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SECTION 3:TREE SYSTEM MONITORING METHODOLOGY <br /> f 3.2 Site Maintenance <br /> Site maintenance is being performed during the 3-year plant establishment period as <br /> described in the Phytoremediation Cleanup Plan. Weed control or supplemental watering may <br /> also be required beyond the plant-establishment period,but this will be determined on an <br /> as-needed basis. Maintenance activities performed to date include: <br /> Replacement of trees damaged by beavers <br /> ' • Irrigation of planted trees <br /> Irrigation system inspection checks <br /> • Periodic irrigation system repairs and maintenance <br /> ' • Weed control within planting basins and within the planting area <br /> Maintenance of the watering basins and mulch <br /> Other plant replacement (as needed) <br /> t <br /> t <br /> ' SAC11667491PANAGON(YEAR3_2009_HOLTTREE_MONITORING_REPORT.DOC) 33 <br />