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<br /> <br /> 6 Parsons-1-01 <br /> <br /> <br />Excavation activities should not disturb adjacent structures or undermine any adjacent footings. <br />Existing utilities should be removed and adequately capped at the project boundary line or <br />salvaged/rerouted as designed. <br />7.3 FILL PLACEMENT AND COMPACTION REQUIREMENTS <br />Material for engineered fill should be select free of organic material, debris, and other <br />deleterious substances, and should not contain fragments greater than 3 inches in maximum <br />dimension. On-site excavated soils that meet these requirements may be used to backfill the <br />excavated building area. <br />All fill should be placed in 6-inch-thick maximum lifts, watered or air dried as necessary to <br />achieve near optimum moisture conditions, and then compacted in place to a maximum relative <br />compaction of 90 percent. The laboratory maximum dry density and optimum moisture content <br />for each change in soil type should be determined in accordance with Test Method <br />ASTM D 1557. A representative of the project consultant should be present on-site during <br />grading operations to verify proper placement and compaction of all fill, as well as to verify <br />compliance with the other geotechnical recommendations presented herein. <br />Imported soils, if any, should consist of clean materials exhibiting a VERY LOW expansion <br />potential (Expansion Index less than 20). Soils to be imported should be approved by the <br />project geotechnical consultant prior to importation. <br />7.4 GEOTECHNICAL OBSERVATIONS <br />Exposed bottom surfaces in each removal area should be observed and approved by the project <br />geotechnical consultant prior to placing fill. No fill should be placed without prior approval <br />from the geotechnical consultant. <br />The project geotechnical consultant should be present on site during grading operations to <br />verify proper placement and compaction of fill, as well as to verify compliance with the <br />recommendations presented herein. <br />7.5 POST-GRADING CONSIDERATIONS <br />Positive drainage devices such as concrete flatwork, graded swales, and area drains should be <br />provided around the new construction to collect and direct all water to a suitable discharge area.