2019-107 - Proposed Addington Multi-Family Residential Project

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City's Municipal Code, which requires appropriate back fill, compaction of soils, and foundation design to ensure stable soils. For the aforementioned reasons, the Project would result in a less than significant impact related to unstable soil or geologic units. In addition, the Project is not located on a geological unit or soil that would become unstable as a result of subsidence. Subsidence is a general lowering of the ground surface over a large area that is generally attributed to lowering of the groundwater levels within a groundwater basin. Subsidence or settlement of the ground can occur as a result of earthquake motion in an area where groundwater in a basin is lowered. Because the Project does not involve groundwater pumping, impacts related to subsidence will not occur as a result of the Project. (Initial Study, p. 32.) This conclusion also applies, for the same reasons, to the Modified Project. 9.6.4 Soil Expansion Threshold: Would the Project be located on expansive soil, as defined in Table 18-1-B of the Uniform Building Code (1994), creating substantial risks to life or property? Finding: Less than significant impact. (DEK p. 2-6; Initial Study, pp. 32-33.) Facts in Support of Finding: The Project would not be located on expansive soil. Expansive soils contain certain types of clay minerals that shrink or swell as the moisture content changes. As described above, the Project site soils consist of silty fine to medium sands with local layers of fine to coarse sands with gravel size rock and some larger rock fragments, which have a low expansion potential. (Initial Study, p. 32.) In addition, as noted above, the Project would be required to have building foundations and pavement areas constructed in compliance with the CBC and the City's Municipal Code, which requires appropriate back fill, compaction of soils, and foundation design to ensure stable soils. Thus, the Project's impacts related to expansive soils would be less than significant. (Initial Study, p. 33.) This conclusion also applies, for the same reasons, to the Modified Project. 9.6.5 Septic Tanks Threshold: Would the Project have soils incapable of adequately supporting the use of septic tanks or alternative wastewater disposal systems where sewers are not available for the disposal of wastewater? Finding: No impact. (DEK p. 2-6; Initial Study, p. 33.) Facts in Support of Finding: The Project site is currently connected to the City's sewer system, and the Project would also connect to existing sewers and would not use septic tanks or alternative wastewater disposal systems. As a result, impacts related to septic tanks or alternative waste water disposal systems would not occur from implementation of the Project. This conclusion also applies, for the same reasons, to the Modified Project. 9.7 Greenhouse Gas Emissions 9.7.1 Greenhouse Gas Emissions Threshold: Would the Project generate greenhouse gas emissions, either directly or indirectly, that may have a significant impact on the environment? Resolution No. Page 34 of 76 Certification of the Magnolia at the Park EIR