HONOLULU (HawaiiNewsNow) - The U.S. Navy has released lab data looking at the steel liner plates inside the Red Hill underground fuel tanks.
The information was sent Monday to the state Department of Health and U.S. Environmental Protection Agency.
The Navy sent 10 steel samples, known as coupons, from one of the tanks to an independent laboratory for corrosion testing.
The lab data includes coupon thickness, corrosion pit depth, the chemical composition of concrete and steel samples and other information.
Outside experts will now assess it for corrosion and other potential flaws.
It’s part of the analysis of the structural integrity of the facilities.
Meanwhile, the Sierra Club is claiming that some of the steel samples have been reduced by a third due to corrosion.
The environment group says it’s key that the Navy adds “secondary containment” to prevent leaks — or to move the tanks entirely away from a key source of Oahu’s drinking water.
The Honolulu City Council is scheduled to vote Tuesday on a resolution urging the DOH and EPA to reject the approval of single wall tank upgrades.
Concern about the tanks arose in 2014, when 2,700 gallons of jet fuel leaked.
In a statement, the Navy said that Red Hill underground fuel tanks are “still twice as thick as the petroleum industry’s closest comparable minimum standard for tank walls.”
The Navy added that it’s closely monitoring the situation.