8525 EVERGREEN WAY BURGER KING 2021-05-10

No. 21 (continued)-Maintenance Standards and Procedures for Bioretention Facilities. Maintenance Recommended Frequency, Condition when Maintenance is Needed Action Needed Component Inspection Routine (Standards) (Procedures) Maintenance Vegetation(cont'd) Trees and shrubs Fall and Planting beneath mature trees •When working around and below mature trees,follow the most current ANSI A300 standards and ISA BMPs to the extent (cont'd) Spring practicable(e.g.,take care to minimize any damage to tree roots and avoid compaction of soil). •Planting of small shrubs or groundcovers beneath mature trees may be desirable In some cases;such plantings should use mainly plants that come as bulbs,bare root or in 4-inch pots;plants should be in no larger than 1-gallon containers. Fall and Presence of or need for stakes and guys(tree growth, •Verify location of facility liners and underdrain(if any)prior to stake installation in order to prevent liner puncture or pipe Spring maturation,and support needs) damage •Monitor tree support systems:Repair and adjust as needed to provide support and prevent damage to tree. •Remove tree supports(stakes,guys,etc.)after one growing season or maximum of 1 year. •Backfill stake holes after removal. Trees and shrubs A Vegetation causes some visibility(line of sight)or driver •Maintain appropriate height for sight clearance adjacent to vehicle safety issues •When continued,regular pruning(more than one time/growing season)is required to maintain visual sight lines for safety or travel areas(or clearance along a walk or drive,consider relocating the plant to a more appropriate location. areas where visibility •Remove or transplant if continual safety hazard needs to be •Consultation with a landscape architect is recommended for removal,transplant,or substitution of plants maintained) Flowering plants A Dead or spent flowers present Remove spent flowers(deadhead) Perennials Fall Spent plants Cut back dying or dead and fallen foliage and stems Emergent vegetation Spring Vegetation compromises conveyance • Hand rake sedges and rushes with a small rake or fingers to remove dead foliage before new growth emerges in spring or earlier only if the foliage Is blocking water flow(sedges and rushes do not respond well to pruning) Ornamental grasses Winter and Spring Dead material from previous year's growing cycle or dead • Leave dry foliage for winter interest (perennial) collapsed foliage •Hand rake with a small rake or fingers to remove dead foliage back to within several inches from the soil before new growth emerges in spring or earlier if the foliage collapses and is blocking water flow Ornamental grasses Fall and Spring Dead growth present in spring • Hand rake with a small rake or fingers to remove dead growth before new growth emerges in spring (evergreen) •Clean,rake,and comb grasses when they become too tall •Cut back to ground or thin every 2-3 years as needed Noxious weeds M Listed noxious vegetation is present(refer to current •By law,class A&B noxious weeds must be removed,bagged and disposed as garbage immediately (March-October, county noxious weed list) •Reasonable attempts must be made to remove and dispose of class C noxious weeds preceding seed •It is strongly encouraged that herbicides and pesticides not be used in order to protect water quality;use of herbicides and dispersal) pesticides may be prohibited in some jurisdictions •Apply mulch after weed removal(see"Mulch") , 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 Volume V-Runoff Treatment BMPs-December 2014 4-57