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*Gravel beds in which exfiltration systems are installed are typically rectangular excavations with a bottom width between 0.6 and 2.4 m <ref>Greater Vancouver Regional District. 2005. Stormwater Source Control Design
*Gravel beds in which exfiltration systems are installed are typically rectangular excavations with a bottom width between 0.6 and 2.4 m <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>.
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 - 1%.
*The gravel beds should have gentle slopes between 0.5 - 1 %.
*Calculate maximum '''[[flow through perforated pipe]]'''
*Calculate maximum '''[[flow through perforated pipe]]'''
===Drawings===
===Drawings===
Standard details for exfiltration trenches have been produced by City of Kitchener and City of Barrie. See [[Drawings]]
Standard details for exfiltration trenches have been produced by City of Kitchener and City of Barrie. See [[Drawings]]