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Summary
| Description | ||||||
| Date | ||||||
| Source | "Technologies for Upgrading Existing or Designing New Drinking Water Treatment Facilities", Document no. EPA/625/4-89/023. p. 36, Figure 4-2. | |||||
| Author | US Environmental Protection Agency | |||||
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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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