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===Site Topography===
===Site Topography===
Systems cannot be located on natural slopes greater than 15 %. The gravel bed should be designed with gentle slopes between 0.5 - 1 %.
Systems cannot be located on natural slopes greater than 15 %. The gravel bed should be designed with gentle slopes between 0.5 - 1 %.
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+==Design==
+===Geometry and Site Layout===
+Gravel beds in which exfiltration systems are installed are typically rectangular excavations with a bottom width between 600 and 2400 mm (GVRD, 2005). The gravel beds should have gentle slopes between 0.5 to 1%.
==Performance==
==Performance==