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*acceptable prcireatment systems �u�e cither a wen�ault or tank desigued in accordance �t�ith Ciq, <br /> stand;irds :md contuining 3056 uf thc 6-month, 24-hour storm a� dead storage, or a preveatment <br /> system Ih�u has obtained a GULD for prcu•eatment from the \�Jashington State llepariment of <br /> Ecology <br /> Srorm water detcution is mquired �vhen 5,000 squarc fcct or more of hydraulically-connected <br /> impervious ama is created by a project. <br /> • If suitable soils exist on �he site, undergroun� inGltralion systems �,.:.g., infillratiun trenches) <br /> ur surfacc storm water inliliration systems (c.g., splash blocks, peivious pavers, or surfacc <br /> ponding arens and/or swales) n�ay Ue used to avoid creating hydr�i;lically-co�u�ected impervious <br /> area tYom a smrm �eater detention standpoint. Sectiou 3-2.2 of the City's Storm water <br /> n1anagement lvtanual ]ists site and design criteria ihat must be mct. <br /> • Prom a storm walcr dctcntion standpoint, for an impervious arca to be considcred <br /> hydraulically-disconnected, storm water runoff froui the 100-ye�u•, 24-hour storm must be full�� <br /> reciineJ andlor in(iltr.�ted - without resuUing in significanl putential foc ad��crse ef(ects f'rom ihc <br /> infiltra�tcd �aater (euch as slope satur.rtion or migration to criwlsp�ices ;ind/or b:�sements). <br /> lio�vevcr, if the on-sitc soils cannnt support full infiltratiou of the 100-year, 24-hour storm, <br /> p;u�tial inliltration uriy slilt be feasiblc �o meet allowable sturm wnter rcicase requircments. <br /> All storm �vltcr lacililies shxll be designed in accordance with applic�ible Ciry standards and/or <br /> design policics. <br /> A specially designated :ircu wiil be required for �vashing of cars by ��sidcnts af ihe project. '1'hc <br /> follo�ving requirem��nts must bc met: <br /> • 'Che �irca mu�t be liydrolc�gically isolatcd from the stonn drainage system, eiUier by <br /> cunstructing a wxsh ��ad that meets City of Gverett standards (�4-2.2.3 13\9P S1.20 in the City's <br /> Storm ���ater ,�lanagetnent ndanual), ���iUi discharec of wash watzr to the sanitary se�vcr: ur by <br /> oiher means accep�ahle ro tlie City (such as shcet ilowing runoff Gom Uie wash area into a <br /> pcnncable landsc;iping area wiih infiltr,uiun uf thc wash �vater into the ground). <br /> • Signs must be posted ca the site-limiting car w.ishing to the designaled area only. <br /> • "fhe project coven�mts must contain a clause that prohiUits car washing on the site outside of <br /> the specially designated .irca. <br /> • If uoits are to bc rent,;cl, Ihe co��enant sliall st,ue that a dause restricting vehide washing on <br /> lhe site to the designated nrea ouly will bc written into the tenant Ieascs �nd/or renlal <br /> ngreemenls. <br /> • A note s�ating that car �eashing is only permissiUle in the designated area nmst be incleded <br /> on thc storm drain�gc plans. <br /> 7'lie project covenants must alsu contain a clause that prohibits vehicle mainten,mce on the site. <br /> If units are to be rentea, the covenant sl�all state ihat a clause that prohiUits vehicle maintennnce <br /> on thc site ���ill be writlen into thc tenant lc�scs and/or rental agreements. A note stating that <br /> ��ehicle maintcnanc� is prohibitcd on the site sh,ill be induded un thc stonn drainagc plans. <br /> :111 catch basins in the project inust be stencilecl �vith a message similar to "Dump no waste, <br /> ch•ains to suram". '1'I�is mcssage is lypirilly spray-painted onto tlie ground adjacent to the catch <br /> hasin ���ith tlic use of a stencil. 'fhe stenciling needs to be rcpcaled, approzimatcty annually, <br /> ���hen Uu p�inl ���cara off. 'I'he devcioper/o�vner may cither perfa•m the stenciiing, or give <br /> permission for vuluntccr ��roups to enicr onto the property and perform the stenciling. <br /> i <br /> ; � � <br /> � _I <br />