01/31/2007 Env Bd Packet - Laserfiche WebLink

Home Search

• Referring to the submitted Grade Plan (Attachment 4), surface water runoff is directed to a NURP (National Urban Runoff Pond), out of that pond with a skim pipe (no elevation determined on outlet) into an infiltration pond, then piped to the south side of the project and released. Additional infiltration may be achieved if this piped section were replaced with open drainage swale with check dam berms and native vegetation planted. Recommend the City engineer look at this option. Access locations to pond and infiltration areas must be shown on the map. There are more parking stalls being proposed for Retail and Stationstore than are the minimum required. Parking should be kept to the minimum required. It would be beneficial if the developer would be willing to use permeable pavers in some of the parking areas, then it does not matter how much parking is proposed. Pump Stations: Pumps stations should be designed with spill- containment feature. Car wash: Car wash should drain to sanitary sewer. It is unclear from the map whether wash water is going to sanitary sewer or storm sewer. BMP's to keep prosperous and other car wash residue on site should be used. Previous car wash projects have designed pervious surfaces at the car wash exit. Recommend this design be looked at. Storm Water Pollution Prevention Plan: There are two pages that describe the SWPPP. Attachments 8 and 9 are called Erosion Control Plan and Erosion Control Details respectively. These two sheets should be called Storm Water Pollution Prevention Plan or SWPPP. Tree Preservation: The plans should include a tree inventory. The only trees on the site are trees to the West of the existing building. The trees are red oak, pine, and boxelder. The plan should indicate these trees as removals. Landscape Plan: A landscape plan is provided as Attachment 10. Sod planted areas must be irrigated. Top soil should be tilled as deeply as possible into existing sub - soils. Screening the western property line must meet 80% opacity. I would not rely on existing pines on the neighbor's property to provide this screening in that they are overstocked, disease prone, and storm damaged. Storm pond and infiltration areas should be planted with the City native seed mix and modified with enhancement plant plugs to achieve flowering forbs at a density of one every 5 feet. A planting schedule should be submitted with native seed and plants included. A contract with a City approved landscape company, that is knowledgeable and experienced in native plant installation and maintenance, should be submitted. The contract should cover installation and maintenance for