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If mitigation implemented will Potentially Significant Impacts Suggested Mitigation Measures impact be less than significant? The project seeks to augment runoff either by pumping water Dry season diversion of water from the Mokelumne Yes from the Mokelumne River or by utilizing groundwater. River for irrigation, under claim of riparian right, should be limited to an amount determined to not adversely affect instream flow requirements or the existing water users. Prior to tentative map approval, the applicant should complete an inventory of existing water uses and instream flow requirements during the summer to determine the amount of water available for summer diversion, and the applicant's equitable share of such water. This inventory should focus on summer flow allocations and environmental impacts from summer flow reduction. This is strongly recommended to compensate for the fact that riparian diversions are not regulated by the state, and there is a clear need l , for some measure of regulation in this case. 00 The applicant's pumping and use of groundwater for Yes the project should be restricted to an amount roughly equivalent to the average annual amount of on-site groundwater replenishment,estimated to be approximately 180 acre-feet per year. The applicant should not utilize groundwater for water level maintenance in the lakes. The applicant should incorporate water conservation Yes measures and other project design modifications,as appropriate,to demonstrate the adequacy of the water supply to meet expected water demands. This should include an itemization of drought planning/contingencymeasures such as: • reducing the overall amount of area to be irrigated(i.e., golf course, vineyard,pasture);