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The new Willis Avenue Groundwater Treatment Plant will process and treat contaminated groundwater that will accumulate behind a one and one-half mile long and 45-foot deep barrier wall on the southwestern shore of the lake.

The new Willis Avenue Groundwater Treatment Plant will process and treat contaminated groundwater that will accumulate behind a one and one-half mile long and 45-foot deep barrier wall on the southwestern shore of the lake.

The new Willis Avenue Groundwater Treatment Plant will process and treat contaminated groundwater that will accumulate behind a one and one-half mile long and 45-foot deep barrier wall on the southwestern shore of the lake.