Well system, used for recovering light non-aqueous phase liquid from groundwater, comprises sealed wells with well filters at different depths

摘要

Well system comprises sealed wells (10, 11) with well filters (12, 13) at different depths. The relative position of the well filters is such that the higher filter (12) is present in the groundwater meniscus region and comprises the light non-aqueous phase liquid from the groundwater meniscus region and the lower filter (13) comprises primarily the groundwater. Preferred Features: The well (10) is formed as the outer well and the well (11) is formed as the inner well, with both wells arranged coaxially and telescopically to each other. The well filter (12) is resistant to the light non-aqueous phase liquid, and is formed as a high grade steel wound wire filter and the well filter (13) is formed as a plastic filter.