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- Mäkua sits over the Kea'au aquifer, which may be connected to the MŠkaha aquifer - over 4000 residents of MŠkaha get their water from the MŠkaha aquifer.
- Dangerous levels of lead and nickel have already been found in the groundwater at one site in Mäkua, but complete testing hasn't been done.
- Under Federal regulations, Mäkua is considered a Solid Waste Management Unit (SWMU). However, the Army has not made a complete disclosure of what has been dumped there since 1941.
- The Army has disposed of 10.5 million lbs. of waste in Mäkua-over 50% which is considered hazardous.
- Waste materials disposed in Mäkua include:
High explosives: TNT, DNT, white phosphorus
Toxic chemicals: cyanide, radioactive cesium
Heavy metal: lead, mercury, chromium
- Disposal of an unknown number of tons of ordinance from Vietnam
- Three hundred fifty 900-lb napalm bombs
- Picric acid and other toxic materials
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