Just prior to 1730 hours, Sussex EOC alerted Station 85 for a hazmat incident in the Food Lion Shopping Center on Broadkill Rd. 85-8 arrived shortly after dispatch with Captain Millman as the commanding officer, to find a large area of grease and oil throughout the parking lot. Captain Millman immediately requested a response from DNREC to assist with the incident. Upon further investigation, it was found that one of the grease / waste oil traps for the shopping center had overflowed. Crews used stay dry to assist with absorbing the grease. Crews closed the parking area down until the arrival of DNREC. Units responding, 85-8, A-85, Rescue 85, Engine 5, 85-00, DSFP, Milton PD, DNREC.