Rule 15-18-77-5.1.1 - Definitions1. Air Space - the space required between the lid of a septic tank and the bottom of the outlet pipe for the capture of gases generated by the anaerobic bacteria. Vent pipes within the facility or residence plumbing remove these gases from the septic tank.2. Anaerobic - a process that utilizes bacteria that grow only without free dissolved oxygen. They obtain oxygen from breaking down complex organic substances3. Filter - a device used to remove solids from the effluent of a septic tank.4. Access Opening - a resealable opening in the treatment unit that allows for inspection, maintenance and entry if necessary.5. Septic Tank - Water-tight, covered receptacle for treatment of sewage; receives the discharge of sewage from a building, separates settleable and floating solids from the liquid, digest organic matter by anaerobic bacterial action, stores digested solids through a period of detention, allows clarified liquids to discharge for additional treatment and final dispersal, and attenuates flows.6. Synthetic Fiber Reinforcement - Synthetic fibers of polypropylene or polypropylene/polyethylene blend used in place of welded wire or other accepted reinforcing materials for the purpose of providing structural integrity to concrete.15 Miss. Code. R. 18-77-5.1.1