Environmental Protection Agency Region 9 administrator Jered Blumenfeld likes to see things for himself.
Tuesday morning he toured a sewage pump station in Kakaako.
On Monday Blumenfeld spent much of the day at the Navy's Red Hill underground fuel storage facility.
He was struck by the enormity of the place and the risks that come along with it.
"This is the largest underground fuel facility in the world. 250 million gallons is a lot of fuel. We want to make sure if there is a catastrophic event were to happen like an earthquake, that the drinking water supply of Pearl Harbor and Honolulu are safe," said Blumenfeld.
He assured the Navy is on board to find out why 27 thousand gallons leaked out of tank number five earlier this year.
Unitil it does, he said the military has put a hold on any further construction at the facility.
"My goal is to make sure we have an enforceable order with the navy which says this is what needs to be done. It's more than a handshake these are the prescribed activities and it will help make sure to get the money to get those things done and give certainty to us and everyone here in Hawaii,"
A 1998 risk assessment highlighted the potential threat to Halawa Valley---noting the prison and what at the time was minimal use of the area.
But today it is a bustling industrial park and homes have been built up around it.
Long time Moanalua resident Albert Imamura has watched the area develop and while he never thought twice about living next to the facility, the recent leak has left him wanting to know more.
"My primary concern is the closeness it could be to the water table we have limited water on this island," said Imamura.
And it’s precisely what's on Jered Blumenfeld’s mind too.
"This is a warning bell to me. To say, there is a big facility. It was built 70 years ago. It was a engineering feat, it but are the safety precautions in place?” said Blumenfeld.
"Easy to say, but hard to do,” said Imamura.
The retired engineer was thinking about attending a town meeting at Moanalua Elementary school Tuesday.
Area lawmakers organized the briefing by the military and state health department about the cleanup effort and the risks to living close to the facility.