GRAYSLAKE — There is a hum in the air inside the new 214,000-square-foot FedEx Ground distribution facility off Route 83 — the sound of packages in the process of going from here to there.First, a semi truck will back up to one of the 143 bays that line the west side of the structure, and employees will unload about 1,000 packages by hand onto the first of several ramps equipped with metal …
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