Have not done a volume test with a bucket/barrel, yet. It's coming. I've promised myself (and my wife) that I get all the projects that have been started off the list before making new ones. Vacation time too. Anyway. I've been running time tests as well. Non raining/wet times (theoretical) have been between 11k and 16k gal per day. Like I stated before, this is really next years project so I intend to take data before making a decision on what to do and how to do it. I will post the spreadsheet numbers when I get more data (and will show the calcs). Also, theoretical shows 140 or so gallons pumped every cycle, so I'll need more than a barrel or I'll need to be sure to be ready for overflow. I've been on the lookout for 4-5ft section of culvert to do a shallow well test. This would be to see if I can prevent water from reaching the house (which I never will entirely due to ground water). It may all be ground water. I will report back for sure.