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4.8 – Water Draft Environmental Impact Report February 2021 14800 W. Schulte Road Logistics Center 4.8-8 4.8.3 Thresholds of Significance The significance criteria used to evaluate the Project impacts with regard to water are based on the portions of the hydrology and water quality and utilities and service systems sections of Appendix G of the CEQA Guidelines that pertain to water supplies. According to Appendix G of the CEQA Guidelines, a significant impact related to utilities and service systems would occur if the Project would: A. Not have sufficient water supplies available to serve the Project and reasonably foreseeable future development during normal, dry, and multiple dry years. B. Substantially decrease groundwater supplies or interfere substantially with groundwater recharge such that the Project may impede sustainable groundwater management of the basin. C. Conflict with or obstruct implementation of a water quality control plan or sustainable groundwater management plan. D. Result in cumulatively considerable impacts relating to water or groundwater. All other hydrology and water quality and utilities and service systems thresholds were analyzed in the Initial Study (Appendix A) and were not carried forward for further analysis in this EIR. See Chapter 5, Effects Found Not To Be Significant, for additional detail. 4.8.4 Impacts Analysis Threshold A: Would there be sufficient water supplies available to serve the Project and reasonably foreseeable future development during normal, dry, and multiple dry years? Less-than-Significant Impact. Domestic, irrigation, and fire suppression water would be sourced on the Project site through the installation of two on-site water wells. A Water Source Assessment was prepared for the Project to evaluate the reliability and availability of the Project’s water supplies (Appendix G). The Water Source Assessment includes a comprehensive assessment of historical demands and a projection of future demands based on forecasted development of the remaining developable lands within the Tracy Subbasin. According to the Water Source Assessment, the Project is anticipated to result in an average daily water demand of 15,730 gallons and a maximum daily demand of 30,100 gallons per day. The Water Source Assessment found that the existing groundwater conditions are sufficient to supply the demands for the Project even during multiple dry years. In compliance with Chapter 9-1115 of the County Zoning Code, the San Joaquin County Environmental Health Division has confirmed these findings, as part of their duties to ensure that water quality and quantity are adequate to meet the needs of existing, proposed, and planned future development. Impacts would be less than significant. Threshold B: Would the Project substantially decrease groundwater supplies or interfere substantially with groundwater recharge such that the Project may impede sustainable groundwater management of the basin? Less-than-Significant Impact. The Project would involve the use of groundwater supplies that would be sourced from on-site water wells. As discussed within the Water Source Assessment (Appendix G), the Project’s groundwater supplies would be sufficient to supply the demands for the Project, even during multiple dry years, indicating that the Project would not substantially decrease groundwater supplies such that readily availa ble supplies would be exhausted. In compliance with Chapter 9-1115 of the County Zoning Code, the San Joaquin County Environmental Health Division has confirmed these findings, as part of their duties to ensure that water quality and quantity are adequate to meet the needs of existing, proposed, and planned future development.