Information concerning the structural integrity of waste management

units and physical (e.g., structural) controls on waste migration from the

units; and

The chemical composition and character of wastes contained in waste

management units throughout their history, and those wastes expected to

be contained in the units in the future (e.g., waste analyses, leachate

analyses, leachate generation rates, percent solids, and the past, present,

and expected future chemical interaction of the waste and the geologic

and soil units underlying the waste).

Information obtained from a literature review, including:

Reports of academic research (e.g., dissertations and theses) performed

in the area of the site or for the same aquifer(s) at the site;

Journal articles;

Studies, reports, or literature from local or regional offices, such as local

water offices, planning commissions, and health departments;

Studies and reports provided by state geologic surveys or state water or

environmental offices; and

Studies and reports obtained from Federal offices, such as the U.S.

Geological Survey (USGS).

Reports of previous investigations performed at the facility, or nearby facilities

(e.g., the results of any previous sampling and analysis efforts).

Climatic data, including precipitation, wind (direction and velocity), and

evapotranspiration data.

Topographic, geologic, soil, hydrogeologic, geohydrochemical, fracture trace,

and conduit maps and aerial photographs.

Other readily available information, for example:

Records documenting local influences on ground water flow (e.g., on 

or off site pumping wells, irrigation or agricultural use, tidal variations,

river stage variations, land use patterns, local waste disposal practices);

November 1992

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