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./ <br /> o a <br /> 0 In0� l��L�`��� �� <br /> .lunc 15, 2005 DAVID EVANS LJ l_', I U ;I <br /> �N�� ASSOCIATES"�� JUN172005 � <br /> , 1 `' _ . _ ._ _.. _ <br /> Kirk I3rooks, Pcnnit Sen�ices Managcr I./ I�I �� I --, �!TY OF EVERETT <br /> City of I;vcrett Yubtic 1'Vorks � �� � V ' 'n�,�n���nnpiPuM�r. Se�v��e� <br /> 3200 Ccdar Strcct � � �11 , <br /> ' <br /> Lvcrctt, WA 98"t01 <br /> SLfI3JECT: SATELLITF. It�UL/13ARGE TRANSFER FACILITY- HYURAULIC ANAI.YSIS <br /> Dcar Mr. Brooks: <br /> Attachcd are supplcmcntal hydraulic analysis calculations dcvclopcd for thc Sa�ellitc Rail/13argc Transfcr <br /> Pacility as rcqucstcd by Janc 7_inuncnnan upon rcvicw of DL.4's I lydnulic Rcport submiltcd April 13,2005. <br /> • Sizing of thc SMI (Storni�t�atcr Managcmcnt IncJ Stomifiltcrs throughout thc sitc wcre sizcd Uy DEA <br /> � using supplemental analysis providcd by Joe Rcidy of SMI t-S00-548-�1C>G7. Internal testing and analysis <br /> �, by SMI of thcir product linc indicatcs �hat optimal trcatmcnt occurs at a ilo�e n�c of 5 — IS gpm/per <br /> ,'�1i�' �:� cartridgc. Thc COG S�aff Report to the licaring I:xaminer datcd Novembcr 30, 2004, stated S�aff would <br /> ¢ 1 `,�` acccpt a tlow ratc of no grcatcr than 7.5 gpn�/per cmtridgc. ConvcrtcJ, this Ilo�v ratc is cquivalcnt !o <br /> /�i � ��'? `e( 0.01 G7 cfs. I�rom the analysis provided April 13, 2005, Ilow rates associatcd with the 2-year slorni e��ent <br /> J:,� arc equi��alcnt to ihc G•month Uy using thc 753'%� multiplicr pruviJcd within thc WNHM sotiwarc. So, a <br /> . <br /> ��� �(� 2-ycar stomi cvcnt tlo�v for any Uasin may bc dividcd by 0.01G7 cis to yicld thc cartridgcs rcquircd. <br /> � �\L(.�`� <br /> • Sizing of Contcch's Vonech 1000 vault situatccl within thc proposcd parking bt ���as siud by Scon <br /> ''����.� ,;� Gorncu of Contcch I-A77-907-8G76 using sub-basin 808I)'S15 provided by DGA. l'he Specifier's <br /> �� ' \'Vorkshcct complctcd by DGA and submittcd to Contcch is attachcd. <br /> h��� `�' <br /> C eQ�' . Sizing of the "l_urn Trench Drains siluatcd throughout thc pier were sized Uy Scott Chandler 1-253-581- <br /> �, 2198 using sub-basin analysis providcd by DGA. Ifydraulic capacity calculations dcvcloped by A.G. <br /> , e ��� Goodrick Co. arc attachcd. At thc timc thcsc calculations wcrc providcd, thc dcsign was to providc 8- <br /> G" h r cartridgcs warth of runoff trcatmcnt on thc picr and convcy thc remaindcr to upland facilitics. During thc <br /> `^'� � ��` coursc of dcsign, upland runotT trcalmcnl often bccamc impractical. An addilional G-cartridgcs worth of <br /> � � � V trcatment on the picr�vas provided instcad�vhich rcduced hydraulic capacity needs. <br /> ��CHqF <br /> Sinccrcly, C F WAS �4 <br /> C�,�E�j 'YC � <br /> DAVIll EVANS AND ASSOCIATES,INC. F� � <br /> I'homas �Vcllcr, Y.L•. / . '�i;i,i���°•,� <br /> ScniorL•nginccr 't'S'��!'J4i. ���'� <br /> Auachmcnts/Gnclosures: Supplcmcntal liydraulic llocmncnts from DG �?�'�.� � � `�� ick Co. <br /> - - - - - - - �L <br /> 1020 1Vee� Mannr A'icw Uri�'e Sunc 200 [��crrii lVa�lungim, 41t101 lidi�phunr. 4?5259_d09'� ISaintdr 425.259.3230 <br />