
Ten years ago, the Army installed a special device to filter toxic chemicals from the water when a cancer-causing solvent showed up. The solvent was once used to clean machinery and wash down aircraft.
Officials say the solvent may be more than 600 feet underground, making cleanup virtually impossible.
The Environmental Protection Agency is monitoring the cleanup. Schofield was identified as the first federal "Superfund" cleanup site in Hawaii.
The land transfer will partially cover the $600 million settlement with the Hawaiian Homes Trust for the state's improper use of Hawaiian lands, Cayetano said yesterday.
The state Housing Finance and Development Corp. and the Hawaiian Homes Commission still must negotiate the value of the land transfer.
The transfer includes 40.5 acres in Kapolei on Oahu and nearly 51.5 acres in La'i'opua in Kona on the Big Island.

The car was found parked at a residence on Poliala Street in Waimanalo about 4 a.m. today. Police arrested a 26-year-old resident on suspicion of auto theft.
The officer was treated at Castle Hospital for a broken nose in Saturday's incident.
He had spotted the car parked off Kapaa Quarry Road just after midnight Saturday and stopped to investigate after dispatchers confirmed the car had been reported stolen hours earlier in Kailua while the owner was attending a party.
The officer heard a noise behind him and was assaulted from behind.
A brief struggle ensued and the suspect fled toward the parked Acura and drove off, police said.
As the officer was radioing for assistance, he saw another man standing on the passenger side of his police car pointing a revolver at him. The officer drew his gun and fired at the suspect who ran, but turned and fired back.
The suspect apparently fled on foot, police said. It is unknown if he was injured.
At a preconfinement hearing yesterday, the magistrate determined that there is enough evidence to hold the men.
The three men, ages 20, 21 and 22, have not been charged in the May 7 killing. A fourth Marine was taken into custody Friday in San Diego and will be returned to Hawaii to face charges, a Marine spokesman said.
The men were arrested after one of the Marines allegedly confessed and implicated the others on June 3, the day Guerrero's body was found off Nuuanu Pali Drive.
Guerrero, 20, of Los Angeles, was a member of the Communications Platoon, Combat Support, 3rd Marine Regiment. The suspects are in the same unit.
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