RESETTLEMENT PLANS SET BACK
The Environmental Protection Agency said today that it had found unexpected leaking of chemicals at the Love Canal in Niagara Falls, N.Y., calling into question last year's Federal declaration that the area was safe to live in. The agency said a ''total review'' was needed of the scientific data amassed by the agency last year and used as the basis for the declaration that the area - a block and a half to six blocks from the contaminated canal - was habitable. The canal, where thousands of tons of toxic chemical wastes were dumped in the 1940's and 1950's, was declared a Federal emergency area in 1980. Hundreds of families were moved from their homes in 1978 and 1980.