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SECTION XI <br />WEED CONTROL <br />A. General Specifications <br />A weed is defined as any plant growing in an area where it interferes with the intent and expectation <br />of the landscape. The City expects all areas to have minimum weed populations due to the frequency <br />of management intervals. <br />1. All weed control material shall be approved by CR prior to using. <br />2. All weeds shall be addressed, as indicated, in the frequency of management intervals. The <br />Specifications, in general, indicate monthly weed control with a specified herbicide; <br />however, if required to alter the existing intervals for certain areas for higher quality Holi <br />cultural outcomes (e.g. parking lots, planters, sidewalks, etc.) <br />3. Weed heights of four (4) inches or greater are an indication of improper weed control <br />treatment and/or intervals. Weedy areas will be brought to the attention of Contractor in <br />order to gauge the reason for the deficiency. Remediation of the problem, if deemed a <br />Contract deficiency, shall be within five (5) working days. <br />4. String trimming, in the absence of chemical treatment, may be used to control a weed <br />population, but satisfactory weed control is measured by both results and the visual <br />aesthetic of the planted area. <br />5. Manual weed control may be substituted for chemical weed control in some instances to <br />maintain the proper interval (e.g. windy or rainy conditions which prevent chemical <br />treatment). <br />6. Damage to plants caused by weed competition and herbicide application shall result in <br />replacement plantings at Contractor's expense. <br />B. Weed Control of Hard Surfaces <br />Contractor shall apply an approved herbicide, in the prescribed interval, to remove and control weeds <br />growing in cracks, expansion joints, patios, gutters (cementlasphalt interface), interior park roads, <br />hardscapes, and other contiguous City landscape-hardscape interfaces, in order to maintain the <br />landscape aesthetic. <br />1. Areas adjacent to paved surfaces shall have minimum margins of relief provided by <br />chemical weed control. <br />a. Systemic, non -selective weed control of adjacent roadside lawns shall not have in <br />excess of twelve (12) inches of bare soil between the lawn and roadway edge. <br />b. Overspray or excessively bare margins shall require replacement plants to be <br />installed. <br />C. Weed Abatement of Fallow or Undeveloped Lands <br />Contractor shall periodically mow unwanted weeds in open space areas, wild areas, and undeveloped <br />portions of City landscapes and vacant City lots. <br />1. Contractor shall perform weed abatement processes, which maintain the weed population <br />below eight (8) inches, when required throughout the year, but not to exceed four (4) times <br />annually. <br />2. Any additional frequencies or areas will be paid for as Additional Extra Work (AEW). <br />RFP 23-151 Landscape Maintenance Services Page 63 of 136 <br />