Periodically when an owner is in the beginning stages of building a new home, they will find that their lot has to be demucked before construction. The muck is a layer beneath the topsoil usually consisting of bay bottom silt or organic material that decomposed over time from buried mangroves. This soil is an unstable material, and a soil engineer will determine whether or not it has to be removed or re-compacted. When the muck is removed, it is replaced with a compactable fill or sand material that is installed in 12-inch lifts that are compacted between each lift. After all of the muck has been replaced with compactable fill/sand you are ready to start your building pad.