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HomeMy WebLinkAboutSW5210601_O&M Agreement/Plan_20210610tion & Maintenance Agreement Project Name: Project Location: St Stephen Missionary Baptist Church 518 S Pine Street, Spring Hope, NC 237882 Cover Eme— Maintenance records shall be kept on the following SCM(s). This maintenance record shall be kept in a log in a known set location. Any deficient SCM 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 SCM(s). The SCM(s) on this project include (check all that apply & co Infiltration Basin Quantity: Infiltration Trench Quantity: Bioretention Cell Quantity: Wet Pond Quantity: Stormwater Wetland Quantity: Permeable Pavement Quantity: Sand Filter Quantity: Rainwater Harvesting Quantity: Green Roof Quantity: Level Spreader - Filter Strip Quantity: Proprietary System Quantity: Treatment Swale Quantity: Dry Pond Quantity: Disconnected Impervious Surface Present: User Defined SCM Present: Low Density Present: pondi g O&M sheets will Location(s): Location(s): Location(s): 1 Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): 1 Location(s): Location(s): Location(s): Location(s): No Location(s): No Locatio-n(s): I ype: be added automatically): Northwest corner of project area Northwest corner of project area I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for each SCM above, and attached O&M tables. I agree to notify NCDEQ 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: Signature: S c�12 , - n Hope. C- 21E ';-25'a -4-7-5� -' '5-6CIF i we r(IA- j) ht)-tfna; 1, 6on-7 , a Notary Public for the State of Date: County of do hereby certify that r I c�. S-Q,,.3e I t - (Z Zs k-e personally appeared before me this U day of Mo,!4 7—%D ILI I acknowledge the due execution of th 0 erations and Maintenance Agreement Witness my hand and official seal, ct"L- EANGELA M CLARK NOTARY PUBLIC NASHCOUNTN� NORTH CAROLINA 'OMMI SIO MY COMMISSION rXPIRESL���- and Seal My commission expires STORM-EZ 5/19/2021 Version 1.5 O&M Agreement Page 1 of 1 Wet Pond Maintenance Requiroments Important operation and 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 pond should be fertilized after the initial fertilization that is required to establish the plants on the vegetated shelf. Stable groundcover will be maintained in the drainage area to reduce the sediment load to the wet pond. If the pond must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain will be minimized as much as possible. At least once annually, a dam safety expert will inspect the embankment. Any problems that are found will be repaired immediately. 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. After the wet pond is established, it will be inspected quarterly 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 shall be kept in a known set location and shall be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. SCM element: Potential problem: Trash/debris is present. Area . s of bare soil and/or How to remediate the problem: Remove the trash/debris. Regrade the soil if necessary to remove the gully, plant ground The entire wet pond The perimeter of the wet pond erosive gullies have cover and water until it is established. Provide lime and a one - formed. time fertilizer application. The inlet pipe is clogged (if applicable). Unclog the pipe. Dispose of the sediment off -site. The inlet pipe is cracked The inlet device or otherwise damaged (if Repair or replace the pipe. applicable). Erosion is occurring in the Regrade the swale if necessary and provide erosion control swale (if applicable). devices such as reinforced turf matting or riprap to avoid future problems with erosion. Sediment has accumulated to a depth Search for the source of the sediment and remedy the problem greater than the original if possible. Remove the sediment and dispose of it in a design depth for sediment location where it will not cause impacts to streams or the SCM. storage. The forebay 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. Wet Pond Maintenance Requirements (Continued) SCM element: Potential problem: How to remediate the problem: Sediment has accumulated to a depth Search for the source of the sediment and remedy the problem greater than the original if possible. Remove the sediment and dispose of it in a design sediment storage location where it will not cause impacts to streams or the SCM. depth. Algal growth covers over 50% of the area. The main treatment area Consult a professional to remove and control the algal growth. Cattails, phragmites or other invasive plants Remove the plants by wiping them with pesticide (do not cover 50% of the basin spray). surface. Best professional practices show that pruning is needed to Prune according to best professional practices. maintain optimal plant health. Plants are dead, diseased Determine the source of the problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. The vegetated shelf or dying. 