FILL AND BACKFILL ADJACENT TO STRUCTURES SUCH AS RETAINING WALLS, PITS, AND BASEMENTS SHALL NOT BE COMPACTED WITH HEAVY EQUIPMENT, BUT SHALL BE COMPACTED WITH HAND-OPERATED, EQUIPMENT TO A SAFE DISTANCE BEYOND THE SIDES OF THE STRUCTURES. EVERY EFFORT SHALL BE MADE TO PLACE BACKFILL MATERIALS SYMMETRICALLY AND IN UNIFORM LAYERS TO PREVENT UNNECESSARY ECCENTRIC LOADING ON A STRUCTURE OR FOUNDATION AS PER RE-621030.