TABLE OF CONTENTS See attenuation.
Soil heaping.
A technique for the in situ treatment of contaminated land. Water is applied to the soil and collected in drains or pumped from wells thereby flushing or leaching some of the contaminants out of the soil. Chemicals, such as surfactants or miscible solvents, may be added to enhance release of the contaminants. Compare soil washing.
In the UK, the acceptable concentration of a contaminant in soil, based on the assessment of the risks posed to human health from exposure to the contamination resulting from land use. They have been derived using the CLEA (Contaminated Land Exposure Assessment) model according to three typical land uses: residential (with and without vegetable growing), allotments and commercial/industrial. Various reports (SGV reports) are published on various soil contaminants.
A treatment technique for contaminated soil in which the soil is placed in large mounds. Air is then pumped into the mound to assist bioremediation. It is the use of aerated static piles ( see Figure A.4) for the bioremediation of contaminated land. Compare landfarming (1).
Soil flushing.
The difference between the field capacity of a soil and the actual moisture level in the soil. The drying out of soil occurs when the loss of water by evapotranspiration is greater than rainfall.
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