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==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==