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EUREKA, Mo. (AP) — The federal government will spend more than $28 million to remove 428 tons of lead-contaminated soil from yards in Jefferson County, south of St. Louis.

The Environmental Protection Agency announced the funding Wednesday, estimating that about 800 residential properties will require remediation.

Sampling has found widespread lead contamination in the flood plain of the Big River, which begins at Leadwood and runs to the Meramec River confluence near Eureka.

Excavated soil will be taken in covered trucks to a landfill in nearby Washington County.

Officials believe the soil was contaminated by old mine workings.