We have a 10yd dumpster with lots of spent coffee grounds in it.
It is collected and dumped every Tuesday so we would be in short supply on Tuesdays and Wednesdays, but every other day is generally a safe day to come and get it.
Bring buckets, shovels and boots to collect yourself.
Available 24/7 at 9151 SE McBrod Ave at dock door 4.
Feel free to contact me if you want confirmation of how much is in there.