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' H. When existing ground surface has a density less than that specified for particular area classification, break up ground surface, pulverize, moisture - condition to optimum moisture content, and compact to required depth and percentage of maximum density. t I. Before compaction, moisten or aerate each layer as necessary to provide optimum moisture content. Do not place backfill or fill material on surfaces that are muddy, frozen, or contain frost or ice. J. Place backfill and fill materials evenly adjacent to structures, without wedging against structures or displacement of piping or conduit. Compaction equipment used within 10 ft. of buried walls and soil supported structures shall not exceed 2000 lbs. 3.06 COMPACTION 07/06 A. Areas to be compacted shall be moistened and compacted by either rolling, tamping or any other approved method by the Engineer in order to obtain a minimum 90% standard proctor density for the foundation, bedding, haunching, and initial backfill, and a minimum of 85% standard proctor density for the final backfill. The Contractor shall inspect all compacted areas prior to further construction operations to ensure that satisfactory compaction has been obtained. All backfill adjacent to structures and pipes shall be compacted to a density of not less than 100 percent of the maximum standard proctor density. If density tests are required, such tests shall be made as directed by the Engineer at the 02221 -11 05 -5564 structural performance of the pipe, the initial backfill need only extend to the pipe diameter. Class I, Il, or III materials may be used as initial backfill however: a. Class I materials must be used in wet trenches if Class I bedding and haunching materials are used. b. Class II materials must be compacted in 6" lifts to 90% ' standard proctor density. C. Class III materials must be compacted in 6" lifts to 90% standard proctor density. G. Final Backfill: 1. Final backfill may be Class I, II, or III and must be placed and compacted in 12" maximum lifts and compacted to a minimum of 85% standard proctor density to prevent excessive settlement at the surface. ' H. When existing ground surface has a density less than that specified for particular area classification, break up ground surface, pulverize, moisture - condition to optimum moisture content, and compact to required depth and percentage of maximum density. t I. Before compaction, moisten or aerate each layer as necessary to provide optimum moisture content. Do not place backfill or fill material on surfaces that are muddy, frozen, or contain frost or ice. J. Place backfill and fill materials evenly adjacent to structures, without wedging against structures or displacement of piping or conduit. Compaction equipment used within 10 ft. of buried walls and soil supported structures shall not exceed 2000 lbs. 3.06 COMPACTION 07/06 A. Areas to be compacted shall be moistened and compacted by either rolling, tamping or any other approved method by the Engineer in order to obtain a minimum 90% standard proctor density for the foundation, bedding, haunching, and initial backfill, and a minimum of 85% standard proctor density for the final backfill. The Contractor shall inspect all compacted areas prior to further construction operations to ensure that satisfactory compaction has been obtained. All backfill adjacent to structures and pipes shall be compacted to a density of not less than 100 percent of the maximum standard proctor density. If density tests are required, such tests shall be made as directed by the Engineer at the 02221 -11 05 -5564