Walk around and also pull up construction permits. Many cases of cheap/lazy contractors that don't want to pay or manage dumpsters. They steal cans, throw construction debris in there, then leave it out on the next block or so or just take it out of the area and dump it in an abandoned lot.

You need to have distinctive borings/paint on your can and also lock it up when not trash day and even direct cameras at it.

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Let your ANC Commissioner know and maybe there's a pattern of same persons.