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KLE/NFELOER <br /> �Bright People.Right Solutions. <br /> 5.12 SOIL CORROSION <br /> Kleinfelder has completed laboratory testing to provide data regarding corrosivity of onsite soils. <br /> Our scope of services does not include corrosion engineering and, therefore, a detailed analysis <br /> of the corrosion test results is not included in this report. A qualified corrosion engineer should be <br /> retained to review the test results and design protective systems that may be required. Kleinfelder <br /> may be able to provide those services. <br /> Laboratory chloride concentration, sulfate concentration, pH, and electrical resistivity tests were <br /> performed on two near-surface soil samples by Sunland Analytical. The results of the tests are <br /> included in Appendix B and are summarized in Table 5-8. If fill materials will be imported to the <br /> project site, similar corrosion potential laboratory testing should be completed on the imported <br /> material. <br /> Table 5-8 <br /> Soil Corrosion Potential Laboratory Test Results <br /> Minimum Water-Soluble Ion <br /> Test Pit Depth, Material Resistivity, pH Concentration, ppm <br /> ID feet ohm-cm Chloride Sulfate <br /> Moderately to <br /> B-3 0 to 5 highly 1,070 7.49 3.3 7.3 <br /> expansive clay <br /> (CH-CL) <br /> The following summary is provided with respect to the results presented in Table 5-8 and <br /> applicable references. Note that the 2019 CBC refers to ACI 318, Section 4.2, for corrosion <br /> exposure potential for concrete in contact with soils. <br /> • The measured minimum resistivity values indicate the soils are "highly to extremely <br /> corrosive" to buried ferrous metals. These correlations are based on Corrosion Basics, <br /> 2nd edition, Roberge, 2006. <br /> • A water-soluble chloride content of less than 500 ppm is generally considered non- <br /> corrosive to reinforced concrete. The sample tested from B-3 had "3.3 ppm" soluble <br /> Chloride content. According to the American Concrete Institute (ACI) 318-08, Table 4.2.1, <br /> the Exposure Severity and Class for corrosion protection of reinforcement are "Not <br /> Applicable" and "CO" if the concrete is dry or protected from moisture, and "Moderate" and <br /> "Cl" if the concrete is exposed to moisture but not to external sources of chlorides. For <br /> 20210067.001A/ST02OR111447 Page 34 of 37 May 11, 2020 <br /> ©2020 Kleinfelder www.kleinfelder.com <br />