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Potentially Less Than Less Than Analyzed Si nificant Significant with Si nificant 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 such 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 addition of impervious ❑ ❑ ❑ ® ❑ surfaces, in a manner which would: i) result in substantial erosion or siltation on-or off-site, ❑ ❑ ❑ ® ❑ ii) substantially increase the rate or amount of surface runoff in a manner which would result in flooding on- ❑ ❑ ❑ ® ❑ or off-site, 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? ❑ ❑ ❑ ❑ ❑ d) In flood hazard, tsunami, or seiche zones, risk release of pollutants due to project inundation? ❑ ❑ ® ❑ ❑ e) Conflict with or obstruct implementation of a water quality control plan or sustainable groundwater management ❑ ❑ ® ❑ ❑ plan? Impact Discussion: a-e) This project has two components.The first is a General Plan designation change from IFF(Truck Terminal)to A/G (General Agriculture).The second is a Conditional Use Permit Application for an agricultural processing facility(Use Type: Industry-Agricultural)to include the construction of a 96,959 square foot two-story building. The majority of the project site is located in the Flood Zone X, 0.2 percent annual chance of flood designations,while a small area is in the Flood Zone X. A referral has been sent to the Department of Public Works, Flood Control Division for comments. If approved,any new developments will have to comply with Development Title Section 9-703 regarding flood hazards. In regard to process water discharge,the Central Valley Regional Water Quality Control Board(CVRWQCB)Waste Discharge Requirements Order R5-2021-0063 permits the fruit processing plant on the adjacent parcel to the west (APN:049-120-65)to discharge process wastewater onto project parcel(APN:049-120-04).The proposed project will also utilize this process wastewater discharge area. This CVRWQCB Order will remain in effect once the agricultural processing project is established, and the proposed project includes an 8-acre wastewater discharge pond to accommodate the process wastewater.The CVRWQCB Order states that approximately 7 million gallons of wastewater will be directed to the wastewater discharge pond annually. No changes to the discharge area or process water amount are proposed with this application. Any changes to the discharge area and process wastewater discharged will be subject to the rules and regulations of the CVRWQCB.The discharge area is planted in alfalfa, and the alfalfa acts as a natural filter for the process water.The applicant states that the discharge water 15 Planning Commission Staff Report, PA-2100295 (GP, SA) 18 Environmental Review