75B - PH 1501 W MACARTHUR BLVD - Laserfiche WebLink

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Responses to Environmental Checklist For CEQA Compliance rosion re ers to the removal o soi rom exposed be roc su aces y water or win e e ects o erosion are intensified with an increase in slope, the narrowing of runoff channels and by the removal of groundcover, which leaves the soil exposed. Construction operations for the proposed project would require excavation of onsite soils. The uncovered soils on the project site could potentially result in erosion and sedimentation impacts to onsite and offsite drainage facilities. This potential impact could increase during periods of rain. To minimize potential erosion impacts, the proposed project would be required to employ the following Best Management Practices during construction operations. Mitigation Measure Prior to the issuance of grading permits, the project developer shall provide proof of coverage under NPDES General Construction Activity Storm Water Permit that includes: (a) A copy of the project's permit issued by the State Water Resource Control Board that identifies the permit number, (b) Two copies of the Storm Water Pollution Prevention Plan. Submit and have approved a surface drainage/utility plan that depicts all applicable "Site Design" structural "Source Control° and "Treatment Control" Best Management Practices (BMPs) in accordance with the Orange County Drainage Area Management Plan (DAMP) and the City of Santa Ana Local Implementation Plan (LIP). Submit for approval a surface drainage/grading/erosion control plan. The plan is to include existing and proposed elevations at and adjacent to all property lines. Drainage routed to the street must be directed beneath the sidewalk and through the curb. C. Would the project result in the loss of a unique geological feature? No Impact According to the City's General Plan Land Use Element EIR, the project site does not contain any unique geologic features. Therefore, implementation of the proposed project would not result in adverse impacts to any unique geologic feature. D. Is the project located on strata or soil that is unstable or that would become unstable as a result of the project and potentially result in on-or off-site landslide, lateral spreading, subsidence, liquefaction or collapse? Less Than Significant Impact According the City's General Plan Land Use Element EIR, the project site is located on soils that have high shrink/swell potential, possible corrosion potential to uncoated steel and low corrosion potential to concrete. The soil conditions on the project site would not provide a constraint that would prevent the development of the proposed project. As part of the City's development review process, a geotechnical study would be prepared to identify geotechnical design recommendations to ensure the long-term geotechnical stability of the project site. E. Where sewers are not available for the disposal of wastewater is the soil capable of supporting the use of septic tanks or alternative wastewater disposal systems? No Impact The project site is an improved building site with an improved sewer system. In terms of geological stability, the project will not require the expansion of additional sewer facilities. 75~3~6 6