Revise the 3rd paragraph to read as:
"If actual weight cannot be measured, the waste quantity may be converted to weight using an appropriate volume to weight conversion factor. Facility-specific or regional conversion factors may be available. The EPA also publishes volume to weight conversion factors (see their document Volume-to-weight conversion factors for solid waste). Waste quantity estimates based on the amount of waste in the waste container must take into account how full the container is (as opposed to assuming the waste container is full).
If the project shares waste collection with other buildings or spaces, pro-rating based on total number of occupants or other appropriate methodology (e.g. space type or square footage) is acceptable."