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<br />Hana Japan Steak House 5150.100.001 <br />11991 Dublin Canyon Road November 11, 2024 <br />RESPONSE TO COMMENTS Page 3 <br /> <br />ENGEO Response to Comment 4 <br />This modification between the project at the time of our 2008 report and the current plan is <br />acknowledged. We will update our project description in the Reference 2 update. With proper <br />implementation of the recommended building subdrain (Section 6.8.2) and slab vapor moisture <br />reduction system (Section 8.2.2), we opine that this change is unlikely to impact performance of the <br />building. <br /> <br />Comment 5 Geotechnical Report, Section 3 (Project Description): <br />This section of the Geotechnical Report states that site improvement will include cuts up to 16 feet. <br />However, Sheet C4 of the Project Plans shows greater than 20 feet of cuts along the east edge of the <br />planned building footprint. ENGEO should evaluate whether this is a concern or not. <br /> <br />ENGEO Response to Comment 5 <br />We will update this description in the Reference 2 update. This change in cut height will not impact <br />site performance. <br /> <br />Comment 6 Geotechnical Report, Section 4.3 (Subsurface Conditions): <br />Consideration should be given to presenting the previous boring logs by Hydro-Geo Consulting and <br />Harding Lawson Associates in an Appendix of the Geotechnical Report. The locations of these boring <br />logs are shown on Figure 2 of the Geotechnical Report. <br /> <br />ENGEO Response to Comment 6 <br />Unfortunately, we do not have records of these borings in our files anymore. We are unable to include <br />them. <br /> <br />Comment 7 Geotechnical Report, Section 4.5 (Laboratory Testing): <br />Corrosivity testing consisted of pH and sulfate testing. It is a standard of practice to include resistivity <br />testing as well. Consideration should be given to conducting resistivity testing after mass grading to <br />help assess corrosion potential of buried metal. Depending on such test results, corrosivity mitigation <br />measures may be needed, such as wrapping utility piping that is sensitive to corrosion. <br /> <br />ENGEO Response to Comment 7 <br />This is a good suggestion, and we will incorporate it in the Reference 2 update. <br /> <br />Comment 8 Geotechnical Report, Section 5.1 (Expansive Soil): <br />This section states that thicker colluvium soil was encountered on the eastern portion of the Site. <br />Based on our review of the current explorations at the Site, the western portion of the Site has thicker <br />colluvium soil deposits. ENGEO should evaluate whether this is a concern or not. <br /> <br />ENGEO Response to Comment 8 <br />We will clean up this section in the Reference 2 update. The finished floor is at or below the <br />approximate depth of bedrock in the building footprint, and PI testing indicates on-site soil has a PI of <br />25 or less (moderately plastic), so expansive soil should not be a concern. <br /> <br />Comment 9 Geotechnical Report, Section 5.4.1 (Ground Rupture): <br />Please refer to Comment #2.a above regarding the recommended building fault setbacks. Figure 2 <br />may need to be revised accordingly. <br /> <br />ENGEO Response to Comment 9 <br />Addressed in response to Comment 2.