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6 25 percent of the required number of trees shall be deciduous shade trees, and a minimum of 25 percent shall be coniferous trees. Ornamental trees may be used when applied towards landscaping requirements. However, the number of trees shall not exceed 15 percent of the required amount. 4. Final slopes greater than 3:1 will not be permitted without special treatment such as terracing, retaining walls, erosion control blankets, or special ground covers. 5. All plant materials, except trees planted per the tree replacement schedule, shall meet the following minimum size standards in Table 6-1. Trees planted per the tree replacement schedule shall meet the minimum requirements outlined in LEC 105.12.470(c)(8)d. Table 6-1: Minimum Size Standards for Landscape Materials Plant Type Minimum Size at Planting ** Trees: Evergreen 6 feet in height Deciduous--shade 2.5 inches caliper, measured six inches from base Deciduous--ornamental 2 inches caliper, measured six inches from base Shrubs: Evergreen # five container* Deciduous # five container* Shrubs used for screening (evergreen or deciduous) # five container* * Approximately five gallons. ** See American Standards for Nursery Stock, ANSI 260.1-2004 for exact specifications. * This table and its requirements do not apply to the tree replacement schedule. 6. As an alternative to the minimum standards for landscape materials, a landscape plan prepared by a qualified professional certifying that said plan will meet the intent of this section may be submitted. 7. As a general rule, trees should be planted ten feet away from all utilities including water and sewer stubs unless approved by the city's landscape architect. No plantings may be placed in a drainage and utility easement, unless approved by the Public Works Director, (e) Perimeter parking lot landscaping. Parking areas, and especially vehicle headlights, shall be screened from public streets and sidewalks, public open space, and adjacent residential properties. Where applicable an applicant may demonstrate that distance and/or finished grades would achieve this objective, whereupon this requirement may be waived by the Planning Director Community Development Director. The perimeter of parking areas shall be screened as follows: 1. With the exception of VMX area, a landscaped frontage strip at least eight feet wide shall be provided between parking areas and public streets, sidewalks, or paths road right-of-way. If a parking area contains over 100 spaces, the frontage strip shall be increased to twelve feet in width. a. Within the frontage strip, screening shall consist of either a masonry wall, fence, berm, or hedge or combination that forms a screen a minimum of 3 1/2 and a maximum of four feet in height, and not less than 50 percent opaque on a year-round basis.