Your comment in "Bird's Eye View" above states:
"Buildings with large numbers of identical rooms with separate ventilation zones—such as hotel rooms or apartment units—have been allowed to perform random sampling as an alternative approach in situations when the delivery of outside air—on an air-change-per-hour basis—and the materials in a ventilation zone are identical. Project teams should confirm with GBCI that this is still applicable in LEED 2009."
If our condo has 5 different unit "types", is it feasable to only sample 1 of each unit type? not exactly sure what "random" means.