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9 <br /> e <br /> 4aa <br /> WASTE DISCHARGE REQUIREMENTS -18- <br /> FORWARD INCORPORATED <br /> WASTE MANAGEMENT FACILITY <br /> CLASS II LANDFILLS CLASS III LANDFILLS <br /> CLASS II SURFACE IMPOUNDMENT <br /> CLASS II LAND TREATMENT UNIT <br /> CLOSURE OF CLASS I LANDFILL <br /> SAN JOAQUIN COUNTY <br /> 39. The maximum depth of the treatment zone shall not exceed five feet <br /> from the initial soil surface. <br /> 40, Aerated soil from WMU G shall be disposed of as follows: <br /> *TPH Concentration Maximum Benzene Disposal <br /> mq/kg Concentration, mg/kq Alternatives <br /> <100 <0.7 A, B, C, D <br /> >100 <0.7 D, E <br /> * Total Petroleum Hydrocarbon <br /> A = Co-disposal with 'nonhazardous solid waste' <br /> B = Use as daily cover <br /> C = Use as intermediate cover <br /> D = Use as foundation layer of cap at closure <br /> E = Confer with Board regarding possible disposal options or <br /> continue aeration <br /> 41 . Soil piles stored in WMU G shall at all times be completely covered <br /> with a synthetic liner, except during treatment. <br /> 42. Soils containing contaminants other than petroleum hydrocarbons and <br /> BTX (for example, chlorinated hydrocarbons, heavy metals, etc. ) shall <br /> not be placed in WMU G without prior approval of the Board. <br /> 43. WMU G shall be graded so that runoff will collect in a sedimentation <br /> pond dedicated to that unit. Water leaving that sedimentation pond <br /> may be discharged if it does not contain waste. <br /> DRYING OPERATION SPECIFICATIONS <br /> 44. Sludges from water or wastewater treatment plants may be disposed <br /> of by spreading on a one foot thick, compacted clay pad that is <br /> bermed to prevent runoff. Within 48 hours, this waste shall be <br /> disced into the clay pad in such a manner as to allow drying of the <br /> waste with no percolation of liquid through the bottom of the clay <br /> pad. Once the waste has dried, it and any soil it has contacted <br /> shall be moved to WMU D, or WMU H for disposal. The clay pad shall <br /> be rebuilt' to its original thickness after each drying cycle. The <br />