Changes

==Design==

==Design==

===Geometry and Site Layout===

===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%.

Gravel beds in which exfiltration systems are installed are typically rectangular excavations with a bottom width between 600 and 2400 mm <ref>Greater Vancouver Regional District. 2005. Stormwater Source Control Design

Guidelines 2005. Prepared by Lanarc Consultants Limited, Kerr Wood Leidal Associates Limited and Goya Ngan</ref>. The gravel beds should have gentle slopes between 0.5 to 1%.

==Performance==

==Performance==