ĐỒNG NAI — Nearly three hectares of dioxin-polluted land southwest of Biên Hòa air base, the most contaminated area in Việt Nam, has been treated and handed over to the southern province of Đồng Nai. Under the new contract, Nelson Environmental Remediation USA, an American small business, will design and build a treatment facility to decontaminate soil and sediment on and around the air base. The Biên Hòa clean-up project was launched in April 2019 and is expected to take 10 years to complete and cost up to $450 million. Gen. Hoàng Xuân Chiến, Deputy Minister of National Defence, said that the Biên Hòa air base clean-up is an important project for cooperation between the US and Việt Nam in overcoming war consequences. Locations with a high density of dioxin remain, among them are Đà Nẵng, Biên Hòa (in Đồng Nai Province) and Phù Cát (in Bình Định Province).