SEOUL (AFP) - Traces of toxic chemicals have been found at a US military camp but there is no evidence yet to support claims that Agent Orange was buried there in 1978, South Korean and American investigators said Friday. Dangerous levels of trichloroethylene and tetrachloroethylene were detected in underground waters at Camp Caroll near the southeastern city of Daegu, the joint team said in a statement. Trichloroethylene is commonly used as an industrial solvent and tetrachloroethylene is used for dry cleaning of fabrics. The team has been investigating allegations that large amounts of Agent Orange were dumped and buried at the US logistics base in 1978.