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6. The infiltration basin shall be inspected and maintained at least twice a year and after every storm <br /> in which runoff drains through the overflow outlet. Specific items to be inspected shall include: <br /> Signs of differential settlement, cracking, erosion, leakage in the embankments, condition of rip- <br /> rap, sediment accumulation and health of the turf. <br /> 7, Upon construction completion and once the basin is in use, perform inspections after every major <br /> storm for the first few months to ensure it is stabilized and functioning properly. Determine if <br /> clogging and maintenance is required if standing water is in basin for more than 48 hours.A <br /> Professional engineer shall inspect the basin if it becomes clogged or takes longer than 72 hours <br /> to drain. Use underdrain and drain catch basin to drain basin for maintenance. <br /> 8. Handling and disposal of oily substances, debris and sediments removed from the drainage <br /> system components during maintenance shall conform to applicable local, state and federal <br /> requirements. <br /> 9. At leaching systems locations, inspect the system by removing the cover and inspecting the <br /> interior. Measure the depth of standing water and compare to the actual depth of the structure. If <br /> the standing water is greater than half the depth of the structure, the leaching system shall be <br /> cleaned and inspected on a monthly basis.The leaching system is considered in failure when <br /> pooling occurs at the inlet grate at the leaching system and investigation has determined no <br /> apparent clogging or obstructions within the leaching system. To repair this situation, a contractor <br /> shall be hired to install the same size system in an adjacent area to the leaching system in failure, <br /> subject to subsurface soil investigations concerning permeability. The contractor shall connect the <br /> new system to the old failed system with the same size pipe and slope that currently exists. <br /> 10. Hydro-International First Defense unit to be maintained per the attached manufacturers <br /> recommended maintenance requirements <br /> The property owner also acknowledges that no Illicit discharges will existing on site. <br /> Property Owner Acknowledgement of Operations and Maintenance Requirements <br /> Alfieri Tree Care <br /> 7/3/24 <br /> Signature' Date <br /> Ralph Alfieri <br /> PO Box 2719, <br /> Mashpee MA 02649 <br /> Page 2 <br />