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Table V-4.5.2(21) Maintenance Standards - Bioretention Facilities <br /> (continued) <br /> Recommended Fre- Condition <br /> uenc when Main <br /> Maintenance q Y a Action Needed (Pro- <br /> tenance is <br /> Component Routine Main- ceduree) <br /> Inspection Needed (Stand- <br /> tenance ards) <br /> is forecasted <br /> PA ag d is dam- Repair/replace <br /> W Pipe is clogged Remove roots or debris <br /> . Clear the blockage <br /> Sediment, . Identify the source of <br /> debris, trash, or <br /> A, S mulch reducing the blockage and <br /> capacity of take actions to pre- <br /> inlet/outlet vent future block- <br /> ages <br /> Accumulated Clear leaves (particularly <br /> Weekly during leaves at important for key inlets <br /> Pipe inlet/out- fall leaf drop inlets/outlets and low points along long, <br /> let linear facilities) <br /> . Clear vegetation <br /> (transplant veget- <br /> ation when possible) <br /> within 1 foot of inlets <br /> and outlets, maintain <br /> A Maintain access access pathways <br /> for inspections . Consultation with a <br /> landscape architect <br /> is recommended for <br /> removal, transplant, <br /> or substitution of <br /> plants <br /> Maintain a cover of rock or <br /> cobbles or other erosion <br /> Concentrated protection measure (e.g., <br /> Erosion con- A flows are caus- matting)to protect the <br /> trol at inlet <br /> ing erosion ground where con- <br /> centrated water enters the <br /> facility(e.g., a pipe, curb <br /> 2014 Stormwater Management Manual for Western Washington <br /> Volume V- Chapter 4 -Page 869 <br />