This is a mistake that happened in some areas SE of me.. Bentonite was used where it was not suitable for the soil type and IF you have lean sandy clay there is a much better option. I sealed a 2.2 acre impoundment with lean sandy clay with some areas of sandy loam and our core samples tested came back at less than .030 seep a day, which is the lowest our firms in this location can test for. Terracon is located in wichita, they do our testing. I push this hard because bentonite is a possible candidate but depending on soil type, there is a cheaper, better option.
