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APPENDIX B <br /> RECO��iENDED SPECIFICATIONS FOR C0I4�ACTSD FILL <br /> The following specifications are recommended to provide a <br /> basis for quality control during the placement of compacted <br /> fill and backfill. <br /> 1. ) All areas that are to receive compacted fill shail. be <br /> observed by the soils engineer prior to the placement of new <br /> fill. <br /> 2 . ) Soil surfaces that will receive compacted fill shall be <br /> scarified to depth of at least 6 inches. The scarified soil <br /> shall be moisture-conditioned to obtain soil moisture near <br /> optimum moisture content. The scarified soil shall be <br /> compacted to a minimum relative compaction of 90�. Relative <br /> compaction is defined as the ratio of the inplace soil <br /> density to the maximum dry density as determined by the ASTM <br /> D1557-78 compaction test method. <br /> 3. ) Fill shali be placed in controlled lzyers the thickness <br /> of which is compatible with the type of compaction equipment <br /> use3. The thickness of thP compacted fill layer shall not <br /> exceed the maximum allowable thickness of 8 inches. Each <br /> layer shall be compacted to a minimum relative compaction of <br /> 90�. The field density of the compacted soil shall be <br /> determined by the ASTM D1556-82 test method or equivalent. <br /> 4. } Fill soils shall consist of excavated onsite soils <br /> essentially cleaned of organic and deleterious material or <br /> imported soils approved by the soils engineer. All imported <br /> fill shall meet the gradation limits recommended by the <br /> geotechnical report. The soils engineer shall evaluate <br /> and/or test proposed import material for its conformance <br /> with specifications priur to delivery to the site. The <br /> contractor shall notify the soils engineer 72 hours prior to <br /> importing fill to the site. Rocks larger than 6 inches <br /> shall be broken into particles 6 inches or smaller or hauled <br /> off site. <br /> 5. ) The soils engineer shall observe the placement of <br /> aompacted fill and conduct inplace field density tests on <br /> the compacted fill to check for adequate moisture cuntent <br /> and the required relative compaction. Where less than 90� <br /> relative compaction is indicate3, additional compactive <br /> effort shall be applied and the soil moisture-conditioned as <br /> necessary until 90� relative compaction is attained. The <br /> contractor shall provide level testing pads for the soils <br /> engineer to conduct the field density tests on. <br />