Field Density Testing includes testing on subgrade, select fill, roadway base and utility trench backfill. Tests will be made on each lift of fill prior to placement of any subsequent lifts. The technician will verify that appropriate proctor is being used and that material used as fill (including select fill or roadway base) meets any written requirements in the plans and specifications. For lime stabilized subgrades, field sieves are performed to ensure gradation requirements are met.