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OSSF

Séranvillers-Forenville — 50° 07′ 28″ N 3° 16′ 54″ E / 50.1244444444, 3.28166666667 … Wikipédia en Français
Onsite sewage facility — On Site Sewage Facilities (OSSF) are wastewater systems designed to treat and dispose of effluent on the same property that produces the wastewater. A septic tank and drainfield combination is the oldest and most common type of OSSF, although… … Wikipedia
Wastewater — For the lake in Northwestern England, see Wastwater. Public infrastructure … Wikipedia
Septic tank — A septic tank, the key component of a septic system, is a small scale sewage treatment system common in areas with no connection to main sewage pipes provided by private corporations or local governments. (Other components, typically mandated… … Wikipedia
Trickling filter — A trickling filter consists of a fixed bed of rocks, gravel, slag, polyurethane foam, sphagnum peat moss, or plastic media over which sewage or other wastewater flows downward and causes a layer or film of microbial slime to grow, covering the… … Wikipedia