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Forward Landfill – SIR 1 www.scsengineers.com 1 EXECUTIVE SUMMARY Senate Bill 1383, effective January 1, 2022, is a statewide effort to reduce emissions of short-lived climate pollutants. The law specifically set the following goals:  A 50% reduction in the level of the statewide disposal of organic waste from the 2014 level by 2020.  A 75% reduction in the level of the statewide disposal of organic waste from the 2014 level by 2025. Table 1 includes the estimated percentage of organic waste disposal based on the 2014 statewide waste characterization study prepared by the Department of Resources, Recycling and Recovery (CalRecycle) for San Joaquin County. Table 1 – 2014 Waste Composition San Joaquin County Organics Inorganics Percentage 67% 33% Based on the 2014 statewide study, approximately 67% of the waste stream in San Joaquin is made up of organics. The 2014 tonnage at the Forward Landfill (Forward/Landfill/Site), reported to CalRecycle, was 811,292 tons; based on the statewide study, it is assumed that 543,566 tons of the waste intake were organics. In accordance with Section 39730.7(a) of SB 1383, the 50% and 75% organics diversion by jurisdictions required by 2020 and 2025, respectively, are based on the statewide disposal of organic waste from the 2014 levels. Therefore, per SB 1383, this would equate to an estimated reduction upstream of the Landfill to 33.5% organics fraction in 2020 and 16.75% organics fraction in 2025. The 2019 disposal tonnage of 889,819 tons (from CalRecycle records) is the most recent tonnage available prior to the implementation of SB 1383. For 2020, there were no observed impacts to waste volumes as a result of organics diversion requirements occurring upstream. For 2025, based on a 75% organics diversion upstream of approximately 407,674 tons, the potential reduced waste intake at the Site would be approximately 641,891 tons in 2025, which equates to 755,166 cubic yards (CY) based on a site-specific Airspace utilization factor (AUF) of 0.85 tons per CY (tons/CY) per the 2021 Joint Technical Document (JTD). The primary impact experienced by the Landfill due to the reduction of organic waste disposal is a potential decrease in future waste disposal tonnages compared to previous projections. A decrease in tonnage impacts the airspace consumed, which allows for longer site life, delay in expansions to the landfill gas (LFG) system and Site closure from previously estimated timeframes. Note that this report assumes that the reduced disposal tonnages due to upstream organics diversion are not replaced by other waste streams by the Site. Impacts to the Landfill noted in this report will change should these diverted tonnages be replaced by other waste streams. The actual disposal tonnage is influenced by many factors outside the control of the Landfill; such as operations at other regional landfills and transfer stations, nature of the wastes, waste generation rates, waste diversion rates, development activity in the region and consumer behavior.