1500 INDUSTRY ST 2018-01-01 MF Import

.4PPENDIX A MAINTENpNCE STANDARDS FOR PRIVqTELy b1p�NT,q�NED DRAINAGE FACILI7IES C. Wetponds Malntenance Delect Contlftion Wben Malntenance is Needed Results Expected Wnen � Component � � Maintenanee is PeMormed � Wetpond - � Vegetation Vegeta6on such az grass arW weeds need to ba Vegeta6on should be mowed to mowed when A starts to impede aesfheGcs of pond. 4 to 5 incF�es in height. Trees A9owing is generally required when height exceeds and bushes should be rertaved 18-inches.Mowed vegeta0on should be removed where they are interterinq rrith Irom areas where it could enter ihe pond,eittier pond maintenance activities. when Ihe pond level rises,or by rainfall runofl. Trash and Debris Accumulation that exceeds 1 CF per 1000-SF ot Tra,h and debris rertaved Irom pond area. pond. InIeV Ou�lel Pipe InIeV OWef pipe clogged with sediment and/or No Gogging or blockage in the debns malerial. inlet arM outlet in V�P 9• Sedinen� Sediment accumulations in pond bottom ihat Removal of sediment hom pond Accumula�ion in Pond exceeds the depth ol sediment zone plus Ginches, botlom. &iflom usually ihe first cell. Oil Sheen on Water Prevaient and visible oil sheen. Rertaval of sediment from pond bottom. Erosion Erosion of ihe pond's side slopes and/or scouring of Slopes shoultl be stabilized by the pond botlom,that exceeds 6•indies,or vfiere using proper erosion control continued erosion Is prevalent. measures,and repair methods. Settlement of Pond My part of ihese comppnants ihat has settled 4- Cike/berm is repaired to Dikel Berm inches or lower ihan ihe design elevation,or specifica6ons. inspector detertnines dike/berm is unsound. Rock Window Rock window is clogged wiih sedimenl Window is free of sediment and debris. ( Ovedlow Spiliway Rock is missing and soii is exposed at top ol Replace rocks to specifications. �� spiliway or outside slope. n ! � � 9/1/98 1998 Surface 1Vater Design M al A-12 33