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B. Substantially deplete groundwater supplies or interfere substantially with groundwater recharge such that there would be a net deficit in aquifer volume or a lowering of the local groundwater table level. Q. Have a potentially significant adverse impact on groundwater quality? No Impact The City of Santa Ana receives 66% of its water from underground water supplies, The underground water basin in the City ranges from -50-feet to +40-feet above sea level. Presently, the City pumps underground water from 21 water wells. Fourteen of the water wells pump ground water into small surface reservoirs. The remaining seven water wells pump underground water into the City's distribution system. Approval of the proposed amendment to the Municipal Code to establish a zoning ordinance for a Specific District and any subsequent construction according to this zoning document would not result in adverse impacts to underground water supplies or prevent the recharge of underground water supplies, in that approval of the proposed ordinance would not involve any activities that would impact underground water supplies or provide impervious surfaces that would prevent the recharge of underground water supplies. Addi tionally, Big Box retail uses would not be permitted in areas where underground water recharge occurs, C. Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of stream or river, or substantially increase the rate or amount of surface runoff in a manner, which would result in flooding on or off-site? D. Create or contribute runoff water which would exceed the capacity of existing or planned storm water drainage systems or provide substantial additional sources of polluted run-off? L. Result in increased impervious surfaces and associated runoff? M. Create a significant adverse environmental impact to drainage patterns due to changes in runoff flow rates or volumes. No Impact 753~iR9