PB 22 10 Altera 769 LLC Filed Application with Exhibits Final Site Plan Phase 2

Estimated Maintenance Costs An estimated total cost of approximately $6,200 will be incurred to maintain the proposed stormwater management system on an annual basis. The following is a summary of the required maintenance tasks and associated costs in written and tabular form: Maintenance Schedule Summary Task Identification Task Frequency Estimated Cost Annual Cost Inspection by licensed professional consulting Once (1) per year $1,500.00 $1,500.00 engineer Once (1) per month Inspection by property (or after a storm event owner and/or Minimal Cost Minimal Cost exceeding 1 inch of maintenance designee rainfall) Debris removal from conveyance system (inlets, pipes, manholes, Twice (2) per year $1,750.00 $3,500.00 and outlet control systems) Surface debris removal (garbage & organic Twice (2) per month matter) including leaves $50.00 $1,200.00 (or on as-needed basis) in the Fall and snow in the Winter • Inspections to be performed by a consulting engineer on an annual basis. • Inspections to be performed by the property owner and/or a maintenance designee on a monthly basis and/or after a storm event exceeding 1 inch of rainfall • Stormwater conveyance system and outlet control structure access for debris removal to be performed on an annual basis and/or as inspection routine dictates. • Surface debris removal including garbage and organic matter to be performed in conjunction with lawn and grounds maintenance, includes removal of leaves in the Fall and removal of excessive amounts of snow (as necessary) in the Winter. These tasks are encouraged as necessary to maintain safe operating conditions (twice a month from Spring through Winter recommended or on as-needed basis)