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*:/ : 11-1 h WA <br />b) Substantially decrease groundwater supplies or interfere substantially with gmundwater recharge <br />such that the project may impede sustainable groundwater management of the basin? <br />Less Than Significant Impact. The City of Santa Ana, including the replacement park sites are in the Orange <br />County Groundwater Basin, managed by the Orange County Water District. The replacement park sites do not <br />contain any groundwater recharge facility, such as wells of groundwater connections (OCWD 2015). The <br />replacement parks would include water fountains for park users, and such small use of potable water would <br />have negligible impact on groundwater supplies. Implementation of the proposed project would not <br />substantially interfere with groundwater recharge. No significant impacts to the local groundwater table would <br />result from project implementation. Impacts would not be significant, and no mitigation measures are required. <br />c) Substantially alter the existing drainage pattern of the site or area, including through the alteration <br />of the course of a stream or river or through the addition of impervious surfaces, in a manner which <br />would: <br />i) Result in a substantial emsion or siltation on- or off -site? <br />Less Than Significant Impact. The replacement park sites are currently vacant, therefore, susceptible to <br />soil erosion. Development of community parks would provide new drought tolerant landscaping, concrete <br />pavers, decomposed granite walking path, rubber surfaced exercise area, and rock bioswale and drywell <br />storm water capture system to control stormwater so that the proposed project does not increase the <br />stormwater runoff volumes, therefore, it is anticipated that erosion condition would improve with project <br />implementation. Therefore, impacts would be considered less than significant, and no mitigation measures <br />are required. <br />ii) Substantially increase the rate or amount of surface runoff in a manner which would result in <br />flooding on- or offsite? <br />Less Than Significant Impact. <br />6th Street Site <br />The 6th Street Site is within the Federal Emergency Management Agency (FEMA Flood Insurance Rate <br />Map's (FIRM) flood zone X, area of minimal flood hazard. Zone X represents area subject to inundation <br />by the 0.2 percent annual chance flood hazard, areas of 1 percent annual change flood with average depth <br />less than one foot of with drainage areas of less than one square mile (Map ID# 06059CO256J) (FEMA <br />2009). The 6th Street Site is not in the base floodplain, which has a one percent or greater change of <br />flooding in anp given year. <br />Raitt Street Site <br />Raitt Street Site is within the FEMA FIRM flood zone X, zone D overlay. Zone X represents area subject <br />to inundation by the 0.2 percent annual chance flood hazard, area of 1 percent annual change flood with <br />average depth less than one foot or with drainage areas of less than one square mile, and zone D represents <br />area with flood risk due to levee (Map ID# 06059CO257J) (FEMA 2009). As discussed in Section 3.9(i) <br />75C-99 <br />