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For the foregoing reasons and the reasons discussed in the DEIR and the Initial Study, impacts associated <br />with this issue would be less than significant, and no mitigation is required. (Initial Study, pp. 41-42.) <br />This conclusion also applies, for the same reasons, to the Modified Project. <br />9.9.4 Flooding <br />Threshold: Would the Project substantially alter the existing drainage pattern of the site or area, <br />including through the alteration of the course of a stream or river, or substantially increase the rate or <br />amount of surface runoff in a manner that would result in flooding on- or off -site? <br />Finding: Less than significant impact. (DEIR, p. 2-7; Initial Study, p. 42.) <br />Facts in Support of Finding: The Project site does not include a stream, river, creek, or other water body. <br />The closest water body is the Santiago Creek, which is located approximately 130 feet to the north of the <br />site within Santiago Park, and would not be disturbed by the Project. The Project site is largely impervious, <br />as it is generally covered by pavement or the building structure. Redevelopment of the site would provide <br />for a similar amount of impervious surface; thus, the rate or amount of surface runoff would not <br />substantially increase with implementation of the Project. In addition, the Project includes redevelopment <br />of the existing onsite drainage system to provide infiltration basins, storm drains, and catch basins that <br />would retain and filter runoff prior to discharge into the existing storm drains in N. Main Street and <br />Edgewood Road. Thus, the Project would not substantially alter the existing drainage pattern on the site <br />or in the area, or substantially increase the rate or amount of runoff that could result in flooding. <br />For the foregoing reasons and the reasons discussed in the DEIR and the Initial Study, impacts associated <br />with this issue would be less than significant, and no mitigation is required. (Initial Study, pp. 41-42.) <br />This conclusion also applies, for the same reasons, to the Modified Project. <br />9.9.5 Water Runoff <br />Threshold: Would the Project create or contribute runoff water which would exceed the capacity <br />of existing or planned stormwater drainage systems or provide substantial additional sources of polluted <br />runoff? <br />Finding: Less than significant impact. (DEIR, p. 2-7; Initial Study, pp. 42-43.) <br />Facts in Support of Finding: As discussed above, the Project site is largely impervious, and <br />redevelopment of the site would not substantially increase impervious areas, such that an increase in runoff <br />would occur. In addition, the Project would redevelop the existing onsite storm water drainage system, <br />which would convey runoff from buildings and paved areas to infiltration basins, storm drains, and catch <br />basins that would retain and filter storm water prior to discharge into the existing storm drains in N. Main <br />Street and Edgewood Road. Overall, redevelopment of the Project site would not result in an increase in <br />runoff that would exceed the capacity of the existing City storm drain system. <br />For the foregoing reasons and the reasons discussed in the DEER and the Initial Study, impacts associated <br />with this issue would be less than significant, and no mitigation is required. (Initial Study, pp. 41-42.) <br />This conclusion also applies, for the same reasons, to the Modified Project. <br />Resolution No. Page 40 of 76 <br />Certification of the Magnolia at the Park EIR <br />