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bodies. The results of monitoring will be used to assess trends in important water quality parameters, and the <br /> results of that work would be used in the CEQA process and in regulation of future projects/controllable factors <br /> affecting water quality to assure that water quality and beneficial uses are protected in accordance with the <br /> mandates of the CWA and the California Water Code. <br /> All of the project's water quality impacts were determined to be less-than-significant because effluent <br /> concentrations of water quality constituents would either be below existing adopted Basin Plan objectives or <br /> would below levels that have been determined to be protective of water quality. The project and related projects <br /> would be required to comply with NPDES permit limits from the RWQCB,which are, in turn,based on the <br /> lowest criteria determined to be protective of beneficial uses. In consideration of the existing water quality <br /> policies, standards, and programs in place to protect and improve water quality of the San Joaquin River and <br /> Delta and that the project would result in less-than-significant impacts to water quality for all constituents <br /> evaluated,cumulative water quality effects would be less than significant and the project's incremental <br /> contribution would not be considerable. <br /> GROUNDWATER SUPPLY AND QUALITY <br /> The City is a participant in the South San Joaquin Irrigation District(SSJID) South County Surface Water Supply <br /> Project(SCSWSP),designed to ultimately reduce the City's dependence on groundwater resources which have <br /> historically been overdrafted.As a result, it is anticipated that providing potable water needed to serve land uses <br /> associated with the project would result in less-than-significant impacts to groundwater resources. However, <br /> cumulatively significant impacts could occur because of overdrafting or an increase of salinity intrusion resulting <br /> from cumulative groundwater usage by entities other than the City of Manteca. The City of Manteca would <br /> continue to limit its contribution to this impact by limiting its own groundwater usage to what has been <br /> determined to be sustainable levels. Despite the City of Manteca's limitations on its own groundwater usage, <br /> groundwater impacts could be cumulatively considerable because the city cannot be certain that other <br /> groundwater users would similarly limit their own groundwater usage to sustainable levels. Implementation of the <br /> proposed project would contribute to this cumulatively significant impact.No feasible mitigation is available. <br /> SURFACE DRAINAGE <br /> Other projects in the city would be required to construct stormwater conveyance and detention facilities to control <br /> surface runoff. All stormwater management systems constructed to serve individual projects would be required to <br /> comply with the policies of the city's drainage master plans. In addition, cumulative impacts from related projects <br /> would undergo separate environmental review to ensure that adequate stormwater conveyance facilities would be <br /> constructed to serve those projects. Therefore, it is anticipated that future development would result in less-than- <br /> significant cumulative stormwater conveyance impacts. The project would direct stormwater to the on-site <br /> stormwater system at the WQCF and to the neighborhood stormwater systems where proposed wastewater pump <br /> stations would be located. These stormwater facilities could adequately accommodate the minor volumes of <br /> stormwater generated by proposed facilities. As a result, cumulative stormwater impacts would be less than <br /> significant and the project's contribution would not be considerable. <br /> FLOOD CONTROL <br /> The project area is located outside the 100-year floodplain. Therefore,the project would not contribute to a <br /> cumulative increase in flood elevations through the removal of areas from the 100-year floodplain. This would be <br /> a less-than-significant cumulative impact. <br /> 5.3.1 U PUBLIC SERVICES AND UTILITIES <br /> The City of Manteca is responsible for ensuring that water and wastewater services are adequately provided <br /> within its jurisdictional boundaries. The City general plan identifies goals and policies associated with providing <br /> Manteca WQCF and Collection System Master Plans EIR EDAW <br /> City of Manteca 5-17 Cumulative Impacts <br />