EO 14398 - Independence National Historical Park (INDE)- URBAN TREE PLANTINGS - PARKWIDE Firm-fixed priced purchase order for tree work, (i.e., tree sourcing, transport, planting, pruning, watering, replacements, stump grinding, and all related maintenance work), in accordance with the specifications, spreadsheet and plans stated herein, which includes one (1) base period and three (3) optional periods.