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UFC 3-280-02A Hazardous Waste Land Disposal/Land Treatment ...

UFC 3-280-02A Hazardous Waste Land Disposal/Land Treatment ...

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10-1. Cost Elementsa. Cost elements for hazardous waste facilitiesare based on a number of variables, including:• Regional hydrogeologic setting• Condition of the existing facility• Local construction costs• Available water quality dataBecause of the number and complexity of the variablesgoverning costs, the analysis is limited to typicalhazardous waste land disposal/land treatment facilities,namely lined units.b. Cost elements for lined hazardous wasteunits include materials costs for liners, underdrainsystems, and ground-water monitoring wells; andinstallation costs, including the costs of necessaryequipment and labor. Since there will be considerablevariation between projects, however, a number of factorsmust be considered in estimating the capital cost of alined hazardous waste unit.(1) Type of liner material. Liner materialcosts can vary significantly, depending on the type ofliner installed, the required thickness of the liner and, inthe case of synthetic liners, whether they are reinforcedor not. Liner type will also influence installation costs.For example, seaming methods for synthetic liners(solvent, heat or contact adhesive) may differ dependingon the liner material selected; preparation of the linerbase is also different for soil liners than for syntheticmembranes.(2) Location of the facility. The location ofthe hazardous waste unit can affect both the cost oflabor and the delivery cost for materials. Materials costscan also be affected by the facility location, depending onthe availability of needed soils and aggregates.(3) Facility size. The size of the waste unitto beCHAPTER 10COST ANALYSISTable 10-1.SUMMARY OF UNIT COSTS FOR LINED FACILITYTM 5-814-7lined can have a significant effect on unit costs.Polymeric membranes and natural soil materials areusually sold at a discount when purchased in largequantities.(4) Site conditions. The soil types,topography and configuration of a site can influence linerinstallation costs. Preparation of the liner base isessential to liner effectiveness and integrity; the easewith which the base can be prepared will depend on siteconditions. Whether soils for liners and earthwork mustbe imported (at higher cost) will also depend on siteconditions.(5) Economic factors. The cost ofsynthetic liners depends, to a large extent, on the cost ofthe petroleum used in their manufacture. Market supplyand demand will also influence the cost of liner materials.10-2. Unit Costsa. Unit costs for various elements of ahazardous waste facility are presented in table 10-1.b. The costs presented in table 10-1 arebased upon standard building cost references, bid pricesand telephone inquiries to material suppliers. Unit costshave, in general, been expressed in ranges to accountfor the variation likely to occur from site to site. Inestimating the cost of a specific hazardous waste unit,the designer should consider the preliminary designcriteria as well as any site-specific factors which wouldinfluence the cost of materials or installation.Contingency and wastage factors should be added to thecost of installation, to account for adverse weather, seamoverlap requirements, and other such considerations;soil shrinkage and compaction should also be factoredinto the cost analysis.Element1983 CostsExcavation $1.50/yd 3(including clearing and grubbing)Earthfillberms and levees $2.00/yd 3soil liners $3.00/yd 3Soil Importsand (gradation for drainage) $10.00/yd 3drainage rock (rounded) $10.Oyd 3(cost delivered)Soil Placementsand $1.00/yd 3Vegetationmulch and hydroseed$1,000/acreFilter Cloth $0.75-1.50/yd 2CANCELLED10-1

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