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603284-001 <br />limited laboratory testing. Our conclusions and recommendations presented in <br />this report should be reviewed and verified by Leighton during site construction <br />and revised accordingly if exposed geotechnical conditions vary from our <br />preliminary findings and interpretations. The recommendations presented in this <br />report are only valid if Leighton verifies the site conditions during construction. <br />Geotechnical observation and testing should be provided during the following <br />activities: <br />• Grading and excavation of the site; <br />• Overexcavation and compaction; <br />• Compaction of all fill materials; <br />• Shoring system installation; <br />• Excavation and installation of foundations; <br />• After excavation of all slabs and footings and prior to placement of steel or <br />concrete to confirm the slabs and footings are founded in firm, compacted fill; <br />• Utility trench backfilling and compaction; <br />• Pavement subgrade preparation and base course compaction; and <br />• When any conditions are encountered that varies significantly from the <br />conditions described in this report. <br />Leighton should review the grading and foundation plans and specifications, <br />when available, to comment on the geotechnical aspects. Our recommendations <br />should be revised, as necessary, based on future plans and incorporated into the <br />final design plans and specifications. <br />- 32 -40 <br />Leighton <br />SL Rvcd 2019.01.21