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. Shrubs have started to grow on the embankment. Remove shrubs immediately. Evidence of muskrat or Consult a professional to remove muskrats or beavers and beaver activity is present. repair any holes or erosion. A tree has started to grow on the embankment. Consult a dam safety specialist to remove the tree. The embankment An annual inspection by an appropriate professional shows that Make all needed repairs immediately. the embankment needs repair. Clogging has occurred. Clean out the outlet device and dispose of any sediment in a location where it will not cause impacts to streams or the SCM. The outlet device The outlet device is damaged. Repair or replace the outlet device. Floating wetland island (if applicable) Weeds or volunteer trees are growing on the mat. Remove the weeds or trees. The anchor cable is damaged, disconnected or Restore the anchor cable to its design state. missing. Wet Pond Maintenance Requirements (Continued) SCM element: Potential problem: How to remediate the problem: Erosion or other signs of damage have occurred at Repair the damage and improve the flow dissipation structure. the outlet. Discharges from the wet The receiving water pond are causing erosion Contact the local NCDEQ Regional Office. or sedimentation in the receiving water. Wet Detention Pond Design Summary Wet Pond Dia-ararn WET POND ID Wet Pond j Pretreatment other No than forebay? Has Veg. Filter.? Q FOREBAY Permanent Pool El. 259 Temporary Pool El: 260.34 Clean Out Depth: 4 Sediment Removal E 255 Bottom Elevation: 256 MAIN FUND Permanent Pool El. 259 Temporary Pool El: 260.34 Clean Out Depth: 6 Sediment Removal E 253 Bottom Elevation: 254 Level Spreader -Filter Strip Maintenance Requirements Important operation and maintenance procedures: Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). Stable groundcover will be maintained in the drainage area to reduce the sediment load to the level spreader -filter strip. Every two weeks during the growing season, the filter strip will be mowed. Turf grass should not be cut shorter than 4-6 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC, 1993). Once a year, the soil will be aerated if necessary and the filter strip will be reseeded to maintain a dense growth of vegetation. Once a year, soil pH will be tested and lime will be added if necessary. For the fist two years after the LS-FS is established, it shall be inspected quarterly and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). After two years of successful performance, it will be inspected quarterly. Records of operation and maintenance shall be kept in a known set location and shall be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. SCM element: Potential problem: How to remediate the problem: The entire ILS-FS Trash/debris is present. Remove the trash/debris. The flow splitter device is Unclog the conveyance and dispose of any sediment off -site. The flow splifter device clogged. The flow splitter device is (if applicable) Make any necessary repairs or replace if damage is too large for damaged. repair. Remove the sediment and dispose of it off -site. The swale is clogged with sediment. The blind swale Mow vegetation. Regrade and vegetate if the swale has become The swale is overgrown with vegetation. silted in. The level lip is cracked, settled, undercut, eroded or Repair or replace the lip. otherwise damaged. There is erosion around the Regrade the soil to create a berm t hat is higher than the level lip, The level spreader end of the level spreader that show stormwater has plant ground cover and water until it is established. Provide lime bypassed it. and a one-time fertilizer application. Trees or shrubs have begun to grow on the swale Remove the shrubs or trees. or just downslope of the level lip. Areas of bare soil and/or Regrade the soil if necessary to remove the gully, plant ground erosive gullies have cover and water until it is established. Provide lime and a one - formed. time fertilizer application. The bypass channel Turf reinforcement is Study the site to see if a larger bypass channel is needed damaged or ripap is rolling (enlarge if necessary). After this, reestablish the erosion control downhill. material. Level Spreader -Vegetated Filter Strip Maintenance Requirements (continued) Iscm element: I Potential problem: I How to remediate the problem: The filter strip The receiving water Grass is too short or too Maintain grass at a height of approximately three to six inches. long. Regrade the soil if necessary to remove the gully, plant ground Areas of bare soil and/or erosive gullies have cover and water until it is established. Provide lime and a one - formed. time fertilizer application. Sediment is building up on Remove the sediment and restabilize the soil with vegetation if the filter strip. necessary. Provide lime and a one-time fertilizer application. Grass is dead, diseased or Determine the source of the problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time dying. fertilizer application to establish the ground cover if necessary. Determine the source of the problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time Plants are dead, diseased fertilizer application to establish the ground cover if a soil test or dying. indicates it is necessary. If sod was used, check to see that it was not grown on clay or impermeable soils. Replace sod if necessary. Nuisance vegetation is Remove vegetation by hand if possible. If pesticide is used, do choking out the grass. not allow it to get into the receiving water. Erosion or other signs of damage have occurred at Repair the damage and improve the flow dissipation structure. the outlet. Discharges from the LS-FS are causing erosion or Contact the local NCDEQ Regional Office. sedimentation in the receiving water.