As-is your shot looks more like a snapshot, sorry. A little more creativity would have made the photo score higher IMO. Such as adding an element of someone placing recyclables into the dumpster and a different POV. Wish you well in the challenge.
EDIT to ADD: Photographer pm'ed me after the challenge and asked in a kind manner why I felt like this photo looked like a snapshot. I defended my comment and we had a nice dialogue with each other. I have looked at this photo throughout today studying everything and have come to the conclusion that it does NOT warrant being classified as a snapshot.
I apologize if I offended the photograph with my statement. The remainder of my comment I still standby.
Blackbox thank for the PM you sent and hope you accept my apology. You are a good photographer and it was nice speaking with you through PM.