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Contractor treated the tree then Contractor shall be responsible for the cost of treatment to restore the tree to a healthy condition or replace the tree. The latest American Shade Tree Conference guidelines for value determination will determine the value of the trees lost. By entering into agreement with the City the Contractor acknowledges that they accept the condition of each tree and should a tree go into decline or expire, the Contractor agrees to replace the tree with like species and size or agree that the City shall withhold payment equal to the value of the tree. 6.0 Weeds, Disease and Pest Control —All Areas Agricultural pest control services shall be performed by a state licensed/certified agricultural pest control sub -contractor or employee. The Contractor shall notify the Director's Representative via email a minimum of 48 hours in advance of any pesticide applications. The required information shall be the name of the company performing the application, the proposed pesticides to be applied listing the manufacturer/name of the pesticide, the rate(s) of application, the reentry period and the method of application. Furthermore, the Contractor shall copy the email to the Agricultural Commissioner's Office, thereby, notifying their Inspectors of your sub -contractor's or QAUQAC intent to apply pesticides. Furthermore, Contractor's sub -contractor or QAL/QAC shall post on A -frame barricades plastic sealed 18"x24" at minimum 300' intervals (where applicable) public notification posters listing the company performing the application, the proposed pesticides to be applied listing the manufacturer/name of the pesticide, the rate(s) of application, the reentry period and the method of application. 6.1 Weed Control All hardscape and landscape areas shall be kept free of weeds at all times. Weeds shall be removed by hand and/or approved mechanical or chemical methods. The Director's Representative may dispatch City staff or other contractor's to remove/eradicate weeds that reach two (2) inches or greater or when weeds exist in turf areas and are not removed/eradicated immediately. In such instance, the cost will be deducted from the Contractor's monthly invoice. Contractor, in accordance with the Agronomic Plan — Pre -Emergent may apply Dimension and Gallery to all turf areas (except sport(priority fields due for renovation within twelve weeks) and Snapshot two times per year minimum to all groundcover/shrub areas. Note that when applying Snapshot Contractor shall take precaution not to overlap the application on to adjacent turf. Should damage occur to adjacent turf, the Contractor shall remove the damaged turf and replace the affected area with Greg Norman 1 Hybrid Bermuda thick cut sod to the satisfaction of the Director's Representative. Beginning in April all turf shall be sprayed/applied with post -emergent herbicides Revolver (16-17 oz/acre), Speedzone non-ionic surfactant and ferrous oxide pre -mixed in a tank, per the agronomic pre -emergent plan. All applications shall be applied by a state licensed Qualified Applicator sub -contractor or QAL/QAC using a calibrated boom sprayer with appropriate nozzles. Following the initial application of post -emergent City of Santa Ana RFP 16-063 Page 20 25K-20