Problem: The Sun ‘n Lake Improvement District in Sebring, Fla., experienced a loss of detention volume and reduced water quality as a result of accumulated sand and grit at one of its wastewater treatment plants. The district contemplated a major capital expansion to increase the functional capacity and efficiency of its 700,000 gpd facility.Solution: The district hired Polston Applied Technologies to help with the problem. They developed the PAT 949 Combination Truck and a method, called the Polston Process, to remove accumulated sand and grit while the plant remains in operation.Result: The unit pulled more than 175 cubic yards of accumulated sand from the wastewater treatment plant without taking the system offline. The district was
