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Home My WebLink AboutSW6190901_O&M Agreement_20190920Operation & Maintenance Agreement Project Name: Hoke Landing Phase 2 Project Location: Club Pond Road, Hoke County, NC Cover Page Maintenance records shall be kept on the following BMP(s). This maintenance record shall be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired, or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the pollutant removal efficiency of the BMP(s). The BMP(s) on this project include (check II th t a a apply & corresponding Bioretention Cell Quantity: r O&M tables wil Location(s): Dry Detention Basin Quantity: Location(s): Grassed Swale Quantity: Location(s): Green Roof Quantity: Location(s): Infiltration Basin Quantity: Location(s): Infiltration Trench Quantity: Location(s): Level Spreader/VFS Quantity: Location(s): Permeable Pavement Quantity: Location(s): Proprietary System Quantity: Location(s): Rainwater Harvesting Quantity: Location(s): Sand Filter Quantity: Location(s): Stormwater Wetland Quantity: Location(s): Wet Detention Basin Quantity: 1 Location(s): Disconnected Impervious Area Present: No Location(s): User Defined BMP Present: No Location(s): UU auueu auiOmaucall Lot 2 I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for each BMP above, and attached O&M tables. I agree to notify NCDENR of any problems with the system or prior to any changes to the system or responsible party. * Responsible Party: Title & Organization: Street address: City, state, zip: Phone number(s): Email: Trina T. Riddle Member Manager, Hoke Landing 3, LLC 4200 Morganton Road, Suite 150 Fayetteville, NC 28314 910-878-1266 riddlecommercialBaol_com Signature: OLLD.. Date: I, - a� r S. A.Q A - 2 S a Notary Public for the State of )bf County of 'w `p,'pi do hearby certify that I r; nay 1 . personally appeared before me this day of �, i�t$ 1' I �D and acknowledge the due execution of the ti s an Mai tena ce Agreement. Witness my hand and official % seal, `,^`Xs NOTq RY m A�QC /C Sul-Ez Version 1.4 O&M Manual 8/21/2019 Pan'. I of F Wet Detention Pond Maintenance Requirements The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. Important maintenance procedures: Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. - Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month 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 should be kept in a known set location and must be available upon request. 111aNcciw11 acuviues snail De perrormea as tollows. Any problems that are found shall be repaired immediately. BMP element: Potential problem: How I will remediate the problem: The entire BMP Trash/debris is present. Remove the trash/debris. 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. Vegetation is too short or too long. Maintain vegetation at a height of approximately six inches. The inlet device The pipe is clogged. Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. 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 Remove sediment and replace with clean stone. applicable). The forebay Sediment has accumulated to a depth greater than the original design depth for 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. sediment storage. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices show that pruning is needed Prune according to best professional practices to maintain optimal plant health. 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 a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. STORM-EZ 9/4/2019 Version 1.4 O&M Manual Page 3 of 5 Wet Detention Pond Maintenance Requirements Continued The main treatment area Sediment has accumulated to a depth greater than the original design sediment 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. storage depth. Algal growth covers over 50% of the area. Consult a professional to remove and control the algal growth. Cattails, phragmites or other invasive plants cover 50% of Remove the plants by wiping them with pesticide (do not spray). the basin surface. The embankment Shrubs have started to grow on the embankment. Remove shrubs immediately. Evidence of muskrat or beaver activity is present. Use traps to remove muskrats and consult a professional to remove beavers. A tree has started to grow on the embankment. Consult a dam safety specialist to remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. (if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of damage have occurred at the Contact the local NC Department of Environment and Natural Resources Regional Office. outlet. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. STORM-EZ 9/4/2019 Version 1.4 O&M Manual Page 4 of 5 Wet Detention Pond Design Summary Wet Pond Diaaram WET POND ID FOREBAY MAIN POND BMP-1 Permanent Pool El. 244 Permanent Pool El. 244 Temporary Pool El: 245.75 Temporary Pool El: 245.75 Pretreatment other No Clean Out Depth: 5 Clean Out Depth: 5 than forebay? Sediment Removal El: 239 Sediment Removal El: 239 Has Veg. Filter? No Bottom Elevation: 238 Bottom Elevation: 238 STORM-EZ 9/4/2019 Version 1.4 O&M Manual Page 5 of 5