Rating System

LEED BD+C: New Construction, LEED BD+C: New Construction, LEED BD+C: Schools, LEED ID+C: Commercial Interiors, LEED BD+C: Core and Shell

Rating System Version

v2 - LEED 2.2, v2 - LEED 2.2, v2 - Schools 2007, v2 - LEED 2.0, v2 - LEED 2.0

Inquiry

Intent: To properly account for the re-use of removed bedrock.\nBackground: Due to the specific grading on the site, our project required the removal of several tons of bedrock. Rather than ship this large amount of stone off site for land disposal, the site contractor set up an on-site rock crushing facility. The crushed rock was stock piled on site and used as drainage bed material throughout the project. Any crushed rock that was not used in a timely manner was sent to a storage facility (within 5 miles of the site) to be used on site at a later time. In a Credit Ruling dated 4/24/2002, the USGBC ruled that excavated materials - specifically soils and clay - should not be considered Land Clearing Debris so as to not reward "earth-moving". However, in this case, material was not simply moved from one location to another. A manufacturing process was introduced to change the material properties of the stone, producing a viable building material while eliminating the need to send the rock offsite for land disposal.\nProposal: We propose that this process be accounted for in our calculations toward diverting materials from the landfill. We feel that the contractor went above and beyond standard practices to both minimize waste that would have otherwise been sent to the landfill and to reduce the amount of trucking that would have been required to haul the "waste" stone. Please confirm that this is the appropriate accounting method for this process