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Risks include: Shallow freshwater aquifer contamination with fracture fluids; surface water contamination by returned fracture fluids; excessive demand on local water supply from fracturing operations; and surface and local community disturbance, due to drilling and fracturing activities.
Then add water, to trigger a chemical reaction with the cement. I asked Juan Esteban Calle Restrepo, the CEO of Cementos Argos , the leading cement producer in Colombia, about that when I sat down with him recently at his office in Medellín. A popular analogy in the industry is that cement is the egg in the concrete cake. He was frank.
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