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<br /> I II cou� n i�.wt�vnes fI�570RMWATERY� II
<br /> � ___�. .� •�r��� uo�
<br /> ' Determining Number of Cartridges for Sys[erc�s Downstream of Deten[lon
<br /> 9faJecC Silver L'ake Medical Date: luly 30,2004
<br /> Loeatbn: Eve�ett,Washingtnn SMI Eny.: Tara Michie
<br /> ' Step 1 Detnrmine maxlmum releasa rata from Aelentlon
<br /> Q�.�.,..�,w.(clsl ��
<br /> Step 2 Delermine Ireetment release rete Iram tlalentlon
<br /> ' Q�.i�.,e vn.i(cls) 0.09
<br /> Slep 3 Inpul ihe percentege ot pollutnnt removel raqulred
<br /> ' AgencY'M 80% .
<br /> Stnp 4 falcuiate pret:eatment removel efflclenry using Ff1WA method
<br /> Volume ot seltling basin,VU Ql') 5,376
<br /> Runoft Volume,Vr Qt°) q,q77
<br /> ' RaUo ol VU/4r 1.20
<br /> DepOi ot waler in 6asin,H(III 1.56
<br /> ' Pieirea�menl Ef6ciency,Ewe 59(, assumes 50%irr delenlion antl 50%
<br /> �nol lo eviceed 50%.see atlacheU graplq br wa�er c�uah�y ponJ
<br /> Step 5 Calculete Ne ennuel mass loed
<br /> ' M11ean Annual Rainlall,P(in) 38
<br /> Site Aica,A(ac�es) 1.81 � � 1 ��
<br /> (�r�
<br /> Impervious Area(acres) 1,q9 ] ����U� ��'L`
<br /> � Percenl Impervious(%) 82 ]
<br /> Composite Runolt Caellicienl,C 0.79 ] �\�l � �
<br /> Percenl Runoll Capuue C 90% ] / � V I 2'
<br /> � �� `j' f h V
<br /> Mean Nmual Runu11,V�(It'1 ]77,OFi7 U
<br /> �n
<br /> Evenl Mean Conct��!ratiun ot PoliWunl.EMC(�»PJI) ]00 /�/� 1 ���
<br /> A����i�al M11ass l.ouu.M,,,,,�llhs) 1.104.72 ] C � .�� �
<br /> � SU.p 6 Celculete the number of carvldga on e mass�loetling basb � ' L �
<br /> Mass mmovetl by prcueatmenl sYstem.Mw.11Us) 828.54 , ^ ��� '
<br /> I Mass baJ lo lilters atler prelreatmenl,Mw„�(Ws) 27618 'CJ (�
<br /> � � .
<br /> Eslimale Ihe required�Ilter elh�lencY.Eiui.� 20% , ! �I
<br /> (�.
<br /> tdass tu�e caplured Uy lilleis.M�u,,,(lbs) 55.24 � � V
<br /> IAlluwu6le Cartritlge Flow rule.Q,,,,(gpm) �,g �
<br /> Check Ihal Q,,,,cun meel E,u,,, OK , f
<br /> I Mass load per canriJgc,M11w,�(lbs) 36 �l
<br /> 1{wnberolCa�vidgesrequiretl.N,,,,,: I�l
<br /> L—=J
<br /> 1�eulinentCapaciry(cls) 0.03
<br /> ( Step7 �eterminaCrlllcalSlzingVelue
<br /> NunlLerofCuituJgesuSingQ,,.i,.,,�,r,�.N��,,, I�
<br /> 1___J
<br /> Step 8 ChaSe Method Wlth Mwt Number of Cartddges
<br /> Memod io use: MASSLOADING
<br /> SUMMARY
<br /> I Treatment Flow Rate 0.03
<br /> Canutlgu Flow Raie 7.5
<br /> Number ot CailriJges y
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