01308oam 2200385 a 450 991070142780332120120229154143.0(CKB)5470000002418802(OCoLC)56359727(EXLCZ)99547000000241880220040826d2002 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierWastewater technology fact sheet[electronic resource] rock media polishing filter for lagoons[Washington, D.C.] :U.S. Environmental Protection Agency, Office of Water,[2002]1 online resource (4 unnumbered pages)Title from title screen (viewed Aug. 26, 2004)."September 2002.""EPA 832-F-02-023."Includes bibliographical references.Wastewater technology fact sheet SewagePurificationFiltrationUnited StatesSewagePurificationFiltrationUnited States.Environmental Protection Agency.Office of Water.GPOGPOOCLCQGPOBOOK9910701427803321Wastewater technology fact sheet3479932UNINA