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No brush, roots, sod, or other perishable or unsuitable materials shall be placed in the embankment. <br />If the surface of the prepared foundation or the compacted surface of any layer of earthfill is too dry or <br />smooth to bond property with the layer of material to be placed thereon, it shall be moistened and/or <br />worked with harrow, scarifier, or other suitable equipment, in an approved manner to a sufficient depth to <br />provide a satisfactory bonding surface before the next succeeding layer of earthfill material is placed. If the <br />compacted surface of any layer of the earthfill in-place is too wet for proper compaction of the layer of <br />earthfill material to be placed thereon, it shall be removed; allowed to dry; or be worked with harrow, <br />scarifier, or other suitable equipment to reduce the moisture content to the required amount; and then it <br />shall be recompacted before the next succeeding layer of earthfill material is placed. <br />The earthfill on each side of any structures shall be kept at approximately the same level as the placing of <br />the earthfill progresses, and the structures shall be protected against displacement or other damage. <br />3.04 MOISTURE AND DENSITY CONTROL <br />A. Fill Material <br />'The Standard Optimum Moisture Content is defined as "that moisture content which will result in <br />a maximum dry unit weight of the soil when subjected to the Standard Proctor Compaction Test as <br />described by ASTM D-698." Material shall have a placement moisture content less than 2% below <br />standard optimum condition or more than 3% wet of the standard optimum condition. Additional <br />moisture as required may be applied by sprinkling. <br />Each layer of earthfill material on the embankment shall be compacted as indicated in the section <br />in which applies to the material being placed. During compaction, the placement moisture content <br />and dry density of the earthfill shall be maintained within the control limits specified in each <br />section. <br />The moisture content of the earthfill material prior to and during compaction shall be distributed <br />uniformly throughout each layer of the material. As far as practicable, the materials shall be <br />brought to the proper moisture content by adding supplementary water, if required, to the material <br />by sprinkling on the earthfill and each layer of earthfill shall be conditioned so that the moisture is <br />uniform throughout the layer. <br />Density control of compacted earthfill shall be such that the dry density of the compacted material <br />shall conform to not less than 90% of its Standard Proctor maximum dry density. Material which <br />does not meet these requirements will be rejected and shall be reworked until a dry density equal <br />to or greater than these requirements is reached. <br />3.05 PLACING AND COMPACTING <br />A. Compacted Fill <br />The material shall be placed in areas shown on the plans in continuous and approximately <br />horizontal layers, not more than 12" loose lifts. The combined excavation and placing operations <br />shall be such that the materials will be sufficiently blended to secure the best practicable degree of <br />compaction and stability. <br />The material shall be compacted to 90% of the Standard Proctor as described in ASTM D-698. <br />END OF SECTION <br />Section 02290 -Page 2 of 2 02/06 <br />