description_raw: See plans for details. Permitted system&nbsp;to use drip dispersal and "Best Available Treatment (BAT)", installer must be certified by MDE and the treatment unit vendor. Septic contractor to also have MDE Sand Mound Installer certification or demonstrate previous experience with drip systems; and be approved by American Manufacturing Company. American Manufacturing Company to be present for the system start -up. The Maryland Department of the Environment recommends septic tanks, BAT and other pretreatment units be pumped at a frequency adequate to ensure that solids are not discharged to the disposal area. Starting point of initial absorption system to be surveyed by a registered land surveyor. This property is in category W-6 and / or S-6 where there is no planned community service and an individual system may be installed on an indefinite basis without firm obligation to connect to community system when and if it becomes available.