Mechanical scenario resulted in materials transferred directly to an on-site dumpster for

subsequent disposal.

 The amount of recycled material was the same for each barrack that used hand

deconstruction (Table 3-2). In 100% mechanical demolition, the building was knocked

down and put in the C&D landfill without removing the recyclable steel. As anticipated,

the yield of salvageable material decreased with diminishing levels of manual labor. The

weight of salvaged material ranged from 2,552 lbs from the barrack that was entirely

mechanically deconstructed to 59,089 lbs from the entirely manually deconstructed

barrack. The barrack that was mechanically deconstructed yielded salvaged material in

the form of large wood columns, the foundation of the building and plumbing and

electrical fixtures. This is a total of 2,552 lbs of salvaged wood, which is 1.8% of the

total weight of the building. Additional components salvaged with manual methods

included non-damaged wood, showers, urinals, toilets, air conditioning ducts, and some

of the bricks from the chimney (if clean of mortar).

 The amount of hazardous material (141 lbs) was the same for each barrack, as each

barrack contained the same components, including primarily mercury thermostat

switches, lead-acid batteries in exit lights and emergency light fixtures, fluorescent tubes

and ballasts. As salvaged material yields increased, the amount of material sent to the

landfill decreased. Therefore, as also anticipated, the amount oflandfilled material

decreased with increasing manual labor rates. The amount of material landfilled ranged

from 140,055 lbs for 100% mechanical demolition to 82,486 lbs for 100% manual

deconstruction.