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HomeMy WebLinkAboutPark Place Commons at Franklin Park - Lot 4 - O&M EZ 071414_1.1 - - - - After the stormwater wetland is established, it shall be inspected monthly and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. Vegetation is too short or too long. Maintain vegetation at a height of approximately six inches. Forebay Sediment has accumulated in the forebay to a depth that inhibits the forebay from Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Remove the weeds, preferably by hand. If a pesticide is used, wipe it on the plants rather than spraying. BMP element: Potential problem: How I will remediate the problem: The perimeter of the BMP Areas of bare soil and/or erosive gullies have formed. Regrade the soil if necessary to remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one- time fertilizer application. Entire BMP Trash/debris is present. Remove the trash/debris. Remove sediment and replace with clean stone. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. The inlet device The pipe is clogged. Erosion is occurring in the swale. Regrade the swale if necessary to smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Stone verge is clogged or covered in sediment (if applicable). Unclog the pipe. Dispose of the sediment off-site. The pipe is cracked or otherwise damaged. Replace the pipe. Stormwater Wetland Maintenance Requirements Stable groundcover will be maintained in the drainage area to reduce the sediment load to the wetland. Immediately following construction of the stormwater wetland, bi-weekly inspections will be conducted and wetland plants will be watered bi-weekly until vegetation becomes established (commonly six weeks). No portion of the stormwater wetland will be fertilized after the first initial fertilization that is required to establish the wetland plants. Once a year, a dam safety expert should inspect the embankment. Important maintenance procedures: STORM-EZ Version 1.4 O&M Manual 8/15/2017 Page 2 of 3 Consult a professional to remove and control the algal growth. Cattails, phragmites or other invasive plants cover 50% of the deep pool and shallow Remove invasives by physical removal or by wiping them with pesticide (do not spray) – consult a professional. Shallow land remains flooded more than 5 days after a storm event. Unclog the outlet device immediately. Plants are dead, diseased or dying. Determine the source of the problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if necessary. Prune according to best professional practices. Sediment has accumulated and reduced the depth to 75% of the original design depth of Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Best professional practices show that pruning is needed to maintain optimal plant Stormwater Wetland Maintenance Requirements (Continued) Deep pool, shallow water and shallow land areas Algal growth covers over 50% of the deep pool and shallow water areas. Evidence of muskrat or beaver activity is present. Make all needed repairs. A tree has started to grow on the embankment. Consult a dam safety specialist to remove the tree. An annual inspection by appropriate professional shows that the embankment Consult a professional to remove muskrats or beavers. The outlet device is damaged Repair or replace the outlet device. Micropool Sediment has accumulated and reduced the depth to 75% of the original design depth. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off-site. Embankment The receiving water Erosion or other signs of damage have occurred at the outlet. Contact the local NC Department of Environment and Natural Resources Regional Office. STORM-EZ Version 1.4 O&M Manual 8/15/2017 Page 3 of 3