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10 <br /> Pond(Wet Detention Basin) <br /> Location: PIN9874-71-1038 <br /> This system does not incorporate vegetated filters at the outlets. <br /> This system does not incorporate pre-treatment and does not have a forebay. <br /> Important operation and maintenance procedures: <br /> • No portion of the wet detention pond should be fertilized except for a one-time fertilization,if necessary,to establish <br /> vegetation after maintenance work. <br /> • Stable groundcover shall be maintained in the drainage area to reduce the sediment load to the wet detention basin. <br /> • If the basin must be drained for an emergency or to perform maintenance,the flushing of sediment through the emergency <br /> drain shall be minimized to the maximum extent practical. <br /> • Once a year,a dam safety expert shall inspect the embankment. <br /> After the wet detention pond is established,it shall be inspected once a month and within 24 hours after every storm event greater <br /> than 1.0 inches.Records of operation and maintenance shall be kept in a known set location on the project site and shall be made <br /> available upon request. <br /> Inspection activities shall be performed as follows.Any problems that are found shall be repaired immediately. <br /> SCM Element: Potential Problem: How Property Owner Will Remediate the <br /> Problem: <br /> The Entire SCM Trash/Debris is present. Remove the trash/debris <br /> The Perimeter of the Wet Areas of bare soil and/or erosive gullies Re-grade the soil if necessary to remove the <br /> Detention Basin have formed. gully,and then plant a ground cover and water <br /> until it is established.Provide lime and a one- <br /> time fertilizer application. <br /> Vegetation is too short or too long. Maintain vegetation at a height of <br /> approximately 6 inches. <br /> The Inlet Device: Pipe or Swale The pipe is clogged. Unclog the pipe.Dispose of the sediment off- <br /> site. <br /> The pipe is cracked or otherwise Replace the pipe. <br /> damaged. <br /> Erosion is occurring in the Swale. Re-grade the swale if necessary to smooth it <br /> over and provide erosion control devices such <br /> as reinforced turf matting or riprap to avoid <br /> future problems with erosion. <br /> The Main Treatment Area Algal growth covers over 50%of the Consult a professional to remove and control <br /> area. the algal growth. <br /> Cattails,phragmites or other invasive Have a licensed aquatic pesticide applicator <br /> plants cover 50%of the basin surface. treat the weeds by wiping aquatic glyphosate on <br /> the leaves rather than spraying. <br /> Sinkholes have formed. Consult with a professional engineer to identify <br /> the source of the problem and complete the <br /> necessary repairs. <br /> The Outlet Device Clogging has occurred. Clean out the outlet device.Dispose of the <br /> sediment off-site. <br /> The outlet device is damaged. Repair or replace the outlet device. <br /> Page 5 of 6 <br />