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soils, which are commonplace in the urban <br />environment. <br />Root Pruning <br />Detail 824 <br />2” dia. And larger roots within 8’ of <br />trunk must be approved by the <br />construction inspector for grinding <br />or removal. <br />Replace “Construction Inspector” with “Certified <br />Arborist" <br />Tree Protection <br />Detail 829 <br />Tree Protection Zone (TPZ) Consider adding specifications for a TPZ which <br />should be at least 1.5 inches wide per every inch <br />DSH, rather than just having the protected area be <br />equal to the dripline of the tree. <br />Height of TPZ fencing Consider adding specifications that the TPZ fencing <br />must be four to six feet tall. <br />5” of Mulch Generally, mulch is only required when a protective <br />fence cannot be installed around the tree. Consider <br />adding a note that the mulch should be reduced to 2 <br />to 4 inches after the completion of the project <br />Inspection and monitoring Consider adding a requirement for an ISA Certified <br />Arborist to be present on site to inspect and monitor <br />trees that are impacted during construction, <br />maintenance, or renovation activities. <br /> <br /> <br />Recommended additional Standard Details: <br />▪ Nursery Stock Standards <br />▪ Spacing Guidelines <br />▪ Young tree establishment <br />▪ Pruning guidelines <br /> <br />See Appendix J: Arboriculture BMPs