United Parcel Service has notified Kentucky state officials it will lay off more than 400 workers at its Supply Chain Solutions warehouse in Hebron by April 1. UPS, which has operated the logistics operation in Hebron for more than a decade, is not closing the entire operation. The job cuts are prompted by the facility’s largest customer, Zulily, a Seattle-based ecommerce provider of baby items and clothing, deciding to bring its distribution operation in house. The company had been relying on the UPS facility to manage inventory and fill orders.