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Ecology web link: hqp://www.ecy.wa.goy/programs/wq/stormwater/newtech/index.html <br /> Ecology Contact: Douglas C. Howie, P.E. <br /> Department of Ecology <br /> Water Quality Program <br /> (360) 407-6444 <br /> douglas.howie@ecy.wa.gov <br /> Revision History <br /> Date Revision <br /> Jan 2005 Original Use Level Designation <br /> Dec 2007 Revision <br /> May 2012 Maintenance requirements updated <br /> November 2012 Design Storm and Maintenance requirements updated <br /> January 2013 Updated format to match Ecology standard format <br /> September 2014 Added Peak Diversion StormFilter Alternate Configuration <br /> November 2016 Revised Contech contact information <br /> April 2017 Revised sizing language to note sizing based on Off-line <br /> calculations <br /> CONTECH-StormFilter®GULD Maintenance Update(November 2012) Page 112 <br />