04/27/2016 Environmental Board Minutes

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Evironmental Board April 27, 2016 Page 3 Drinking Water Protection - Excavated areas that may hit a non -confining layer must be sealed. The sealing must be accomplished so that ground water contamination does not occur, or confining wetland are not drained. Pollution Investigation - Recommendation: Seal well with CWI FID number 66451, unique number 00440015 under the name of Arnold Thies. Restore the irrigation well if possible and record the well with the Department of health with the State of Minnesota. If not used, seal the irrigation well. Remove any septic systems on the property. Follow the recommendations of Phase One and Phase Two studies; that is, properly dispose of contamination issues from septic, well whole abandonment, buried lime, and other buried hazardous waste and construction materials. gggs Tree Preservation - Recommendation: Remove all Ash, American Elms, Silver Maples and Cottonwoods that would be classified as hazardous trees, and /or trees listed as declining, unhealthy, and any species growing in preserved wetland sites on the "Tree Save List". All recommended tree removals from the "Save" list would not be considered a replacement tree. Wetlands - Recommendation: All wetlands must be buffered according to standards, including a minimum of 10 -foot requirement next to residential lots, and 50 -foot average in the RCWD wetland management corridor. Signs marking buffer areas in these areas and pond areas should be placed in each back yard notifying of no encroachment. A plan to ensure long-term hydrology for these wetlands must be provided. A plan to ensure long-term hydrology for these wetlands must be provided. All excavations on the site that drain existing or proposed wetlands should be sealed. `888890.. ADD — Have a management plan of the wetlands Lighting — Energy efficient Led lighting with minimum standards and fixtures should be downward focus Landscape Plan Discussion and Recommendations — The developer must escrow enough dollars to plant on boulevard tree on each frontage of properties bordering a street. City Planning will verify plant numbers in relationship to zoning code requirements for replacements. Recommendation: A soils management plan be sequenced in to the construction detail sheet to provide for uncompact soils that will support plant root growth. Top soil should be incorporated into subsoils by ripping or spade tilling prior to placement of plant materials. Noise — A noise study was completed on March 28, 2016. Predicated daytime sound levels at residential lots along I35E are generally within the standard. Nighttime levels exceed the standard but exceptions to the state rules permit the higher standards to be applied and nighttime standard can be met. Further sound reductions can be added to house construction elements if found to be necessary. APPROVED MINUTES