215 DORN AVE 2022-01-24 - Laserfiche WebLink

Table V-4.5.2(21) Maintenance Standards - Bioretention Facilities (continued) Recommended Fre- Condition uenc when mein. Maintenance q y a Action Needed (Pro- tenance is Component Routine Main- cedures) Inspection Needed (Stand- tenance ards) up pet waste. . Reduce hiding places for pests by removing diseased Every site Signs of pests, and dead plants visit asso- such as wilting leaves, chewed • For infestations, fol- Insect pests ciated with leaves and bark, low IPM protocols vegetation spotting or (see "Additional management other indicators Maintenance Resources" section for more information on IPM protocols) Note that the inspection and routine maintenance frequencies listed above are recom- mended by Ecology.They do not supersede or replace the municipal stormwater permit requirements for inspection frequency required of municipal stormwater permittees for "stomiwater treatment and flow control BMPs/facilities". a Frequency: A =Annually; B = Biannually (twice per year); M = Monthly; W=At least one visit should occur during the wet season (for debris/clog related maintenance, this inspection/maintenance visit should occur in the early fall, after deciduous trees have lost their leaves); S = Perform inspections after major storm events (24-hour storm event with a 10-year or greater recurrence interval). IPM- Integrated Pest Management ISA - International Society of Arboriculture Table V-4.5.2(22) Maintenance Standards - Permeable Pavement Recommended Fre- Condition quency a when Main- Component tenance is Action Needed (Procedures) Inspection Routine Needed Maintenance (Standards) Surface/Wearing Course Permeable IA, S I (Runoff from I . Clean deposited soil or 2014 Stormwater Management Manual for Western Washington Volume V- Chapter 4 -Page 887