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64. All trees used in landscaping be a minimum of fifteen (15) gallons in size and all shrubs a minimum of five (5) gallons, unless otherwise shown on the approved landscape plan. 65. The project developer shall provide root control barriers and four inch perforated pipes for parking lot trees, street trees, and trees in planting areas less than ten feet in width, as determined necessary by the Director of Community Development at the time of review of the final landscape plans. 66. The following statements shall be printed on the site, grading, and landscape plans where applicable to the satisfaction of the Director of Community Development prior to issuance of a building permit: a. No existing tree may be trimmed or pruned without prior approval by the Director of Community Development. b. No equipment may be stored within or beneath the driplines of the existing trees to be saved. c. No oil, gasoline, chemicals, or other harmful materials shall be deposited or disposed within the dripline of the trees or in drainage channels, swales, or areas that may lead to the dripline. d. No stockpiling/storage of fill, etc., shall take place underneath or within five feet of the dripline of the existing trees. 67. The applicant/project developer shall install an automatic irrigation system for all landscaping, including the landscaping installed in the City right-of-way. The site irrigation design shall utilize low-volume drip, bubbler, or other water conserving irrigation systems to maximize water conservation to the greatest extent possible. The irrigation systems shall include a soil moisture, rain sensor, or other irrigation efficiency device. The proposed type of irrigation efficiency device shall be shown on the plans submitted for the issuance of building permits. Building and Safety Division 68. All retaining walls higher than four feet from the top of the wall to the bottom of the footway shall be constructed of reinforced concrete, masonry, or other material as approved by the Director of Community Development, or shall be an approved crib wall type. Calculations signed by a registered civil engineer shall accompany the wall plans. 69. At the time of building permit plan submittal, the project developer shall submit a final grading and drainage plan prepared by a licensed civil engineer depicting all final grades and on-site drainage control measures to prevent stormwater runoff onto adjoining properties. 70. Prior to issuance of building permits, the applicant/developer shall submit a waste management plan to the Building and Safety Division. The plan shall include the estimated Case No. PUD— 112/1027 Rose Avenue Planning Commission Page 11