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Florida Erosion and Sediment Control Inspector's Manual <br /> .r <br /> Horizontal Wells <br /> This system also consists of a series of ditches leading to a sump hole or pump . The <br /> ditches are filled with sand or gravel surrounding a perforated pipe. A geotextile may also <br /> be used to prevent excessive migration of fines into the system . The discharged water <br /> must be treated before release as described above . <br /> Well-point Systems ., <br /> The well-point system is the preferred system for dewatering and should be used whenever <br /> possible . The initial discharge yields the sediments displaced by the installation of the r <br /> small collector pipes. This can be directed into the excavation , a small settling or filtration <br /> facility , or larger temporary impoundment. Thereafter the water is generally clear ground <br /> water and may be discharged into a receiving water body provided that there is suitable <br /> conveyance . <br /> Maintenance <br /> 1 . Any water impoundment must be inspected daily to prevent failure of dikes , berms , <br /> or control structures . Minor problems should be repaired at once . Major problems <br /> will require a redesign and plan modification . <br /> 2 . Any filtration device must be inspected and cleaned frequently . The discharge <br /> should be monitored daily and whenever the pumps are started . Inspection and <br /> maintenance of the system are best performed when the facility is dry. The first <br /> signs of diminished performance should be an alarm that maintenance is required . <br /> If the facility will no longer drain itself, the untreated water must be pumped back to <br /> its source, rather than by-passing the facility and discharging to the water body or <br /> stormwater system . _ <br /> 3 . Floating turbidity barriers shall be maintained as per FLOATING TURBIDITY <br /> BARRIER - Section 4 .45 <br /> M <br /> 4-114 ' <br />