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I <br /> I <br /> specified in the CONTECH Product Design Manual,the flow rate may be adjusted <br /> through the filter cartridges. By decreasing the flow rate through the filter cartridges,the <br /> influent contact time with the media is increased and the water velocity through the <br /> system is decreased, thus increasing both the level of treatment and the solids removal <br /> efficiencies of the filters, respectively(de Ridder, 2002). <br /> Recommended research and development: <br /> Ecology encourages CONTECH to pursue continuous improvements to the StormFilter. <br /> To that end,the following actions are recommended: <br /> 1 • Determine, through laboratorytesting,the relationshipbetween accumulated solids <br /> g g� <br /> and flow rate through the cartridge containing the ZPGTM media. Completed 11/05. <br /> • Determine the system's capabilities to meet Ecology's enhanced,phosphorus, and oil <br /> treatment goals. <br /> • Develop.easy-to-implement methods of determining that a StormFilter facility <br /> requires maintenance(cleaning and filter replacement). <br /> Contact Information: <br /> Applicant Contact: Sean Darcy <br /> Contech Engineered Solutions <br /> 11835 NE Glenn Widing Drive <br /> Portland,OR, 97220 <br /> 503-258-3105 <br /> sdarcy@conteches.com <br /> ' Applicant Web link http://www.conteches.com/ <br /> Ecology web link: http://www.ecy.wa.gov/programs/wq/stormwater/newtech/index.html <br /> Ecology Contact: Douglas C. Howie,P.E. <br /> Department of Ecology <br /> 1 Water Quality Program <br /> (360)407-6444 <br /> Idouglas.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 /> I <br /> CONTECH-StormFilter®GULD Maintenance Update(November 2012) Page 110 <br /> I <br />