Both wheat and chaff are characteristic of every member. The judgement of which John the Baptizer speaks is often understood to be the judgement where the good people are separated from the bad. But the judgement can also be understood as applying to each person. Every one of you has some wheat-like characteristics which are fruitful and nourishing for others around you. But every one of you also has some chaff-like characteristics which choke and impede your life and the life of your neighbor without being of any benefit whatever to anyone.
Every person is a field, so to speak, in which both wheat and chaff are found in abundance.
We misunderstand judgement if we see it only as that occasion when God declares us right and everybody else wrong. If we regard judgement only as the punishing of the wicked, we have no hope, for deep in our heart we know the wickedness that lurks within us. But if we see judgement as that time when God separates in each of us the wheat from the chaff, then we have something to look forward to. We have hope that cannot be destroyed. The printed instructions from the City of Houston seemed to indicate to me that I should separate the recyclable materials into their different categories before I put them at the curb.