Date
Inquiry

Intent: To properly account for the re-use of removed bedrock.Background: 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.Proposal: 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

Ruling

While it is good building practice to reuse materials on site, reprocessed rock cannot be counted in the construction waste management calculations. It is standard construction practice to reuse bedrock on the site as fill (crushed or not). In addition, this ruling is conceptually consistent with the Reference Guide\'s definition of CDL debris. Please note that you can include this material in MRc5 calculations, counting it as local harvesting and manufacture of aggregate. Applicable Internationally.

Internationally Applicable
On
Campus Applicable
Off