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Figure V-5.12: Typical Bioretention <br />Provide a 1" drop <br />from the edge of <br />pavement <br />BSM bottom width <br />Edge of varies, 1' minimum <br />pavement Overflow structure <br />nr—„ —f or Flow path <br />2"wcodchip mulch luilllii��� - - <br />oraggregate _ <br />Notes: <br />1. Scarify subgrade 3" min. before <br />bioretention soil installation <br />2. Compact BSM to 85%perASTM <br />1577 <br />Provide a 1" drop <br />from the edge of <br />sidewalk <br />Minimum separation varies, <br />see design guidance <br />Sidewalk <br />--11 -� 2" woodchip mulch <br />—ur- or aggregate <br />3" coarse compost <br />in ponding area <br />18' Biomtention Soil Mix <br />(BSM) <br />Seasonal high water table, bedrock, <br />or other impervious layer <br />NOT TO SCALE <br />Typical Bioretention <br />Revised January 2019 <br />DEPARTMENT OF <br />ECOLOGY Please see htiip9/www.scy.wa.gov/copydghthimf for copyright notice including permissions, <br />State of Washington limitation of liability, and disclaimer. <br />2019 Stormwater Management Manual for Western Washington <br />Volume V - Chapter 5 - Page 776 <br />