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Environmental protection sand washing process

Sep 15, 2020 This scrubbing removes hazardous contaminants and con- centrates them into a smaller volume. Hazardous contaminants tend to bind chemically or physically to silt and clay. Silt and clay in turn bind to sand and gravel particles. The soil washing process sepa- rates the contaminated fine soil (silt and clay) from the coarse soil (sand and gravel).

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