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December 21, 2022 <br /> Job No. 4031.101 <br /> Page 7 <br /> <br />BERLOGAR STEVENS & ASSOCIATES <br /> <br />9. Fill should be properly moisture conditioned and placed in thin lifts (normally 6 to 8 inches <br />depending on the compaction equipment) and compacted as discussed above. <br /> <br />10. Observation and soil density tests should be performed during grading to assist the contractor <br />in obtaining the required degree of compaction and proper moisture content. Where the <br />compaction is outside the range required, additional effort and adjustments to the moisture <br />content should be made until the specified compaction and moisture conditioning is <br />achieved. <br /> <br />11. The soils engineer should be notified at least 48 hours prior to any grading operations. The <br />procedure and methods of grading may then be discussed between the contractor and the <br />soils engineer. <br /> <br />12. The on-site soils are generally suitable for engineered fill, provided they are free of debris, <br />significant vegetation, rocks greater than 4 inches in largest dimension and other deleterious <br />matter. <br /> <br />13. Import fill should contain no deleterious matter or rocks greater than 4 inches in largest <br />dimension and should have a PI less than 20. Fill materials should be subject to the <br />evaluation of the soil engineer prior to their use. Import fill should also be cleared of toxic <br />or hazardous materials prior to importing to the site. <br /> SELECTIVE GRADING <br /> <br />Selective grading should be performed to improve near surface soil conditions for foundations and <br />pavement performance. We recommend that the expansive clay on the eastern portion of the site <br />be removed to a depth of 3 feet below pad grade. The expansive clays can be placed in areas of <br />the deeper fills (northwestern portion of the site) such that they are at least 4 feet below pad grade. <br /> <br /> EARTHWORK BALANCE DURING GRADING <br /> <br />Based on the subsurface data collected as a part of this investigation and the proposed grading <br />plan, we recommend that the following volumes changes be considered in design of the grading <br />plan: <br />• General Cuts and Fills – 2500 cubic yards swell <br />• Rework of the Orchard Area – 20,000 cubic yards shrinkage. <br /> <br /> EXCAVATION CHARACTERISTICS <br /> <br />Subsurface conditions encountered in the test pit and borings suggest that the on-site earth <br />materials can generally be excavated to planned grades using conventional earth moving <br />equipment.