19. Controls Engineering Control Summary * Dense graded aggregate will satisfy NJDOT Specifications ** Clean fill will satisfy New Jersey requirements for certified clean fill Planting pit will be sized to radially surround rootballs (diam. 2’) with 2’ of backfill material for total 4’ clean material **about plant. Trees and Shrubs 6” planting material to be underlain by 6’’ clean fill ** Groundcover SOIL CAP Trenches will be filled with dense graded aggregate overlain by typical asphalt, concrete or soil cap profile. Bedding material for utility pipe will consist of minimum 6” dense graded aggregate *. Utility Trenches UTILITY TRENCHES 4" concrete slab underlain by compacted dense graded aggregate *. Concrete foundations for structures 4" concrete slab underlain by compacted dense graded aggregate *. Concrete sidewalks CONCRETE CAP 2" surface coarse pavement underlain by 4" bituminous stabilized base course, 6" dense graded aggregate *. Asphalt paved roads and drives ASPHALT CAP