09/10/2003 Env Bd Packet - Laserfiche WebLink

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Record of Decision City of Lino Lakes • There are no floodplain impacts associated with the proposed project. Water Quality Impacts The creation of new detention facilities will address the increased quantities of runoff resulting from increases in impervious surfaces. Surface water runoff will first be conveyed by new storm sewer and then discharged into storm water ponds prior to discharge into receiving water bodies. Storm water ponds will provide for rate control as well as treatment. The City of Lino Lakes has storm water policies and design standards that will need to be satisfied by the proposed development to reduce the introduction of pollutants to wetlands and the area waterbodies (i.e. Anoka County Ditch No. 10 and Marshan Lake). Furthermore, the storm water treatment system will need to incorporate standards and rules of the Rice Creek Watershed District that also governs surface water planning within the project area. The proposed treatment and retention system includes the creation of water quality ponds, vegetative filter strips, drainage swales, and infiltration basins. Before construction can proceed, both the City of Lino Lakes and Rice Creek Watershed District (RCWD) must issue permits to satisfy surface water runoff regulations. A National Pollutant Discharge Elimination System (NPDES) 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 permit. BMP's will include an erosion control plan and BMP's used in the Minnesota Department of Transportation's (Mn/DOT) standard specifications, details, and special provisions. Temporary and permanent erosion control measures will include timely revegetation of disturbed areas, hay bales, silt fencing, flotation silt curtains, and sedimentation ponds. Hazardous Waste A Phase I Environmental Site Assessment (ESA) was completed for the proposed project in June 2003. A copy of the Phase I report is on file at the City of Lino Lakes Government Center. Based on records review, on -site reconnaissance, and interviews the following suspect environmental conditions were identified on and in the vicinity of the proposed development area: • An adjacent closed LUST (leaking underground storage tank) site located south adjacent to the proposed project area was identified, as currently and historically, to likely have involved the use of significant quantities of hazardous substances and /or petroleum products. The site historically and currently was observed to have poor outdoor housekeeping practices. With the exception of the closed LUST listing, no releases related to the historical or current uses have been reported for the adjacent site. DRAFT