@troshalom I know this is a bug because in a game I played in Newcrest. I made a generic dumpster lot next door to my sim's lot. I didn't have to hang out at the generic lot to collect from the dumpsters, I just traveled to the lot after two sim days. I was able to collect from the dumpsters and didn't have to put trash in them to dive or sort for componets, etc.
Eta. The non build able parts in the neighborhoods need both the recycle and landfill traits to rummage in the trash bins.