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Proposcd Impro��cmcnts Summar�• <br /> :� -'�7,400-syuare foot building is proposed fi�r Ihc sitc. Stomneatcr for thc siic��ill bc collectcd <br /> in a conacntional pipc sysicm (scc Shcct C4.0 in Appendix A). Storm��atcr yuality trcatment <br /> �cill bc pro�idcd by a canridgc filtcr systcm IStomiPiltcr"). Voncchs� system vault will hc uscd <br /> to provide prc-trcatmcnt prior Io thc StomiFiltcr` per City of E�•crctt requirements. Uctcmion <br /> for thc site will hc pro��ided in thc ezisting Gicm�ood Regional Detenlion PonJ. Lot 2 �aas <br /> indudcd in ihc iributary arca for Ihc dcsign of ihc dcicntion pond. Stomi���atcr passing through <br /> the Stornil�ilter° ��ill discharge to lhc storni main in Associated Bouleeard, a�hich thcn <br /> discharges to thc Glcmvood Rcgional Dcicntion Pond constnutcd during the Valley Electric <br /> projcct. Scc Figurc 1 Doa nslrcam Drainagc Basin Map in Appcndix A for thc Jctails of thc <br /> do�enstrcam com�cyance. Storni�rater Gom thc roof u�ill nlso discharge to the Associated <br /> f3oulc�ard dc;m stomnvatcr drainagc systcm ihat comcys trc.11C(I SlOf11711'81CI'80d fOO�NfIO��fO <br /> Ihc Glcnwood Dcicntion Pond. <br /> Cont�cl'ancc Ucsign <br /> Ihc proposcd ston» drain s�-s�cm ��ill comc�� surfacc runol'f linm lhc E3uilding [3 roo�; parking <br /> Iu�s, sidc���alks, and landsa�pe arcas. This stonn drain system is dcsigned to com•cy thc 24-hour, <br /> _'�-�rar slami c�cnt, �+hich has a rainfall dcpth of 2.G inchcs as dcfincd in ihc CO/:'S7ornnrarrr <br /> 1/,fnu,��cmcul Almuirrl. 7 hc rational mcthod �eas uscd for pipc sizing calculations. A sprcadshcct <br /> shu��ing pipc sizc calculations is includcd in Appcndix [3. <br /> I'hr pipcs ��cre sircd to conccy thc 25-ycar runoff���ithout escccding 90 perccnt capacity. Pipc <br /> Ihat is ti inchcs �hrough I R inchcs is ;idcyuatc �o comcY thc nmoff frotn �hc roofand parking <br /> luts. <br /> Detentiun Desi�;n <br /> Slumi�catcr dctcnlinn Ibr thc sitr �cill hc prucidcJ in thc Glcmcoc�d Rcgional Dcicn�ion Pond. <br /> 1:unufT�l�um Lnt _'. assuming dc�cluprd condi�ions, ��;is includrd in thc original calculatirnis for <br /> ihr dcsign ofthc rxisting .lctcn�ion ponJ. ticc Ihc hydr:mlics rr�ion. �iticJ .Stunmru�rr,Sirr Plan, <br /> �I."unurrd lf�ndrr��r�l. .lunr ?nUl. li�r marc inli�mi;i�ion. <br /> 11 :itcr Qu:ilit}� Ucsi�;n <br /> 1 tiionnl ilirr` c:inrid�c fillcr �:iult ��ill �,m� iilr �catcr yualit� irr:rtmcnt Ibr �hc pa�cd arcas <br /> ;u��und Ruildin� B Sturm��.ucr ��ill �riss throuch ;i prctrcatmcm �'u�lcchs" Sys�em to scparatc <br /> I;uecr srdimrnt� and trash hcfi�rr cmcring ihc titurml'ilicr`. 'fhc filtcrs usc a CSF' I.cafmcdia <br /> ti�r sc�limcnl, nil. solublc mctals. anJ �utal nulricn� remo�;il. 7�hc fihcr is sizcd �o Irca� thc six- <br /> ni mth storm uting thr SlonnPihrr` I)rsi�n �lanu,il and Cit� of f:�crctt rcyuircmcnts. Sec <br /> 1 iprndix li lin tilurmfiltcr` siiinc r:ilculations. Thc si�c arca has hccn Ji�ided imo h�o <br /> �� ,�arur h;isins iha� arc hcine trca�rd h� sc�uiritc �catcr yuali�� strucwres. An S x ib-fool �ault <br /> �� �ih '1 liltcr cartridcrs ireats runotl frnm thc maj„rity ot thc sitc arca. A scparatc 72-inch <br /> �I .nnrirr m:mh��lr ��ith six c;inriJprs is rryuirrd to �rcat runoff irori thc rcmaindcr of thc si�c <br /> Panstioni�evelopment LLC Building B � ��� ��-�� -- -- ----�-----� <br /> HyAraW�cs Report �� <br /> �1 � � � � <br />