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completed work. Rejection of such materials by the Engineer can be made in the borrow areas, transportation <br />vehicles, or in-place in the completed work. The Contractor shall cooperate with the Engineer to provide access to <br />the work areas as needed for testing and to insure that only acceptable materials will be incorporated into the <br />completed work. <br />14.4. Unacceptable work shall be reworked until satisfactory tests are obtained, or shall be removed and <br />replaced to meet the requirement of this specification. <br />14.5. The following tests, either in the field or in the laboratory, will be pertormed to identify materials, to <br />determine the compaction characteristics, to define the moisture content of earth material and to determine the in- <br />place density of the compacted fill. The Contractor shall aid and cooperate with the Engineer in obtaining samples <br />of the earth materials for testing. <br />14.5.1. Unified classification of soil, ASTM D 2487. <br />14.5.2. Density of fill by in-place sand cone method, ASTM D 1556, or nuclear density, ASTM D 2922. <br />14.5.3. Relative density, ASTM D 4253 and D 4254. <br />14.5.4. Grain size analysis of the soil, ASTM D 422. <br />14.5.5. Moisture content of the soil, ASTM D 2216 and D 3017. <br />14.5.6. Moisture-density relationship, standard Proctor density, ASTM D 698. <br />14.5.7. The gradation of riprap bedding may be tested after placement in accordance with ASTM D 422 at <br />least once for every 500 cubic yards of material placed. <br />14.5.8. Fill placement may be tested by conducting at least one in•place density test in accordance with <br />ASTM D 2922 and ASTM D 2167 for each 10,000 square-feet of lift, or whenever, in the opinion of the <br />Engineers, additional testing may be necessary. <br />14.5.9. A minimum of one direct water content test (ASTM D 2216) and one direct soil density test (ASTM D <br />1556) shall be made for each 15 indirect (nuclear) water <br />SPECIFICATION A EARTHWORK <br />PAGE 9 <br />