ARCHIVED REPORTS_2001_2 - Laserfiche WebLink

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INFORMATION SHEET FORWARD INC., FORWARD LANDFILL SAN JOAQUIN COUNTY Forward, Inc. owns and operates a waste management facility on Austin Road, seven miles' southeast of the City of Stockton. The south fork of Littlejohns Creek traverses the southern portion of the 157 - acre site. There are 23 existing or proposed waste management units (WMUs) at the facility. Order No. 94-014 classified landfill WMU D-93 and all future units in WMUs D and H as Class II landfills. These waste discharge requirements approve the use of a geosynthetic clay liner (GCL) in place of two feet of compacted clay in the composite liner system for both landfill and surface impoundment waste management units. For landfills units, the GCL design is typically used for those portions of side -slope liners that overlap older landfill units while compacted clay is used for the base liners. The GCL is overlain by a 60 mil HDPE geosynthetic liner, followed by a geocomposite drainage net, and a 1 -foot thick protective operations layer. For surface impoundments, the double linerdesign will use:a.lower composite liner system with a GCL and geomembrane liner overlain by a drainage layer and an upper geomembrane. The Diseh'argermade the demonstrations -required by Section 2510(b) and {,c),of apter -15 to use the alternative liner design. The Discharger demonstrated that the engineered alternative is consistent with the performance goal of the prescriptive standard and affords equivalent protection againstwater quality impairment and that the prescriptive standard is unreasonable, unnecessarily burdensome and will cost substantially more. _ Active WMUs at the facility include Class III landfills, a Class II landfill, one interum Class II surface impoundment for landfill leachat, a Class II landfill dedicated to coal ash disposal, and a soil remediation pad. Inactive units include three Class III landfill WMUs with 'interum cover, one Class II land treatment unit for petroleum contaminated soils which was clean closed, and one Class I landfill (WMU A, formerly a Class II -1 unit) closed under a closure plan approved by USEPA, DTSC and the Board. The older Class III landfill units are lined with four feet of compacted clay. These units are designed so that a portion of their volume is isolated from acidic'landfill leachate: 'This allows'for disposai'ofw to such as contaminated soil which is not a 'designated waste' based on results of a Waste Extraction Test using deionized water, rather than the standard citrate buffer SER r1 u