6617 ASSOCIATED BLVD AMAZON Geotech Report 2022-10-25

• • KL E/NFEL DER• Bnght People.Right SolutioM. • • Table 4 Corrosivity Test Results • • Minimum Soluble Soluble • Boring Depth Resistivity pH Sulfate Chloride (ft) (ohm-cm) Content Content • (mg/Kg) (ppm) • B-4 2.5 - 5 7,300 10.1 130 ND • • These tests are only an indicator of soil corrosivity for the samples tested. Other soils found on • site may be more, less, or of a similar corrosive nature. Imported fill materials should be tested • to confirm that their corrosion potential is not more severe than those noted. • • Resistivity values between 5,000 to 9,999 ohm-cm are considered moderately corrosive to • buried ferrous metals (Roberge, 2006). The concentrations of soluble sulfates indicate that the • subsurface soils represent a Class SO exposure to sulfate attack on concrete in contact with the soil based on ACI 318-14 Table 19.3.1.1 (ACI, 2014). Therefore, in accordance with ACI • Building Code 318-14, no special provisions for selection of cement type are required. • • Kleinfelder's scope of services does not include corrosion engineering and, therefore, a detailed • analysis of the corrosion test results is not included. We recommend the review of these results • and consultation of a corrosion expert for further evaluation, if necessary. • • • • • • • • • • • • • • • • 20203884.001A/SEA20R110164 Page 23 of 28 June 1, 2020 ©2020 Kleinfelder • •