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A. Building Design Standards.

1. The entire site complex shall have a unity of design by use of similar wall and roof materials, roof slopes and window patterns, in order to reduce adverse visual impacts to those on and along major access routes and to mitigate adverse impacts from major access routes on nearby, less intensive uses.

2. Rooftop equipment shall be visually screened pursuant to LUC 20.20.525. The design and color of rooftop mechanical screening should be integrated with the building architectural style.

3. The building should include architectural elements that provide weather protection such as overhangs and recesses at building entrances.

B. Landscaping Design Standards.

1. The provisions of LUC 20.20.520, Tree Preservation and Landscape Development, except as they conflict with this section, shall apply to development in the OLB-OS District, except that the minimum depth of landscaping set forth in LUC 20.20.520.F.1 may be reduced to be consistent with any reduction to required minimum yards allowed pursuant to this section. The required landscaping Type in LUC 20.20.520.F.1 may be modified to ensure that required landscaping provides sufficient screening within the reduced minimum yard area.

2. Service yards and at-grade mechanical equipment shall be sight-screened from adjoining property or streets or highway by a solid planting of evergreen trees and shrubs at least as high as the equipment or use being screened within two years from the time of planting.

3. Parking areas shall include plantings using trees of three inches caliper or 14 to 16 feet high and 42-inch high shrubs at approximately 35 feet on-center parallel to the aisle, or shall be screened as a service yard using similar materials. Other parking lot landscaping shall meet LUC 20.20.590 requirements for Type V landscaping.

4. When property abuts the right-of-way for I-90, I-405, or SR 520 highways, or abuts parallel frontage roads of said highways, plant material shall be planted and spaced in a planting area a minimum of 10 feet wide. Deciduous trees shall have a minimum caliper of three inches, evergreen trees shall have a minimum height of 14 to 16 feet tall and shall be at intervals of no greater than 35 feet on center along the right-of-way. No more than 30 percent of the trees shall be deciduous. Trees shall have a minimum mature height of 45 feet. Shrubs shall be a minimum of 42 inches high.

5. Trees installed as part of general site landscaping shall be a minimum of one and one-half inches in caliper or eight to 12 feet high.

6. Accessible outdoor gathering areas should be provided for the employees, general public and visitors to the site.

C. Design Review Required. All development activity within Development Area of the OLB-OS District must be reviewed by the Director of the Development Services Department using the Design Review Process, Part 20.30F LUC. (Ord. 5403, 8-5-02, § 11)