1901 E Dyer Rd - Soils Report - Laserfiche WebLink

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Alliance Residence October 18,2016 J.N.: 2530.00 Page 9 5.6 MATERIAL CHARACTERISTICS The surficial earth materials are anticipated to be relatively easy to excavate with conventional heavy earthmoving equipment. Some earth materials in the near surface exhibit elevated moisture contents and therefore will require drying techniques to achieve proper compaction. The site contains materials with very differing characteristics with layers of clay soils and layers of granular soils. Excavations at the site are anticipated to encounter both materials resulting in a mixture of the two dissimilar materials. The contractor should anticipate the need to blend these differing materials in order to create a relatively uniform soil mix to make the materials suitable for placement as fill. 5.7 SHRINKAGE AND SUBSIDENCE Volumetric changes in earth quantities will occur when excavated onsite soil materials are replaced as properly compacted fill. We estimate the upper 4 to 6 feet of surficial soils will shrink approximately 4 to 10 percent. Reprocessing of removal bottoms are anticipated to result in a general subsidence of approximately 0.05 foot. The estimates of shrinkage and subsidence are intended as an aid for project engineers in determining earthwork quantities. However, these estimates should be used with some caution since they are not absolute values. Contingencies should be made for balancing earthwork quantities based on actual shrinkage and subsidence that occurs during the grading process. 6.0 RECOMMENDATIONS 6.1 EARTHWORK 6.1.1 General Earthwork and Grading Specifications All earthwork and grading should be performed in accordance with applicable requirements of Cal/OSHA, applicable specifications of the Grading Codes of the City of Santa Ana, California in addition to the recommendations presented herein. 6.1.2 Pre-Grade Meeting and Geotechnical Observation Prior to commencement of grading, we recommend a meeting be held between the developer, City Inspector, grading contractor, civil engineer, and geotechnical consultant to discuss the proposed grading and construction logistics. We also recommend a geotechnical consultant be retained to provide soil engineering and engineering geologic services during site grading and foundation construction. This is to observe compliance with the design specifications and recommendations and to allow for design changes in the event that subsurface conditions differ from those anticipated. If conditions are encountered that appear to be different than those indicated in this report, the project geotechnical consultant should be notified immediately. Design and construction revisions may be required. ALBUS-KEEFE & ASSOCIATES, INC.