Amend Construction Standards and Specifications - Section 8, Landscaping, Section 9, Fixtures and Finishes, per Resolution No. 31-2018

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SECTION 8 — LANDSCAPING 8-2.7 STRUCTURAL SOIL Structural Soil shall provide a layer suitable for supporting the growth of permanent vegetation. All materials shall be obtained from the existing soils within the construction limits, an approved commercial source, or project -specific borrow pits. The Structural Soil shall be a fertile, friable and loamy soil of uniform quality free from any objectionable plant material or undesirable vegetative debris which would be harmful to plant life. All landscape shrub beds and tree pits within paved areas shall be backfilled with a Structural Soil mix as further described below. • All materials used to develop the Structural Soil shall consist of 40-45% sand, 7-20% clay, and 35-40% silt and must be placed at the depth of the tree root ball at a minimum depth of 24 inches. • All components and amendments to the Structural Soil shall be added and mixed with pulverized topsoil and prepared offsite at the supplier's facility creating a uniform mix. Structural Soil shall be installed uniformly in grassed parkway locations and urban environments as may be necessary for the viability of trees and other landscape amenities. Structural Fill shall be stored in stockpiles at the producer's or supplier's facility and be protected from erosion, absorption of excess water, and contamination at all times. 8-2.8 TREE GRATES The size and location of Tree Grates shall be in accordance with the tree species size classes listed in the tii t,' Lee i ;as t.er V!J a.n1t.'!M,u;;,ist. and ct 2il 2 „L)... All tree grates shall be installed with a metal frame, such as angle iron, on which the grate will rest. At all tree grate locations, a water percolation test shall be conducted to ensure not standing water is present within planting beds for greater than 12 hours. If proper drainage cannot be achieved, underdrains are to be provided where standing water will restrict healthy plant growth. 8-3 MAINTENANCE AND WARRANTY All vegetative features, where applied, shall be warranted for a period not less than 2 growing seasons from project completion. During the warranty inspection period, planting areas will be rated per the following scale: Good: 81-100% of foliage, no major structural defects, no insect or disease concern, high vigor Fair: 66-80% of foliage, minor structural defects, minor insect or disease concern, medium vigor Poor: 26-65% of foliage, major structural defects, mechanical damage, insect or disease noticeable decline, poor vigor— remediation plan and action required Dead: 0-25% of foliage— replacement required Areas rated as "poor" will require a remediation plan and action. Areas rated as "dead" will require replacement. 95