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4.8 – Water Draft Environmental Impact Report February 2021 14800 W. Schulte Road Logistics Center 4.8-9 Additionally, the Project would involve the development of three infiltration basins and a septic tank/leech field system. The infiltration would allow for stormwater runoff collected on the Project to infiltrate into soils and recharge the underlying aquifer. Similarly, the septic tank and leech field system would allow for a portion of the Project’s water use to be returned to the underlying aquifer. Given that the Project would not substantially decrease groundwater supplies or interfere with groundwater recharge, the Project would not impede sustainable groundwater management of the basin. Impacts would be less than significant. Threshold C: Would the Project conflict with or obstruct implementation of a water quality control plan or sustainable groundwater management plan? Less-than-Significant Impact. The Project would comply with applicable water quality regulatory requirements, including implementation of a Storm Water Pollution Prevention Program, stormwater BMPs, and Low Impact Development design, which would minimize potential off-site surface water quality impacts. With respect to groundwater management, the Project would comply with applicable water quality regulatory requirements, including implementation of a SWPPP, stormwater BMPs, and LID design, which would minimize potential off-site surface water quality impacts and contribute to a reduction in water quality impacts within the overall watershed. In addition, with compliance with these regulatory requirements, the Project would reduce potential water quality impairment of surface waters such that existing and potential beneficial uses of key surface water drainages throughout the watershed. With respect to groundwater management, the Project would not substantially deplete groundwater supplies or interfere substantially with groundwater recharge. The Project would be within the jurisdiction of the County of San Joaquin GSA, which is in the process of developing a GSP with the other GSAs within the Tracy Subbasin. The Tracy Subbasin GSP is currently being drafted and is expected to be adopted prior to January 31, 2022. The GSP is expected to identify a water budget for the Tracy Subbasin, goals to achieve sustainability of the Tracy Subbasin’s groundwater resources, and projects and actions to continue the reliability of the region’s groundwater supplies. The GSP is not anticipated to result in site-specific water use restrictions that the Project could conflict with. On the contrary, the GSP is expected to develop and implement projects that would increase recharge of the Tracy Subbasin. Given that these are collaborative planning efforts that would occur at the agency level, the Project would not interfere with the future GSP, Impacts would be less than significant. Threshold D: Would the Project result in cumulatively considerable impacts relating to water or groundwater? Less-than-Significant Impact. The Project would involve the use of groundwater supplies that would be sourced from on-site water wells. A Water Source Assessment was prepared to evaluate the reliability and availability of the Project’s water supplies and determined that existing groundwater conditions are sufficient to supply the demands for the Project even during multiple dry years. 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 cumulative development. In addition, the Project would not substantially decrease groundwater supplies or interfere with groundwater recharge or interfere with sustainable groundwater management of the Tracy Subbasin. On the contrary, the GSP is expected to develop and implement projects that would increase recharge of the Tracy Subbasin, negating possible effects of cumulative development on groundwater supplies. Further, the Project would involve the development of three infiltration basins and a septic tank/leech field system. The infiltration would allow for stormwater runoff collected on the Project to infiltrate into soils and recharge the underlying aquifer. Similarly, the