Laserfiche WebLink
3.2 Oversize: Oversize material defined as rock, or other irreducible material with a <br />maximum dimension greater than 8 inches, shall not be buried or placed in fill unless <br />location, materials, and placement methods are specifically accepted by the <br />Geotechnical Consultant. Placement operations shall be such that nesting of oversized <br />material does not occur and such that oversize material is completely surrounded by <br />compacted or densified fill. Oversize material shall not be placed within 10 vertical <br />feet of finish grade or within 2 feet of future utilities or underground construction. <br />3.3 Imnort: If importing of fill material is required for grading, proposed import material <br />shall meet the requirements of Section 3.1. The potential import source shall be given <br />to the Geotechnical Consultant at least 48 hours (2 working days) before importing <br />begins so that its suitability can be determined and appropriate tests performed. <br />4.0 Fill Placement and Compaction <br />4.1 Fill Lavers: Approved fill material shall be placed in areas prepared to receive fill (per <br />Section 3.0) in near -horizontal layers not exceeding 8 inches in loose thickness. The <br />Geotechnical Consultant may accept thicker layers if testing indicates the grading <br />procedures can adequately compact the thicker layers. Each layer shall be spread <br />evenly and mixed thoroughly to attain relative uniformity of material and moisture <br />throughout. <br />4.2 Fill Moisture Conditioning: Fill soils shall be watered, dried back, blended, and/or <br />mixed, as necessary to attain a relatively uniform moisture content at or slightly over <br />optimum. Maximum density and optimum soil moisture content tests shall be <br />performed in accordance with the American Society of Testing and Materials (ASTM <br />Test Method D1557-91). <br />4.3 Compaction of Fill: After each layer has been moisture -conditioned, mixed, and <br />evenly spread, it shall be uniformly compacted to not less than 90 percent of maximum <br />dry density (ASTM Test Method D1557-91). Compaction equipment shall be <br />adequately sized and be either specifically designed for soil compaction or of proven <br />reliability to efficiently achieve the specified level of compaction with uniformity. <br />4.4 Compaction of Fill Slopes: In addition to normal compaction procedures specified <br />above, compaction of slopes shall be accomplished by backrolling of slopes with <br />sheepsfoot rollers at increments of 3 to 4 feet in fill elevation, or by other methods <br />producing satisfactory results acceptable to the Geotechnical Consultant. Upon <br />completion of grading, relative compaction of the fill, out to the slope face, shall be at <br />least 90 percent of maximum density per ASTM Test Method D 1557-91. <br />LGC Valley, Inc. <br />General Earthwork and Grading Specifications <br />Pag i Council 18 — 963 10/3/2023 <br />