07/27/2016 Environmental Board Minutes

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Evironmental Board July 27, 2016 Page 3 APPROVED MINUTES Floodplain Review The floodplain model completed in the resources management plan shows this area as highly suitable to development. Drinking Water Protection The eastern half of the site falls into the “moderately-susceptible to groundwater contamination” designation. Water tables are high enough in this area to make infiltration infeasible. Standards call for at least a 3 foot separation from the bottom of infiltration ponds to the water table. The developer is calling the ponds on the north side NURP. Since these ponds will be designed into the water table, a clay liner should be applied to prevent surface water contamination to the ground water. Tree Preservation The tress that are proposed for removal are in the basic use area and are allowed to be removed without replacement Wetlands No wetland on the property. Landscape Plan Discussion and Recommendations As with all past projects the City has required the escrow of enough money to plant one boulevard tree per lot frontage. The exact seed mixture must be approved by the city and applied by an approved contractor that is knowledgeable in the cultural practices of native plants. A three year maintenance plan must be submitted for the native seed area. The plan must be approved by the City. Trees planted in the native seed areas must be fire tolerant. Burr Oak and Swamp White Oak should be used. Ms. Kaufenberg asked for clarification of the clay liner in the pond. Mr. Sullivan questioned if there is room in the back of the lots for a rain garden. Mr. Heiskary agreed with the recommendation of having the rain garden in the rear of the properties if it was made to be narrow. Ms. Bor would like the staff to consider that there should be safety features around the ponds