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A. Minimum plant specifications.

1. All required trees shall be at least 2" in caliper and shrubs at least 1 gallon.

2. Trees shall optimize tree diversity; include native species and at last 60% conifers; utilize insect and disease resistant trees unless determined by the Planning Official as not appropriate for the site conditions.

3. Trees, shrubs, perennials, perennial grasses, and groundcovers shall be located and spaced to accommodate their mature size on the site.

B. Soils, soil conditioning and mulching.

1. A minimum of 12" depth of non-mechanically compacted soil shall be available for water absorption and root growth in planted areas.

2. A minimum of a 4" layer of porous mulch shall be applied to all exposed soil surfaces of nonturf areas within the landscape area. Plant types that are intolerant of mulch shall be exempt from this requirement. Non-porous material, such as plastic sheeting, shall not be placed under the mulch. However, porous landscape fabric is permitted.

3. Areas that have been cleared, graded, or compacted and that have not been covered by impervious surface, incorporated into a drainage facility or engineered as structural fill or slope shall be amended with organic matter. (Ord. M-4179 § 92, 2016; Ord. M-3643, 2004)