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• <br /> • (7-----.\ <br /> • KLE/NFELDER <br /> �—�Blight People.Right Solutront. <br /> • <br /> • <br /> • 4.5.7 Temporary Excavations <br /> 0 <br /> All excavations must comply with applicable local, state, and federal safety regulations, <br /> • including OSHA requirements. The responsibility for excavation safety and stability of temporary <br /> • construction slopes lies solely with the contractor. We are providing this information below solely <br /> as a service to our client. Under no circumstances should this information provided be <br /> • interpreted to mean that Kleinfelder is assuming responsibility for final engineering of <br /> excavations or shoring, construction site safety, or the contractors' activities; such responsibility <br /> • is not being implied and should not be inferred. <br /> • <br /> • Minor sloughing and/or raveling of slopes should be anticipated as they dry out. Where space <br /> • for sloped embankments is not available, shoring will be necessary. In addition, excavations <br /> within a 1:1 plane extending downward from a horizontal distance of 2 feet beyond the bottom <br /> • outer edge of existing improvements should not be attempted without bracing and/or <br /> • underpinning the footings, as discussed above. The geotechnical engineer or their field <br /> • representative should observe the excavations so that modifications can be made to the <br /> • excavations, as necessary, based on variations in the encountered soil conditions. All applicable <br /> • excavation safety requirements and regulations, including OSHA requirements, should be met. <br /> • <br /> • All trench excavations should be braced and shored in accordance with good construction <br /> • practice and all applicable safety ordinances and codes. Stockpiled (excavated) materials <br /> • should be placed no closer to the edge of an excavation than a distance equal to the depth of <br /> • the excavation, but no closer than 4 feet. <br /> • <br /> • 4.6 SOIL CORROSIVITY <br /> • <br /> A preliminary evaluation of the corrosion potential of the on-site soils to steel and buried <br /> • concrete was completed. Laboratory testing was performed on a representative soil sample to <br /> • evaluate pH, minimum resistivity, chloride and soluble sulfate content. The test results are <br /> • presented in Table 4. <br /> • <br /> • <br /> • <br /> • <br /> • <br /> • <br /> • 20203884.001A/SEA20R110164 Page 22 of 28 June 1, 2020 <br /> ©2020 Kleinfelder <br /> • <br /> • <br />