Ground water divide

Figure 3. Cross-section showing major hydrogeologic units in the Fox River valley (see Fig. la for location of section A-A j. The regional recharge area for the St. Peter and deep sandstone aquifers occurs between the erosional edge of the Sinnipee and the regional ground water divide (denoted as "B " in figure). Modified from Batten and Bradbury (1996).

The study site was selected so that it would (1) have multilayered soils, (2) have relatively flat topography (to minimize runoff), (3) be of manageable size (less than 20 acres), (4) have a shallow water table, (5) be isolated from domestic wells, (6) be within close proximity of a ground-water divide, (7) be available for a 5-year study, with owner cooperation, and (8) be in a major agricultural area. 

Answers to some of these concerns can be found in the present book, entitled Environmental Impact Assessment of Recycled Wastes on Surface and Ground Waters . This book is an attempt to comprehensively understand the potential impacts associated with recycled wastes. The book is divided into three main volumes, each with specific goals. 

In principle, the water existing on earth can be divided into ground water and surface water. 

Ground waters are divided according to the quality of water suitable for consumption (good status) and water inappropriate for consumption (poor status). Ground waters suitable for... 

The only natural systems likely to be at equilibrium are ground waters that have been in contact with weathering rock for some time, so that base flow streams issuing from them may be saturated with the mineral phases of the regolith. It is, however, relatively easy to establish equilibrium in laboratory experiments with soils and finely divided mineral matter, and it would be necessary to do this to reveal many of the equilibrium systems mentioned above. 

Though a small percentage (0.3%) of the lead consumed is used in electronic assemblies, it could be better recycled. There is very little probability that lead can be leached from landfill into ground water because lead salts are not soluble in water. However, if electronic products are simply shredded and then incinerated, the lead dust from shredding or the ash from the incinerator will be finely divided and more available for environmental contamination. 

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