A power outage occurred at a water distribution pump station. Before the power outage the station was pumping with one pump at 6,000 gpm in a 18" diameter Steel Pipe. The pipe was 1000 feet long with no other connections discharges into a second set of pumps at a second pump station. No surge relief equipment was within either pump station. What was the negative pressure on the first pump station at the time of the power outage?