03/30/2011 Env Bd Packet - Laserfiche WebLink

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• • • Stormwater Pollution Prevention and Storm Water Attenuation For any project, site disturbance determines the level of stormwater management. The project will create 3,572 SF of new impervious and disturb 10,629 SF. The RMP -3 Rule is not applicable at this level of activity. RMP3 Rule replaces rules B, C, F. The location and small size of disturbance does not trigger rule D, however; a Notice of Intent is needed by the Rice Creek watershed District. Rule E and I don't apply, as no floodplain or ditch system appears on the property. A concrete washout area should be shown on the plan regardless of the project size. The emphasis here is to recycle discarded concrete from the project, and remove a source of soil contamination. In the Grading and Erosion Control Notes on C2, it is stated that turf areas are to be seeded within 7 days after rough grading. Sheet L1.0 is the Landscape Plan. The infiltration area on the plan is shown as lawn. Infiltration areas should be planted with materials from the City of Lino Lakes raingarden templates. In other words a designed infiltration /raingarden landscape design should be submitted to the city for review and approval.. Any other areas that will be maintained as a lawn should be irrigated. If we are establishing an official infiltration area on this site than the area must be protected as much as possible from compaction during construction. The gas pumps are indicated in the infiltration area. Gas pumps are impervious and should be removed from the infiltration location. The gas station is on city water. There is an unused well on the west side of the building. The well was drilled in 1978 and has a drill depth of 70 feet. County well index files are a bit old but indicate that this well has not been grouted. There is a concerted effort being made to seal unused wells at the county level. This is to protect groundwater from contamination.lf this well has not been used in the past and will not be used in the future, the well should be sealed and made safe from ground water contamination. Landscaping The infiltration area should have a designed plan approved by the City of Lino Lakes. All plants in the infiltration should be potted certified nursery material. A short term (3 years) and long term maintenance plan should be submitted to ensure plant establishment and function preservation. All lawn areas must be irrigated. Trees planted in alignment along the streets should be of a larger shade tree type. Oak or Hackberry would be suitable trees. .Trees should be planted 50 feet on center. Trees should be kept back 30 feet from the lot corner, and at