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The contractor has requested permission to use cover material that contains limestone or dolomite. Should I be concerned?

April 26, 2017concerned contractor cover Dolomite Limestone material permission requested

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The contractor has requested permission to use cover material that contains limestone or dolomite. Should I be concerned?

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Calcium and magnesium can leach from cover material and exchange with the sodium ions in the sodium bentonite used in GCL thus reducing its efficiency. As a general guideline, CETCO does not recommend calcium-rich cover materials.