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M m <br /> X p <br /> > Table 2-2 <br /> �- Summary of Impacts and Mitigation Measures <br /> W Significance Significance <br /> Impacts Before Mitigation Measures After <br /> Mitigation Mitigation <br /> 4.7-4: Risks to People and Structures Resulting from PS 4.7-4: Risks to People and Structures Resulting from Unstable LTS <br /> Unstable Soil Conditions.Soils in the southwest portion of the Soil Conditions.The City shall implement Mitigation Measure 4.72, <br /> project area have a very high clay content and are rated by the described above,to reduce the risks to people and structures resulting <br /> NRCS as highly plastic with a high shrink-swell potential. from unstable soil conditions in the proposed project area. <br /> Therefore,it is possible that expansive soils identified in the <br /> southwest portion of the project area could damage wastewater <br /> collection system,effluent outfall,and recycled water <br /> distribution system pipelines and related structures.Because <br /> expansive soils are located in the southwest portion of the <br /> project area and groundwater levels in the project area are high, <br /> this would be a potentially significant impact. <br /> 4.7-5: Risk of Structural Damage Caused by Corrosive Soils. LTS No mitigation is necessary. LTS <br /> The corrosiveness of project area soils was not tested to <br /> determine whether the soils could cause damage to buried <br /> iv concrete slabs and foundations and buried metal pipes during the <br /> w operation of the proposed project.However,because the City's <br /> engineering design process for the project would ensure the <br /> identification of corrosive soils and the implementation of <br /> project designs that would minimize damage to buried concrete <br /> vslabs,foundations,or buried metal pipes,this impact would be <br /> (D less than significant. <br /> v <br /> 4.7-6:Potential Removal of Mineral Resources.Because sand LTS No mitigation is necessary. LTS <br /> p resources in the project area would not be suitable for aggregate <br /> v mining,the proposed project would result in less-than- <br /> significant impacts to mineral resources. <br /> 0 <br /> 4.8 Paleontological Resources <br /> CD <br /> 0 4.8-1:Disturbance of Paleontological Resources During PS 4.8-1:Disturbance of Paleontological Resources during LTS <br /> C/) Earthmoving Activities.Although no previously recorded Earthmoving Activities.For earthmoving activities at the project <br /> paleontological sites are known to occur at the WQCF site, area,the City will implement the following measures: <br /> D pumping station sites,or within the proposed collection system (1) Before the start of construction activities,construction personnel <br /> and recycled water distribution system pipeline routes, involved with earthmoving activities shall be informed of the <br /> cn <br /> previously undiscovered paleontological resources could be possibility of encountering fossils,the appearance and types of <br /> present in sediments of the Modesto Formation that underlie the fossils likely to be seen during construction activities,and proper <br /> v project area.In addition,fossils have been found at excavations notification procedures should fossils be encountered.This <br /> M in similar soils less than 2 miles from the project area. training shall be prepared and presented by a qualified <br /> CO M <br /> LTS=Less than Significant S=Significant PS=Potentially Significant SU=Significant and Unavoidable <br />