LEED v4 Waste Monitoring unit of measurement in Truck Load

Hi Miriam ~Is your waste commingled or does each "truckload" have a single stream? You will need to have the supporting documentation that validates the actual weight or volume measurement and it has to be consistent throughout the entire project.  Do your haul reports simply state "1 truckload?"  

Are you able to get the containment size of the truck to help with a conversion?  I am not sure how USGBC might respond to the tally of the metal, but getting as much information as you can from your hauler that could help with the quantity conversion would be my suggestion.  Then go ahead and do the conversion to get it into the same units as your other waste.  Ultimately, I am not sure if it will be acceptable to GBCI, but capture as much as you can and see how the review comes back.  This situation might warrant a direct conversation with your review team.

We had a similar situation in a recent project and received the below response from GBCI:   As long as the material in the truck hauls is accurately estimated (i.e. you have a record that all hauls are full truckloads which is a set volume of material, etc), the team can then use the LEED or EPA conversion values to convert the waste volume over to weight. Note that it is not allowable to visually estimate the percentages of various materials within commingled loads. Only an actual volume measurement or actual weight measurement is allowable, however it is permissible to then use that measurement to convert from volume to weight or weight to volume using the LEED or EPA conversion values.

The US EPA volume to weight conversion factors report can be found here: https://www.epa.gov/smm/volume-weight-conversion-factors-solid-waste