02/22/2006 Env Bd Packet - Laserfiche WebLink

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• • • should be noted that even though rare plants may not be found in a site survey, it does not mean that rare plant seed banks do not exist and a restoration project be successful in bringing these plants back. Other Surface Water Credit/BMP Considerations. Water from impervious surfaces should be directed to a grassy area first instead of down driveways into storm sewers. This should include provision that all roof drains must be directed to the grassy areas. There should be a requirement that alI'turf areas be loosed before sod is placed. All top soil should be completely tilled into the soil. No soils should be imported or exported with out City approval. Suggest a system of curb -cuts and rain - gardens along street scapes as a more integrated approach to Surface Water Treatment Train. Roof top, driveway and street runoff could be directed to these gardens and have a significant effect on stormwater volumes leaving the site. Since Private Drive West has only two storm water inlets on a very long stretch of road, the rain gardens would have ample opportunity to capture surface water runoff. Stormwater Pollution Prevention The Developer has submitted a storm water pollution prevention plan. The plan is included as Attachment 12. The plan has most of the issues covered. The "Inspection and Maintenance "notes section" should add that all inspection records and the SWPPP will be maintained on the site in a designated location and available to inspectors at all times. The developer must state where this location will be on the site. Most convenient is a mailbox. The rock entrance described in the SWPPP should be at least 50 feet long. The large scale map was unreadable. In addition, it is suggested that additional stockpile of 1.5 inch rock be maintained on the site to top dress the entrance when rock pore space is filled. The City would prefer the Infrasafe Debris Collection Device (or a suitable substitute) for storm sewer inlet protection. These must be used on all constructed and existing storm water inlets. If there are anticipated concerns with soil movement along Ware Road, these devices should be used there. A street sweeping schedule should be submitted that is acceptable to the City on all interior and exterior roads used for the project. Landscaping Escrow money should be allocated to provide 1 tree per street frontage on all new lots. A landscape plan should be submitted with a plan to screen all adjacent properties that are affected. Credit for existing and preserved trees that afford screening should be applied. The landscape plan should show all seeded areas and the native City seed mix shown on the plan specifications. A landscape contractor that is experienced with the installation of native seed should be approved by the City.