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Potentially Less Than Less Than Analyzed Significant Significant with Significant No In The 9 Mitigation 9 Impact Incorporated Impact Impact Prior EIR X. HYDROLOGY AND WATER QUALITY. Would the project: a) Violate any water quality standards or waste discharge requirements or otherwise substantially ❑ ❑ ❑ ❑ degrade surface or ground water quality? b) Substantially decrease groundwater supplies or interfere substantially with groundwater recharge ❑ ❑ a El that the project may impede sustainable groundwater management of the basin? c) Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river or through the ❑ ❑ 11 11addition of impervious surfaces, in a manner which would: i) result in substantial erosion or siltation on-or off- El F-1X F]site; ii) substantially increase the rate or amount of surface runoff in a manner which would result in Elflooding on-or off-site; El iii) create or contribute runoff water which would exceed the capacity of existing or planned stormwater drainage systems or provide ❑ ❑ ❑ ❑ substantial additional sources of polluted runoff; or iv) impede or redirect flood flows? ❑ ❑ ❑ X d) In flood hazard, tsunami, or seiche zones, risk ❑ F] ❑ � 1:1release of pollutants due to project inundation? e) Conflict with or obstruct implementation of a water quality control plan or sustainable groundwater ❑ ❑ ❑ management plan? X 11 Impact Discussion: The proposed project's impact on hydrology and water is expected to be less than significant. The project will be served by the existing onsite well and septic system. The existing services were constructed under permit, and Construction of an individual domestic water well will be under permit and inspection by the Environmental Health Department. The sewage disposal system must comply with the onsite wastewater treatment systems standards of San Joaquin County. Therefore, the proposed project's impact on these resources will be less than significant. The San Joaquin County Department of Public Works will require the applicant pay a Water Supply Facilities Impact Mitigation Fee. The Water Impact Mitigation Fee Program was established to finance San Joaquin County's share of the construction cost for the New Melones Water Conveyance Project, which is intended to mitigate the impact of ground and surface water depletion resulting from new development within the fee area. The fee area includes the unincorporated area of the County within the SEWD and Central San Joaquin Water Conservation District and the area within one-half mile north of the SEWD boundary along Eight Mile Road, between Rio Blanco Road and Alpine Road. The proposed project's impact on ground and surface water will be mitigated with the required Water Supply Facilities Impact Mitigation PA-1900129 (UP)—Initial Study 18