Jun 1 2015 consistent 20year life cycle cost analysis of gravity sewers lift stations and lowpressure sewer systems For further details The worksheet model considers four different future cost components Future construction costs to replace Grinder Pump Station Basins The salvage value of the items above is Jun 1 2015 consistent 20year life cycle cost analysis of gravity sewers lift stations and lowpressure sewer systems For further details The worksheet model considers four different future cost components Future construction costs to replace Grinder Pump Station Basins The salvage value of the items above is