development will maintain adequate area for the retention (ponds) and infiltration (natural and underground chambers) of surface water runoff. Before construction can proceed, both the City of Lino Lakes and Rice Creek Watershed District must issue permits to satisfy surface water management regulations. The project will eliminate two existing infiltration basins along the north side of Town Center Parkway. These basins will be replaced elsewhere on the site. A National Pollutant Discharge Elimination System (NPDES) Phase II permit will be required for this project. Erosion prevention and sediment control best management practices (BMP's) will be used in accordance with the NPDES Phase II permit. An erosion control plan will be developed for the site and will likely include temporary and permanent erosion control measures such as timely revegetation of disturbed areas, hay bales, silt fencing, flotation silt curtains, and sedimentation ponds. Hazardous Waste A Phase I Environmental Site Assessment was completed for the site in May 2003. The assessment revealed the following environmental conditions in connection with the site: • Two above - ground storage tanks, likely holding petroleum products, are currently located and in use along the north end of the site; • An area of cars and miscellaneous vehicles are located on the, northeastern portion of the site; and DRAFT