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2.02 EMBANKMENT MATERIALS SUMMARY Minimum Placement Minimum Construction Unified Soils Class and Testing Testing Zone Requirements Compaction Requirements Interval Requirements Embankment CL,SC,GC,GW-GC,GP-GC 95%of ASTM Density by nuclear Each 1,000 yds3 D698 gage,ASTM D698 (or 2 per day when soil is placed, whichever is larger) Sieve analysis,ASTM Each 10,000 yds3 D422 Atterberg limits, Each 10,000 yds3 ASTM D4318 Pit Run Fill GW,GP,GM,SW,SP,SM Performance Density by nuclear Each 1,000 yds3 Specification gage,ASTM D698 (or 2 per day when soil is placed, whichever is larger) Sieve analysis,ASTM Each 5,000 yds3 D422 PART 3-EXECUTION 3.01 GENERAL No material shall be placed in any portion of the embankment until the foundation for each section has been stripped,suitably prepared,and has been approved by the Engineer. A foundation check sheet shall be signed by the Contractor and Engineer before soil placement. All cavities,depressions and irregularities,within the area to be covered by embankment and which extend below or beyond the established lines of excavation for dam embankment foundations,shall be filled with embankment materials as specified for the overlying embankment. 3.02 STRIPPING The entire area to be occupied by the embankment shall be stripped to the depth shown on the Construction Drawings or to a sufficient depth,as determined by the Engineer,to remove all unsuitable materials. The unsuitable materials to be removed by stripping shall include all debris,topsoil,vegetable matter,including roots and all other perishable and objectionable materials that are unsuitable for use in permanent construction required under these Specifications or that might interfere with the proper bonding of the embankment with the foundation or the proper compaction of the materials in the embankment,or that may be otherwise objectionable as determined by the Engineer. If suitable,stripped material shall be stockpiled for future use as topsoil. 3.03 FOUNDATION PREPARATION The foundation shall be tested with density gauge and/or proofrolled as approved by the Engineer prior to placement of any soils. Prior to placement of the embankment,the entire foundation shall be stripped to a depth of 12",as shown on the Plans,and properly prepared. Locally,stripping may have to be deeper to reach a suitable subgrade. All loose materials shall be removed. The foundation shall be moisture conditioned and rolled with a sheepsfoot compactor prior to placement of the first lift of embankment soil. Section 02290-Page 2 of 4 February 2016