Sensitivity Analysis

 The previous results show the influence of both material salvaging for reuse and

transportation to a storage warehouse on the environmental and health impacts of each

scenario compared. Other variables tested for their influence on impacts were time for

deconstruction or demolition activities, driving distance carpoolingg), degree of recycling,

transport distance of equipment, and time for material preparation.

Time for Deconstruction or Demolition Activities

 The importance of the pace of dismantling and demolishing the barrack by each of

the four scenarios on the environmental and health impacts was determined by increasing

and decreasing the baseline rates achieved. Baseline rates of dismantling achieved by the

deconstruction team were 105.5, 182.4, 231.7, and 388.4 lbs/hr for 100%, 44%, 26%

manual deconstruction and 100% mechanical demolition, respectively. The demolition

rates achieved were 1028.5, 608.2, 729.3, and 600.1 lb/hr for the 100%, 44%, 26%

manual deconstruction and 100% mechanical demolition scenarios, respectively. These

rates were found by dividing the lbs of material salvaged and landfilled by the labor

hours minus the machine hours and machine hours respectively.

 The rate of dismantling material for salvage was observed to influence the

emissions much more than the disposal rate because the slower rate of hand demolition

greatly increased the amount of time the workers spent at the site and thus the times

required for driving to work and using the generator. For the scenarios involving manual

deconstruction, decreasing the rate of dismantling by 5 lb/hr increased human toxicity by

21%, acidification by 4%, and eutrophication and ozone depletion by 3%, whereas very

little change in the impacts was observed in the 100% Mechanical scenario because no

salvaging of materials was performed. Increasing the rate of dismantling by 5 lb/hr