Where a fill condition exists, all topsoil and unsuitable material shall be removed. Subgrade shall be rolled or tamped before granular fill is placed. Fill shall be placed in six (6) inch layers to the proper subgrade elevation. Side slopes of fill material shall not exceed one (1) foot vertical to three (3) feet horizontal. Where a cut condition exists, all top soil and unsuitable material shall be removed. Subgrade shall be removed to the property elevation to allow sufficient width to accommodate the forms.