File:Rapid sand filter EPA.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	04:17, 25 March 2010		1,987 × 1,489 (430 KB)	Moreau1	{{Information \|Description={{en\|1=Illustration (cutaway view) of rapid sand filter for water purification}} \|Source=[http://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=300048WU.txt "Technologies for Upgrading Exist

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