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�' Determining Number of
<br /> Stormwater360 Cartridges for Systems
<br /> � ,u����.��� Downstream of Detention
<br /> Determininq Number of Cartridqes for StormFilter Svstems
<br /> Slormwa�er360 En9ineer: EKN
<br /> Dale 1l20I2006
<br /> Site In(ormalfon
<br /> Project Name Silver Lako Ridge
<br /> Projecl Stale Wasbington
<br /> Projecl Localion Everelt
<br /> Drainage Area,Ad 1.31 ac
<br /> Impervious Area,Ai O.B2 ac
<br /> Pervious Area,Ap �•49
<br /> °'o Impervious 63%
<br /> Runolf Coefficient, Rc 0.61
<br /> Upstream Detenlion Syslem
<br /> Peak release rate Irom delen�ion,Q1eb„a�,�„ 0.05 c(s
<br /> Treatmenl release rale from detention,Q,�,i�,,,��,,.,i 0:66-cfs L �; :•! �_ , . - ,
<br /> Delunlion prelrcalment credit 50°/
<br /> (Irom•emoval efficiency calcs)
<br /> Mass loading calcul:�lions
<br /> Mean�nnual Rain�all, P 37 in
<br /> Agency required%removal 80%
<br /> Percent Runolf Caplure 90%
<br /> Mean Annual Runotl,V� g7,126 fl'
<br /> Event Mean ConceNralion ol Pollulanl,EMC 100 mg/I
<br /> Annual Mass Load,M,ow, 605.97 Ibs
<br /> Number ot caAridges-mass loading
<br /> Mass removed by pretrealmen�syslem, MM„ 302.99 Ibs
<br /> Mass laad to Gllers afler pretrealment, M�,,,, 302.99 Ibs
<br /> Es�imate ihe required Glter e((ciency,E�,Y�., 0.60
<br /> Mass lo be captured by Glters,M�,k, 161.79 Ibs
<br /> Allowable Canridge Flow rate,0�,,, 7.5 gpm
<br /> Check that Q�,❑can meel E�,nn OK
<br /> Number ol Cartridges required,N�,,,, 6
<br /> Trealmenl Capacity 0.10 c(s
<br /> Determine Critical Sizing Valuo
<br /> Number of Cartridges using Q�a�:�sovv.�i���no.v 3
<br /> Melhod to Use: MASS•LOADING
<br /> SUMMARY
<br /> Trealment Flow Ralc,c(s OJO
<br /> Carlridgc Flow Rale,ypm 7.5
<br /> Number ol Cariridges �
<br /> 020G5 Slormwaler360 12021-B NE Aiiport�Vay, Partland,OR 97220 (� �j�
<br /> 1/20/2006 Toll-Gce:800-5A8-4667 Page';1
<br /> � �77,
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