3301 LOMBARD AVE COMPASS HEALTH SUPPORTIVE HOUSING 2022-02-18

STORMWATER SITE PLAN NOVEMBER 7, 2019 COMPASS HEALTH SUPPORTIVE HOUSING PAGE 4 MR2: CONSTRUCTION STORMWATER POLLUTION PREVENTION 1. CONSTRUCTION STORMWATER POLLUTION PREVENTION ELEMENTS This Construction Stormwater Management Plan has been prepared for the Compass Health Supportive Housing project. The site will have less than 1 acre of disturbed area. The 13 Required Elements are addressed as follows: Element #1: Preserve Vegetation/Mark Clearing Limits There is no natural vegetation. Clearing limits fencing will mark the south edge of construction. All other edges are marked by existing frontage improvements. BMP C101, Preserving Natural Vegetation: Vegetation on the majority of the site will not be disturbed and will help filter any sediment laden runoff from the building area. BMP C103, High Visibility Plastic or Metal Fencing: This fencing will be used to mark the limits of clearing to help prevent excessive removal of native vegetation on the site. Element #2: Establish Construction Access The building will fill the site. The contractor will need to work with Public Works for suitable staging in the street or alley rights of way. BMP C105, Stabilized Construction Entrance and Tire Wash: Construction access will be taken from the existing gravel driveway near the property. As the project is fairly small it is expected that the gravel driveway will function adequately and a more formal construction access should not be required. Element #3: Control Flow Rates The detention pipe will be constructed with the foundation of the building and will be able to serve for flow control early in construction. See MR7 for additional information. Element #4: Install Sediment Controls Sediment controls will be installed to suit the progress of construction. These will include: BMP C233, Silt Fence: Filter fabric fencing will be used downhill of grading activities where insufficient existing vegetation exists to filter the runoff. Element #5: Stabilize Soils In planting areas the exposed soils will be stabilized with lawn and landscaping while walkways and building slabs will be covered by the base course rock of the design section Temporary stockpiles will be covered with plastic. BMP C121, Mulching: During construction, mulch can be placed to prevent raindrops from impacting exposed soils causing erosion. Straw is the most common method of mulching. P:\Work\Projects\2017\17-125 Environmental Works\CE\DOCS\Final SSP 17-125.doc