Laserfiche WebLink
A��I/�uTCAV® <br /> 115- "' Size and Cost Estimate <br /> STORMWATER <br /> SOLUTIONS INC. <br /> Prepared by Joe Reidy on March 7,2007 <br /> Marlene Bissell 10-unit — Stormwater Treatment System <br /> Everett, WA <br /> Information provided: <br /> • Water quality flow, Qwq = 0.06 cfs 2x els 5 gel <br /> 0,/� efS CI�9Pr9crTy <br /> • Presiding agency= City of Everett <br /> Assumptions: <br /> • Media = ZPG cartridges <br /> • Flow rate per cartridge = 15 gpm <br /> • Drop required from inlet to outlet = 2.3' minimum <br /> Size and cost estimates: <br /> The StormFilter is a flow-based system, and therefore, is sized by calculating the peak water quality flow rate <br /> associated with the design storm. The water quality flow rate was calculated by the engineer and provided to <br /> CONTECH Stormwater Solutions Inc. <br /> The StormFilter for this site was sized based on a water quality flow rate of 0.06 cfs. To accommodate this flow rate, <br /> CONTECH Stormwater Solutions Inc. recommends using a steel catch basin StormFilter with 2 cartridges. The <br /> estimated cost of this system is $8,500, complete and delivered to the job site. The contractor is responsible for <br /> setting the StormFilter and all external plumbing. <br /> The catch basin StormFilter has an internal bypass capacity of 1.0 cfs. If the peak discharge off the site is expected <br /> to exceed this rate, we recommend placing a high-flow bypass upstream of the StormFilter system. CONTECH <br /> Stormwater Solutions Inc. could provide our high-flow bypass, the StormGate, which provides a combination weir- <br /> orifice control structure to limit the flow to the StormFilter. The estimated cost of this structure is $4,000. The final <br /> cost would depend on the actual depth and size of the unit. <br /> 02006 CONTECH Stormwater Solutions 12021-B NE Airport Way,Portland OR 97220 Page 1 of 2 <br /> contechstormwater.com Toll-free:800.548.4667 Fax:800.561.1271 <br />