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J � • " Yt Yy 4` yj r ! 'A Q Alternative Boundaries in ItSolid Waste Management by P. A. Domenico and V. V. Palciauskasa I i t I ABSTRACT constitute a semiquantitative measure of the dilution Recent trends in solid waste management seem to Potential of waste sites prior to intensive investigations For favor the establishment of minimum performance criteria compliance and regulatory purposes,a simple model for for waste facilities, as opposed to case by case detailed maximum concentration predictions is dei eloped for one- operational requirements This implies some generally dimensional steady flow and dispersion in directions acceptable sipper limit of contamination,say as provided by perpendicular to the flow path This model is reasonably the primary and secondary Maximum Conceatratiota Level operational with a minimum of data in that it avoids (AICL's)developed by the Environmental Protection Agency chemical reaction and the inherent fitted parameter known Not so easily defined is the compliance point iLt which the as longitudinal dispersion,and employs the actual measured ICL's may be applied, which can range from the solid waste concentrabon at the solid waste boundary as a boundary boundary (a containment option) to some alternative condition The model thus provides a conservative esamate boundary outside the actual waste facility (a retardation of whether or not minimum performance standards kill be ' opfion) In either cue, it follows that any contaminant achieved at an alternative boundary migration into the public domain beyond the acceptable boundary must enter below the MCL The containment INTRODUCTION option would appear to be stncrly a matter of engineering ' design of the waste facility With the retardation option, The recent proliferanon of environmental protection laws seems to coincide in time with a however, there is need for a simplified procedure for assess- merit of the hydrogeologic environment responsible for corresponding proliferation of transport models retardation and attenuation of the contaminant stream with a predictive capability for environmental These are largely dilution and reaction processes In this impact The literature demonstrates numerous paper,some mechanisms of dilution are examined, including site-specific studies, especially with regard to geometrical spreading of a contaminant plume, recharge' radionuclide transport and cert sin heavy metal from precipitation, and mixing with surface-water bodies This analysis focuses on average value calculations that migration (Baetsle, 1969, Cherry and others, 1973, Pinder, 1973) In spite of this available technology, there is still some doubt that the transport model 'Department of Gcology, Univi-rsim of Illinois at is a practical answer to many patrnn sI c�ntamina- Champaign-Urbana, lilinuis 61820 tion problems There are several reasons for this, Received July 1981, rn ised Octobcr 1981,accepted including the cost and time-consuming nature of January 1982 site-specific investigations, the high level of Discussion open until No%cmber 1, 1982 uncertainty in the available data base, and the