The project team is seeking clarification for our intended use of on-site excavated rock. During excavation and site work at the project, a large amount of limestone rock was encountered. Instead of disposing of the rock off-site, we are using it on-site. We are breaking up the on-site rock into 12 - 18" pieces for use as rip-rap. This eliminates the need to use virgin quarry rock and reduces the amount of the volume of waste sent to the landfill. We would like to apply the market value of the rip-rap to MR credit 4.1, Recycled Content (pre-consumer). We will use the following formula for our calculations: # of Tons of excavated rock used on site * the local quarry price per ton * 1/2 = $ applied to MRc4.1 Since this approach will use what is typically a waste stream and use it to reduce the demand for off-site materials, it seems to meet the overall intent of the LEED process. If the rock cannot be applied to MRc4.1, is there any other credit that it could be applied to?
The project team is requesting clarification regarding on how to correctly account for rock extracted and used on site. It is good building practice to reuse materials on site and it is standard construction practice to reuse bedrock on the site (crushed or not). The reuse of these materials on site cannot be applied to MRc4 (Recycled Content), however, the value of the rip-rap may be applied to the calculations for MRc5 (Regional Materials), as calculated by the following equation: # of Tons of excavated rock used on site * the local quarry price per ton undelivered = $ applied to MRc5. Applicable Internationally.