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6.1.D. - Page 20 <br /> Exhibit C <br /> IV. Stormwater Treatment Inspection Information: <br /> The principal maintenance objective is to prevent sediment buildup and clogging, which <br /> reduces the pollutant removal efficiency and may lead to bio-retention area failure. <br /> Routine maintenance activities and the frequency at which they should be conducted are <br /> shown in the tables below.The following storm water treatment Inspection information is <br /> provided for the treatment measures listed above: <br /> Table 1 <br /> Routine Inspection and Maintenance Activities for Bio- <br /> Retention Areas <br /> No. Maintenance Task Frequency of Task <br /> I Remove obstructions,debris and trash from bio-retention area Monthly,or as needed after storm <br /> and dispose of properly, events <br /> 2 Inspect bio-retention area for ponded water. If ponded water Monthly,or as needed after storm <br /> does not drain within 2-3 days,till and replace the surface soil events <br /> and replant. <br /> 3 Inspect inlets for channels,soil exposure or other evidence of Monthly,or as needed after storm <br /> erosion.Clear obstructions and remove sediment. events <br /> 4 Remove and replace all dead and diseased vegetation. Twice a year <br /> 5 Maintain vegetation and the irrigation system.Prune and weed Twice a year <br /> to keep bio-retention area neat and orderly in appearance. <br /> Remove and or replace any dead plants. <br /> 6 Check that mulch is at appropriate depth and replenish as Monthly <br /> necessary before wet season begins, <br /> 7 Inspect the energy dissipation at the inlet to insure it is Annually,before the wet season <br /> functioning adequately,and that there is no scour of the begins <br /> surface mulch. <br /> 8 Inspect bin-retention area using the attached inspection Monthly,or after large storm <br /> checklist, events,and after removal of <br /> accumulated debris or material <br /> J <br /> Table 2 <br /> Catch Basins <br /> No. Maintenance Task Frequency of Task <br /> i Inspect for trash and sediment. Semi-annually(begin and end of <br /> rainy season) <br /> 2 Inspect for standing water. Semi-annually(begin and end of <br /> rainy season) <br /> Page 5 of 6 <br /> ATTYIAGR12015.238/1771-1775 E.BAYSHORE STMMA <br /> REV:10-21-15 VR <br />