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Summary
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| Source | "Technologies for Upgrading Existing or Designing New Drinking Water Treatment Facilities", Document no. EPA/625/4-89/023. p. 40, Figure 4-7. | |||||
| Author | US Environmental Protection Agency | |||||
| Permission (Reusing this file) |
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:57, 28 March 2010 | | 2,115 × 1,187 (189 KB) | Moreau1 | == Summary == {{Information |Description={{en|1=Diagram of a housed slow sand filter for water purification}} |Source=[http://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=300048WU.txt "Technologies for Upgrading Exis |
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