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<br />330 Land Company, LLC 9785.004.001 <br />Arroyo Lago October 31, 2025 <br />RESPONSE TO CITY REVIEW COMMENTS Page 4 <br /> <br />ENGEO Response to Comment 9 <br /> <br />No exceptions taken. Section 3.5.2 has been added to discuss the impacts of differential fill within <br />the emergency swale area. <br /> <br />BSK Comment 10 – Geotechnical Report, Section 3.6, Corrosion Potential <br /> <br />Because only one corrosion test was performed for such a large project site, we suggest that in <br />addition to recommending that a corrosion consultant be retained, consideration be given to <br />recommending additional corrosivity testing. <br /> <br />ENGEO Response to Comment 10 <br /> <br />We anticipate the majority of utilities will be in engineered fill. Engineered fill brought on site to <br />raise site grades will be screened during grading for corrosivity. <br /> <br />BSK Comment 11 – Geotechnical Report, Section 5.0, Earthquake Recommendations <br /> <br />a. ENGEO should also discuss the backfill of the emergency swale in this section. As noted in <br />Comment #9 above, the emergency swale is as deep as 5 feet bgs in some areas and will <br />therefore result in differential fill depths across some residential lots. <br />b. It appears that earthwork recommendations for “structural areas” may be missing from the <br />geotechnical report as it is mentioned in this section but not referenced again in the remainder <br />of the geotechnical report. <br /> <br />ENGEO Response to Comment 11 <br /> <br />a. Section 5.3.2 has been added to discuss differential fill thickness considerations for lots <br />located within the emergency swale area and in other areas of the site. <br />b. The reference to “structural areas” has been removed from Section 5.0. <br /> <br />BSK Comment 12 – Geotechnical Report, Section 5.2, Surcharge Program <br /> <br />ENGEO should mention the emergency swale because it is as deep as 5 feet bgs in some areas <br />and will therefore result in differential fill depths across residential lots. <br /> <br />ENGEO Response to Comment 12 <br /> <br />Fills ranging from 3 to 7 feet will be placed to reach pad grades in the lots the emergency swale <br />passes through. Surcharge heights in these areas should be selected in Tables 5.2-1 and 5.2-2 <br />by using an average of the total civil fill placed in the area. Additional discussion has been added <br />to clarify surcharge height selection. <br /> <br />