1. Provide yearly data on the weights of all waste streams collected. Some streams will have weights provided from haulers, while others will need to be approximated using number of pick-ups (schedules), the volume of the bins (cubic yards) and fill-level data if available
2. The diversion rate must be based on 12 months of data. Data cannot be older than the past three (3) years.
3. If available, include weights of tenant-managed bins. Indicate if weights are approximated or actual
4. Calculate waste diversion as follows: [A / (A+B)] x 100

   A = Annual weight of all materials currently diverted from disposal

   B = Annual weight of all materials currently sent for disposal (includes landfill, incineration and EFW)
5. Express the annual weight in metric tonnes or kilograms.

If waste audits were not conducted during Covid, reference the last Waste Audit that was completed before Covid.

Calculating a yearly diversion number from yearly pick-up data is considered the preferred method over the Waste Audit diversion number. Where weights are provided by haulers, these can be submitted and indicated as real weights. Where the number of hauls and bin sizes per stream are available only, these will be converted to weights using EPA densities and assuming full bins (unless reliable fill-level data can be provided).

For density of material, the EPA provides standard densities for each material type which is the current highest standard in the industry: https://www.epa.gov/smm/volume-weight-conversion-factors-solid-waste to convert volume to weight