The City of Paramount, as the Lead Agency, for the AltAir Renewable Fuels Conversion Project (Project), prepared and certified the Final Subsequent Environmental Impact Report (SEIR) for Conditional Use Permit No. 757 – AltAir Renewable Fuels Conversion Project pursuant to the California Environmental Quality Act (CEQA) as part of their April 11, 2022 approval of the project. The Final SEIR analyzed the complete conversion of the Paramount crude oil refinery into a renewable fuels production facility, eliminating the refining of crude oil. The Project proposes facility modifications which include a new Pretreat Unit, modifications to the existing Renewable Fuels Unit A, a new Renewable Fuels Unit B, a new Hydrogen Generation Unit, a new Hydrogen Recovery Unit, a new Propane Recovery Unit, upgrades to the existing wastewater treatment system, a new Hydrogen Sulfide Recovery Unit, a second Sour Water Stripper, a new flare, modifications to the truck and rail loading/unloading racks, and new pipelines within the refinery. Some existing tanks would be upgraded/repaired and permitted to handle different products (e.g., non-edible vegetable oils and beef tallow). The Project would also include utilizing two existing 55,000-barrel storage tanks at the Lakewood Tank Farm, and would also relocate several buildings on-site and provide temporary buildings for the demolition and construction process. A South Coast AQMD Rule 1166 Site Specific VOC-Contaminated Soil Mitigation Plan is included to address air quality impacts during construction.