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' WASTE DISCHARGE REQUIREMENTS ` -16- FORWARD INCORPORATED WASTE MANAGEMENT FACILITY CLASS II LANDFILLS CLASS III LANDFILLS CLASS II SURFACE IMPOUNDMENT [LASS II LAND TREATMENT UNIT SAN JOAOUIN COUNTY 52. Areas with slopes greater than ten percent, surface dra1nage.courses= and areas subject to erosion by wind or water shall be designed and constructed to prevent such erosion. Surface Impoundment Closure 53. At closure of surface impoundments, all residual wastes, including liquids, sludges, precipitates, settled solids, and liner materials and adjacent natural geologic materials contaminated by wastes, shall be completely removed and discharged to a WMU approved by the Board. Ifafter reasonable attempts to remove contaminated natural geologic materials, the Discharger demonstrates that removal of all remaining contamination is infeasible, the impoundment shall be closed as a landfill pursuant to Specifications 49 through 52 above. 54. If l) residual wastes are classified as nonhazardous pursuant to Title 22= CCR, Division 4* Chapter 30;'2) containment features of the impoundment meet Class ll landfill construction standards and per- formance goals as defined by Subchapter 15; 3) all liquid waste are removed or treated to eliminate free liquids; and 4) residual moisture does not exceed the moisture -holding capacity of residual wastes (even under closure conditions), a surface impoundment may be closed as a landfill pursuant to Specifications 40 through 52 above after compaction of the residual wastes. C. Provisions: l. The Discharger shall maintain a copy of this Order at the site and make it available at all times to site operating personnel. 2. The Discharger shall notify the Board, in writing, of any proposed change in ownership or responsibility for construction or operation of the WMUs. The Discharger shall also notify the Board of amaterial change in the character, location, or volume of the waste discharge and of any proposed expansions or closure plana not described in these waste discharge requirements. This notification shall be given 80 ' days prior to the effective date of the change and shall be accompanied by an amended Report of Waste Discharge and any technical documents that are needed to demonstrate continued compliance with these WORs. 3. The Discharger shall comply with Monitoring and Reporting Program No. 88-023, which is attached to this Order.