The U.S. Environmental Protection Agency has inspected two Nanakuli illegal dumping sites — on Hakimo Road and Haleahi Road — and determined that the streams and groundwater were not contaminated, but lead and other hazardous chemicals are being removed from the sites.

Two weeks ago, officials found 55-gallon drums containing chemicals along with large amounts of gasoline, hundreds of gallons of waste oil, hundreds of tires and a large number of thrown-away batteries — still containing acid — and used automobile antifreeze, which contains lead.

On Hakimo Road, crews are still working to remove the deeply buried toxins. High levels of lead were found and those "hot spots" will be removed, said Dean Higuchi, EPA press officer.

Federal prosecutors charged two convicted felons with firearm offenses and possession of three stolen vehicles on the 10-acre Hakimo Road property, which was raided May 13 for investigation of illegal dumping.

"The key message is that everything that was there that could have been a potential hazard will be removed," Higuchi said. "We're still working on the sites as far as cleanup goes. The Haleahi area has been taken care of and the Hakimo Road site is still under investigation."

On Haleahi Road near Kaupuni Stream, officials found leaking containers of oil that were found to have the solvent perchloroethylene, which is used in dry cleaning, and polycholorinated biphenals, or PCBs, an oil used in electrical transformers.

"We're working with the state and the county to encourage people not to dump stuff," Higuchi said. "We're trying to prevent people from illegal dumping. There are proper places where things can be taken and accepted."