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Re~~~Qn,~'es to <br />Environmental C~he~~klist <br />For CEQA Compliance <br />rosion re ers to t e remova o soi rom expose edrock su aces by water or win he a ects o <br />erosion are intensified with an increase in slope, the narrowing of runoff channels and by the removal of <br />groundcover, which leaves the soil exposed. Construction operations for the proposed project would <br />require excavation of onsite soils. The uncovered soils on the project site could potentially result in erosion <br />and sedimentation impacts to onsite and offsite drainage facilities. This potential impact could increase <br />during periods of rain. To minimize potential erosion impacts, the proposed project would be required to <br />employ the following Best Management Practices during construction operations. <br />Mitigation Measure <br />Prior to the issuance of grading permits, the project developer shall provide proof of coverage <br />under NPDES General Construction Activity Storm Water Permit that includes: (a) A copy of the <br />project's permit issued by the State Water Resource Control Board that identifies the permit <br />number, (b) Two copies of the Storm Water Pollution Prevention Plan. <br />Submit and have approved a surface drainage/utility plan that depicts all applicable "Site Design" <br />structural "Source Control" and "Treatment Control" Best Management Practices (BMPs) in <br />accordance with the Orange County Drainage Area Management Plan (DAMP) and the City of <br />Santa Ana Local Implementation Plan (LIP). <br />Submit for approval a surface drainage/grading/erosion control plan. The plan is to include <br />existing and proposed elevations at and adjacent to all property lines. Drainage routed to the <br />street must be directed beneath the sidewalk and through the curb. <br />C. Would the project result in the loss of a unique geological feature? <br />No Impact <br />According to the City's General Plan Land Use Element EIR, the project site does not contain any unique <br />geologic features. Therefore, implementation of the proposed project would not result in adverse impacts <br />to any unique geologic feature. <br />D. In the project located on strata or soil that is unstable or that would become unstable as a <br />result of the project and potentially result in on-or off-site landslide, lateral spreading, <br />subsidence, liquefaction or collapse? <br />Less Than Significant Impact <br />According the City's General Plan Land Use Element EIR, the project site is located on soils that have low <br />shrink/swell potential, high corrosion potential to uncoated steel and low corrosion potential to concrete. <br />The soil conditions on the project site would not provide a constraint that would prevent the development <br />of the proposed project. As part of the City's development review process a geotechnical study would be <br />prepared to identify geotechnical design recommendations to ensure the long-term geotechnical stability <br />of the project site. <br />E. Where sewers are not available for the disposal of wastewater is the soil capable of <br />supporting the use of septic tanks or alternative wastewater disposal systems? <br />No Impact <br />The project site is an improved building site with an improved sewer system. In terms of geological <br />stability, the project will not require the expansion of additional sewer facilities. <br />3 ~,/~~4 6 <br />