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• If the pipe slope drain is conveying sediment -laden water, direct all <br />flows into the sediment trapping facility. <br />• Materials specifications for any permanent piped system shall be set <br />by the local government. <br />Maintenance Check inlet and outlet points regularly, especially after storms. <br />Standards The inlet should be free of undercutting, and no water should be going <br />around the point of entry. If there are problems, the headwall should be <br />reinforced with compacted earth or sand bags. <br />• The outlet point should be free of erosion and installed with <br />appropriate outlet protection. <br />• For permanent installations, inspect pipe periodically for vandalism and <br />physical distress such as slides and wind -throw. <br />• Normally the pipe slope is so steep that clogging is not a problem with <br />smooth wall pipe, however, debris may become lodged in the pipe. <br />Dike material compacted <br />90% modified proctor '1 <br />CPEP or equivalent pipe <br />Discharge to a stabilized <br />watercourse, sediment retention <br />facility, or stabilized outlet <br />-III-1I l_lI1-11 <br />1 <br />Interceptor Dike <br />E-1= <br />MIN. <br />Provide riprap pad <br />or equivalent energy <br />dissipation <br />efastenedtogether <br />Inlet ust be <br />secuther <br />with gasketed watertight fittings <br />Figure 4.2.4 — Pipe Slope Drain <br />• <br />C7 <br />Volume II — Construction Stormwater Pollution Prevention - August 2012 <br />4-68 <br />