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Water Quality & Runoff Reduction Volume: The NYSDEC requires reduction of the total water quality volume by green infrastructure techniques and SMP’s to replicate pre-development hydrology. Bioretention areas were incorporated into the site layout to provide the required RRv for contributing WQv runoff area for the development. The bioretention areas will provide 4,378 cf RRv. The minimum RRv required is 2,047 cf. The bioretention areas will also treat 6,349 cf of WQv. The required WQv = 10,727 cf. The sum of the WQv treated and the RRv is equal to the required WQv, therefore the practice is acceptable. Channel Protection: The NYSDEC requires that 24-Hour extended detention be provided for the proposed 1-year storm event. A volume of 5,335 cf is accommodated in the detention basin at elevation 671.04. Overbank Flooding: The NYSDEC requires that the 10-year proposed storm event be attenuated with detention and that the outlet be restricted to the 10-year existing storm event. A volume of 15,013 cf is accommodated in the detention basin at elevation 672.95. Extreme Storm Protection: The NYSDEC requires that the 100-year proposed storm event be attenuated with detention and that the outlet be restricted to the 100-year existing storm event. A volume of 34,966 cf is accommodated in the detention basin at elevation 674.73. Refer to the engineer’s report for storm sewer design criteria, runoff summary tables and stormwater drainage calculations. 113 OTHER CONTROLS 113.1 OFF-SITE VEHICLE TRACKING A stabilized construction exit will be provided to help reduce vehicle tracking of sediments. Existing paved areas will remain as long as possible and will be used for vehicle wash areas and to further aid in the reduction of vehicle tracking of sediments. The paved streets adjacent to the site entrance shall be inspected daily and swept as necessary to remove any excess mud, dirt, or rock tracked from the site. Dump trucks hauling material to/from the construction site will be covered with a tarpaulin. The job site superintendent will be responsible for seeing that these procedures are followed. 113.2 EXCAVATION SPOIL MATERIALS Excavation spoil materials are generated during the excavation of the development’s building and utilities installation. These materials must be properly managed to prevent them from contributing to storm water discharges. The materials generated from the development of this project will be hauled off-site or stockpiled for re-use in designated areas which will have temporary erosion & sediment control measures installed. Any removal from site will be done under the necessary permits required by the local governing agencies. 113.3 DUST CONTROL Minimizing wind erosion and controlling dust will be accomplished by one or more of the following methods: Multifamily Development 5/26/26 Page 13 of 23 Page 579 of 849