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KLE/NFELOER <br /> �Bright People.Right Solutions. <br /> 5.2.5 Engineered Fill <br /> 5.2.5.1 Onsite Materials <br /> The on-site soils are suitable for use as engineered fill, provided the materials are free of debris, <br /> significant organics or other deleterious materials, and have a maximum particle size less than 3 <br /> inches in maximum dimension. On-site soils used as engineered fill should be placed in horizontal <br /> lifts less than about 8 inches in loose thickness, uniformly moisture conditioned to between about <br /> 2 and 4 percentage points above the optimum moisture content, and be compacted to at least 90 <br /> percent relative compaction, as determined by ASTM D1557. Where imported material is brought <br /> in for engineered and "non-expansive" fill, it is recommended that it be granular in nature and <br /> conform to the minimum criteria discussed in Section 5.2.5.2. <br /> 5.2.5.2 Import and Non-Expansive Fill Requirements <br /> In addition to the above requirements, specific requirements for imported engineered fill and non- <br /> expansive fill as well as applicable test procedures to verify material suitability are provided in <br /> Table 5-1. <br /> Table 5-1 <br /> Imported Engineered Fill Requirements <br /> Fill Requirement Test Procedures <br /> Gradation ASTM' Caltrans2 <br /> Sieve Size Percent Passing <br /> 3 inch 100 D422 202 <br /> 3/4-inch 70-100 D422 202 <br /> No. 200 15-70 D422 202 <br /> Plasticity <br /> Liquid Limit Plasticity Index <br /> <35 <12 D4318 204 <br /> Organic Content <br /> No visible organics --- --- <br /> Expansion Potential --- <br /> 20 or less D4829 --- <br /> Soluble Sulfates <br /> Less than 2,000 ppm --- 417 <br /> Soluble Chloride <br /> Less than 300 ppm --- 422 <br /> Resistivity <br /> Greater than 2,000 ohm-cm --- 643 <br /> American Society for Testing and Materials Standards (latest edition) <br /> 2 State of California, Department of Transportation, Standard Test Methods (latest edition) <br /> 20210067.001A/ST020R111447 Page 12 of 37 May 11, 2020 <br /> ©2020 Kleinfelder www.kleinfelder.com <br />