Question:I believe that there are two mats in a sewage system; one is a clogging mat and there is an underlying biomat. A saturated clog mat cannot provide treatment as it has no oxygen. A clog mat will result in a more evenly spread effluent through your trench and, therefore, a more even flow through your actual biomat. In sandy soils there will be sufficient air movement to prevent the clog mat from plugging. This won’t happen in finer textured soils. Also, I don’t think that the Long Term Acceptance Rate is a treatment rate. I also think that the
