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Copper levels of nearly 500 mg l -1 were measured in aqueous extracts of soil and sediment samples from the lowlands of Antofagasta. Arsenic levels of up to 183 mg l -1 were found in river sediments, and 27.5 mg l -1 arsenic was found at the location of a dam where potable water is extracted. This indicates that the arsenic contamination of water supplies reported...
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