Laserfiche WebLink
Table V-4.5.2(21) Maintenance Standards - Bioretention Facilities <br /> (continued) <br /> Recommended Fre- Condition <br /> when Main <br /> uenc <br /> Maintenance q Y a Action Needed (Pro- <br /> tenance is <br /> Component Routine Main- cedures) <br /> Inspection Needed (Stand- <br /> tenance ards) <br /> west Plant Disease <br /> Management Hand- <br /> book for information <br /> on disease recog- <br /> nition and for addi- <br /> tional resources <br /> . Replant as neces- <br /> sary according to <br /> recommendations <br /> provided for"facility <br /> bottom area and <br /> upland slope veget- <br /> ation". <br /> . Prune trees and <br /> shrubs in a manner <br /> appropriate for each <br /> species. Pruning <br /> should be performed <br /> by landscape pro- <br /> All pruning fessionals familiar <br /> seasons (tim- Pruning as <br /> with proper pruning <br /> ing varies by needed <br /> techniques <br /> species) <br /> Trees and • All pruning of mature <br /> shrubs trees should be per- <br /> formed by or under <br /> the direct guidance <br /> of an ISA certified <br /> arborist <br /> Large trees and • Prune trees and <br /> shrubs interfere shrubs using most <br /> A with operation of current ANSI A300 <br /> the facility or standards and ISA <br /> access for main- BMPs. <br /> tenance • Remove trees and <br /> 2014 Stormwater Management Manual for Western Washington <br /> Volume V- Chapter 4 -Page 872 <br />