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3.2 FILL SURFACE PREPARATION: Immediately before embankment fill is added to <br /> the existing surface. <br /> 3.2.1 Surfaces to receive fill shall be free of debris, organic materials, particles <br /> larger than six inches, and other deleterious materials. <br /> 3.2.2 Previous fill surfaces to receive additional fill shall be compacted to the <br /> required relative density of 95 percent relative compaction (standard <br /> Proctor)with moisture content within a range of-2 to +2 percent of the <br /> optimum moisture content. <br /> 3.2.3 Prior to placement of subsequent lifts, previous fill surfaces shall be <br /> scarified with a disc or similar equipment and moisture conditioned to <br /> facilitate bonding with the new fill. <br /> 3.2.4 Surfaces to receive fill shall not have ponded water, snow or ice, nor be <br /> desiccated or cracked. <br /> 3.3 PLACEMENT AND COMPACTION <br /> 3.3.1 Materials shall be placed in lifts not greater than 8 inches of thickness <br /> unless greater thicknesses are allowed by the Engineer upon <br /> demonstration by the Contractor that the materials and compaction efforts <br /> are adequate to obtain the required density. <br /> 3.3.2 Material shall be placed in a uniform lift and thoroughly compacted by <br /> compaction equipment suitable for the material encountered to obtain the <br /> required density prior to the placement of succeeding lift. <br /> A. Each lift shall be tested for proper compaction before successive <br /> lifts are applied. <br /> 3.3.3 Stone shall be defined as rock material either in its natural or broken <br /> state. Stones shall not exceed 6 inches in greatest dimension and shall <br /> be well distributed throughout the soil mass. <br /> 3.3.4 Stones not well mixed with soil material shall not be used in earth <br /> embankments unless the stone material is sufficiently deteriorated or <br /> friable so as to be compactible to achieve minimum voids and required <br /> density. <br /> 3.3.5 If the required density is not obtained, compaction of the embankment <br /> shall continue until specified densities are obtained, before any additional <br /> embankment is placed. Improperly compacted embankment shall be <br /> removed. <br /> 3.3.6 Where required, the Contractor shall, at his/her expense, add sufficient <br /> water during the compaction effort to assure proper density. If, due to rain <br /> or other causes,the material exceeds the optimum moisture content for <br /> 02200-3 <br />