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Home My WebLink AboutSW6210102_O&M Agreement_20210413Project Name: Project Location: Four Sierra Ranch Cumberland County, NC Cover Page 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: onding O&M sheets will 1 Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): No Location(s): No Location(s): Yes Type: be added automatically): Lot 7 Four Sierra Ranch NOTE Infiltration basin is not required for compliance with the post -construction permit. Ve etated swaies/roadside ditches 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: Stout Land Development, LLC Benjamin Stout PO Box 53798 Fayetteville, NC 28305 910-476-4502 ben@benstoutconstruction.com Date: I, , a Notary Public for the State of County of ftt M r , do hereby certify that , w personally appeared before me this day of and acknowledge the due execution of the Operations and Maintenance Agreement. Witness my hand and official seal, . Seal My commission expires %t • A • 2 STORM-EZ 4/9/2021 Vpr,Mnn 1 r. O&M Agreement Page 1 of 1 Infiltration Basin Maintenance Requirements Important operation and maintenance procedures: - The drainage area will be carefully managed to reduce the sediment load to the infiltration basin. No portion of the infiltration basin will be fertilized after the initial fertilization that is required to - establish the vegetation. Lime may be allowed if vegetation is planted on the surface of the infiltration basin and a soil test shows that it is needed. - The vegetation in and around the basin will be maintained at a height of four to six inches. After the infiltration basin 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: How to remediate the problem: The entire infiltration Trash/debris is present. Remove the trash/debris. basin 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 - The grass filter strip or formed. time fertilizer application. other pretreatment area Sediment has Search for the source of the sediment and remedy the problem accumulated to a depth of if possible. Remove the sediment and dispose of it in a location greater than three inches. where it will not cause impacts to streams or the SCM. The structure is clogged. Unclog the conveyance and dispose of any sediment in a The flow diversion (location where it will not cause impacts to streams or the SCM. structure (if applicable) Make any necessary repairs or replace if damage is too much The structure is damaged. for repair. The inlet pipe is clogged (if ,Unclog the pipe and dispose of any sediment in a location applicable). where it will not cause impacts to streams or the SCM. The inlet pipe is cracked or otherwise damaged (if Repair or replace the pipe. applicable). The inlet device 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 erosion problems. Stone verge is clogged or Remove sediment and clogged stone and replace with clean covered in sediment (if stone. applicable). More than four inches of Search for the source of the sediment and remedy the problem sediment has if possible. Remove the sediment and dispose of it in a location accumulated. where it will not cause impacts to streams or the SCM. The basin .Erosion of the basin surface has occurred or Provide additional erosion protection such as reinforced turf riprap is displaced. matting or riprap if needed to prevent future erosion problems. Water is standing more Replace the top few inches of soil to see if this corrects the than three days after a standing water problem. If not, consult an appropriate storm event. professional for a more extensive repair. Infiltration Basin (Maintenance Requirements (continued) SCM element: Potential problem: How to remediate the problem: Shrubs or trees are growing on the Remove shrubs and trees immediately. embankment. The embankment An annual inspection by an appropriate professional Make needed repairs immediately. shows that the embankment needs repair. Clogging has occurred. gg g Clean out the outlet device and dispose of sediment in a location where it will not cause impacts to streams or the SCM. The outlet device The outlet device is Repair or replace the outlet device. damaged Erosion or other signs of damage have occurred at Repair the damage and improve the flow dissipation structure. the outlet. The receiving water Discharges from the infiltration basin are causing erosion or Contact the local NCDEQ Regional Office. sedimentation in the receiving water. Low Density Maintenance Requirements Important maintenance procedures: The drainage area to the vegetated conveyance or vegetated receiving area will be carefully managed to reduce the sediment load to the vegetated conveyance or vegetated receiving area. After the initial fertilization to establish the grass in the vegetated conveyance or the vegetated receiving area, fertilizer will not be applied to the vegetated receiving areas. The vegetated conveyance or vegetated receiving area will be inspected quarterly. 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. SCM element: Potential problem: How to remediate the problem: Vegetation is too short or Maintain grassed vegetation such that the swale or vegetated Vegetation too long. area does not erode during the peak flow from the 10-year storm Trash/debris is present. Remove the trash/debris. Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then re - erosive gullies have sod (or plant with other appropriate species) and water until Vegetated receiving formed. established. Provide lime and a one-time fertilizer application. areas Trees and/or other woody Remove the trees and woody vegetation from the swale, vegetation are present in regrade the swale if necessary and re-establish grass as shown the swale. on the approved plans. Trash/debris is present. Remove the trash/debris. Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then re - erosive gullies have sod (or plant with other appropriate species) and water until formed. established. Provide lime and a one-time fertilizer application. Sediment covers the grass 'Remove sediment and dispose in an area that will not impact Vegetated conveyances / at the bottom of the swale. streams or SCMs. Re -sod if necessary. swales / roadside ditches Regrade the slopes to the permitted configuration per the (other than curb outlet The side slope is steeper approved plan and reestablish vegetation. If as -built or existing swales) than the approved do not allow the slopes to be regraded, contact the configuration. iconditions applicable permitting agency. Determine the source of the problem: soils, hydrology, disease, Grass is dead, diseased or etc. Remedy the problem and replace plants. Provide a one - dying. time fertilizer application to establish the ground cover if necessary. Trees and/or other woody Remove the trees and woody vegetation from the vegetated vegetation are present in conveyance, regrade the vegetated conveyance if necessary the vegetated conveyance. and re-establish grass as shown on the approved plans. Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device (if applicable) The outlet device is Repair or replace the outlet device. damaged Erosion or other signs of damage have occurred at Repair the damage and improve the flow dissipation structure. the outlet. Discharges from the site The receiving water are causing erosion or Contact the local NCDEQ Regional Office. sedimentation in the receiving water.