Question:I installed chambers in a mound system. The soil has pushed up and filled the chambers. The chambers have not sunk because I uncovered all 400 feet and all elevations were okay. Also, the design engineer did a perc test on the mound after the lines were removed in undisturbed soil in the mound, and the soil is rising there also. Does anyone know where I can get information on this?Answers:- I am going to guess it is serious mole action. I now put cloth tightly around my lateral cleanouts because so many of the valve boxes got completely filled
