> Sir, you have mentioned in example 14 that we can estimate the moles of calcite, dolomite and Cation exchange sites in the aquifer per liter of water. Sir how can we find out the number of cation exchange sites. Is it by multiplying the CEC of clay with the weight of rock per liter of solution? Kindly help me in this regard. Yes. The number you want is the number of equivalents of exchange sites per liter of water. David Parkhurst (dlpark@xxxxxxxx) U.S. Geological Survey Box 25046, MS 413 Denver Federal Center Denver, CO 80225
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