Laserfiche WebLink
TABLE 1-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES <br />Significant Impact <br />Significance <br />Before <br />Mitigation <br />Mitigation Measures <br />Significance <br />With <br />Mitigation <br />GEO-3A. The Project could result in a significant impact <br />S <br />GEO-3A. Project -specific geotechnical reports shall be prepared in <br />LTS <br />related to development on unstable geologic units and <br />measures could include retaining structures to stabilize channel <br />accordance with the City's grading permit regulations. The <br />margins, use of deep foundations, removal or improvement of <br />soils or result in lateral spreading, subsidence, <br />liquefiable soils, and/or the use of relatively rigid foundations. <br />recommendations for both special foundations and other <br />S GEO-3C. Settlement of the existing fill and Bay Mud could have LTS <br />liquefaction, or collapse. <br />adverse effects on shallow foundations, underground utilities, <br />geotechnical engineering measures specified in project specific <br />pavements, and other improvements. Options to mitigate these <br />effects include use of shallow ridged foundations for smaller <br />geotechnical reports shall be implemented during design and <br />structures, supporting larger structures with deep foundations such <br />as driven piles, and installing flexible connections for utilities. Pre - <br />construction. These measures include use of deep foundations <br />loading consolidation (surcharging) prior to construction of new <br />improvements could also be considered. The recommendations for <br />engineering and removal or improvement of potentially liquefiable <br />both special foundations and other geotechnical engineering <br />measures specified in project specific geotechnical reports shall be <br />soils. Documentation of the methods used shall be provided in the <br />implemented during design and construction. <br />GEO-4. The Project could create substantial risks to <br />S GEO-4. The Project geotechnical engineer shall make specific LTS <br />reauired desien-level eeotechnical reoort(s). <br />recommendations for mitigation of expansive soils under pavements <br />GEO-313. The Project could result in a significant impact <br />S GEO-313. The potential for lateral spreading shall be evaluated as a LTS <br />related to development on unstable geologic units and <br />part of the required geotechnical reports. Where necessary, <br />soils or result in lateral spreading. <br />corrective measures shall be included in the required design -level <br />geotechnical report(s) and implemented during construction. These <br />measures could include retaining structures to stabilize channel <br />margins, use of deep foundations, removal or improvement of <br />liquefiable soils, and/or the use of relatively rigid foundations. <br />GEO-3C. The Project could result in a significant impact <br />S GEO-3C. Settlement of the existing fill and Bay Mud could have LTS <br />related to development on unstable geologic units and <br />adverse effects on shallow foundations, underground utilities, <br />soils or result in subsidence or collapse. <br />pavements, and other improvements. Options to mitigate these <br />effects include use of shallow ridged foundations for smaller <br />structures, supporting larger structures with deep foundations such <br />as driven piles, and installing flexible connections for utilities. Pre - <br />loading consolidation (surcharging) prior to construction of new <br />improvements could also be considered. The recommendations for <br />both special foundations and other geotechnical engineering <br />measures specified in project specific geotechnical reports shall be <br />implemented during design and construction. <br />GEO-4. The Project could create substantial risks to <br />S GEO-4. The Project geotechnical engineer shall make specific LTS <br />property as a result of its location on expansive soil, as <br />recommendations for mitigation of expansive soils under pavements <br />defined by Section 1803.5.3 of the California Building <br />and structures, including techniques such as capping expansive soils <br />Code. <br />with a layer of non -expansive fill, or by lime treatment. Typical <br />mitigation measures for pavements could include special pavement <br />design, lime treatment of subgrade soils and/or sub -excavation of <br />expansive soils and replacement with non -expansive fill. These <br />recommendations shall be based on testing of the in -site fill <br />