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GEO-6 <br /> <br />Erosion control practices shall be employed and maintained on all vacant areas on the <br />project site that have been graded. <br /> <br />Findings for Impact GEO-3. The City finds that the above-identified changes or alterations <br />would reduce the impact identified as GEO-3 to less than significant levels and are herby <br />incorporated into the project. No additional mitigation measures are necessary with the <br />implementation of Mitigation Measures GEO-5 and GEO-6. <br /> <br />Hydrology/Water O, yalit), <br /> <br />Impact HYD-1. Construction activities would result in runoff that would potentially affect water <br />quality. Implementation of the proposed project would result in land disturbing activities such as <br />grading and excavation to develop residential dwelling units and a church facility. These types of <br />construction activities could accelerate the erosion process by loosening the soil, increasing the <br />gradient of land slopes, and altering natural surface runoff patterns. Such changes may increase the <br />erosion rate from the natural rate that existed before the construction activity began. However, it <br />should be noted that the project site currently consists of level-graded agricultural land with limited <br />vegetation. Therefore, the total erosion from the project site after development would be <br />decreased due to the reduction in the area of exposed soft on site. <br /> <br />Mitigation Measure for Impact HYD-1. <br /> <br />HYD- 1 <br /> <br />All proposed drainage improvements, including project catch basins, shall be designed <br />and constructed in accordance with the standards set by the City of Santa Ana and by <br />the Orange County Flood Control District. Plans for grading, drainage, and erosion <br />control shall be reviewed by the City Engineer prior to issuance of grading permits. <br /> <br />Findings for Impact HYD-1. The City finds that. the above-identified changes or alterations <br />would reduce the impact identified as HYD-1 to less than significant levels and are herby <br />incorporated into the project. No additional mitigation measures are necessary with the <br />implementation of Mitigation Measure HYD- 1. <br /> <br />Impact HYD-2. Implementation of the proposed project would modify local drainage patterns <br />through the addition of contiguous areas of impervious surfaces. Additional impervious surfaces <br />would include the driveways for residences, parking lot for the church, and 156 residential <br />dwelling units. Development of the project site as currently planned and as depicted on the <br />Conceptual Drainage Plan is consistent with the City's Master Plan of Drainage and with drainage <br /> <br />13 <br /> <br /> <br />