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DRAFT [TENTATIVE] WASTE DISCHARGE REQUIREMENTS ORDER R5-2023-00XX 12 <br />FORWARD, INC. <br />FORWARD LANDFILL <br />SAN JOAQUIN COUNTY <br />would require a site-specific demonstration project and approval of the LEA with <br />concurrence by CalRecycle. <br />Surface Impoundments <br />30.Liquid wastes will be discharged to one of two existing surface impoundments <br />(WMU F North and WMU F West) and two proposed Class II surface <br />impoundments (WMU F South and WMU F East). See Table 1 for additional <br />information regarding existing and proposed surface impoundments as well as <br />Attachment G for locations. If leachate production exceeds impoundment <br />capacity at any impoundment, excess leachate will be contained in temporary on- <br />site, aboveground tanks. No liquids generated offsite will be discharged to the <br />impoundments without prior approval of the Central Valley Water Board. <br />Discharges to Class II surface impoundments may include the following: <br />a.Leachate from the landfill units and surface impoundments; <br />b.Landfill gas (LFG) condensate from the LFG extraction system; <br />c.Impacted storm water runoff from the landfill and associated facilities; <br />d.Cannery rinse water; and/or <br />e.Other liquid wastes that are compatible with the liner system and <br />approved by Board staff. <br />All Class II surface impoundment LCRSs are required to be tested annually. <br />31.Facility Specification C.6 requires that the Discharger operates the Class II <br />impoundments so that on October 15 of each year a freeboard of at least 4.74 <br />feet and 5.53 feet in WMU F North and WMU F West, respectively. This <br />corresponds to two feet plus the calculated rise in liquid level associated with an <br />average annual storm season according to the ROWD/JTD. Title 27 sections <br />20320, subdivision (e), and 20375, as well as the accompanying Table 4.1,1 <br />require the Class II surface impoundment to be sited and designed to a 1,000- <br />year, 24-hour storm event. <br />32.The Discharger proposed additional surface impoundments, WMU F South and <br />WMU F East, for the Facility. The Discharger must submit design <br />reports,Construction Quality Assurance (CQA) plans, and CQA reports for <br />1 Title 27, div. 2, subd. 1, ch. 3, subch. 2, art. 4, tbl. 4.1.