07/11/2007 P&Z Packet - Laserfiche WebLink

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• • • Memorandum ENVIRONMENTAL To: Paul Bengtson From: Marty Asleson Date: May 31, 2007 Re: May 30, 2007 Environmental Board Recommendations The following recommendations were made concerning Grandview. 1. Sizing must be verified for volume storage, runoff rate and infiltration requirements on proposed infiltration and storage ponds. 2. All infiltration areas must be protected from construction as part of the Storm Water Pollution Prevention Plan. 3. All infiltration, pond, and disturbed wetland areas must be planted with the City native seed mix and managed by a company listed with the Minnesota DNR as recommended for such work for a period of at least 3 years. 4. Plan should show access for pond and infiltration area maintenance. 5. Suggest that all houses direct runoff from impervious to pervious grass areas through the use of downspouts. 6. A temporary sediment pond should be installed somewhere on the site that will accept construction water from storm events. 7. Developer shall prepare brochure for new home owners. The brochure should discuss the importance of water treatment and that some areas may be a bit wet after a storm. Other information should include Shoreland Overlay district restrictions on vegetation removal. City will review and approve document before being given to homeowner. 8. The developer has submitted a Storm Water Pollution Prevention Plan (SWPPP). The SWPPP must be approved and implemented prior to the commencement of a grading permit. A number of modifications to the SWPPP have been identified and will need to be incorporated into the final plan as identified in the attached SWPPP memo. 9. Developer should check with the Minnesota DNR on how to develop with National Heritage concerns in the area.