6907 RAINIER DR SITE DEVELOPMENT 2016-01-01 MF Import

"'acceptable pretreatment systems arc cithcr a wetvault or tank ctcsigned in �iccorciance wilh City stand;irds and cont,iining 30% of the 6-month, 24-hour slonn as Jead storage, or a pretreatment system th�t has obt��ined a GULD for pretreatment from the Washiugton State lleparhnent of l:cology Stonn water detention is required when 5,000 square fcct or more of hydraulically-connected impervious area is crealed by � project. • If suitablc soils cxist on ihe site, undergrour.d in;itU'atiou systetns (ag., inCiltr;iliuu ire��ches) or surfacc storm �vatcr infiltration systcros (c.g., splash blocks, pervious pavcrs, or surfacc ponding areas and/or s�valcs) may Ue used to avoid creating hydraulically-connected impervious ama from a storm watcr detention slandpoint. Section 3-2.2 of the City's Storm watr,r Management (vlanual lists site and desigu criteria ihat must be mct. • Prom a sturm watcr dr,tcntion standpoint, for an impervious arcr. to Uc considercd hydraulically-discouncetcd, storm �vater nmot'f from the L00-ycar, 24-hour storm nu�st bc tiilly retained and/oi infiltrated - williout resulting in significant putential (or advcisc effects from the infiltrntcd �valcr (such as slopc saturatioii or migration to crawlspaccs and/or basemcnts). llowever, �r u,� ��,-5�� sous �.��„�� s��n�o�i a�u infiltration of the 100-year, 24-hour srorm, partial infiluation may slill Uc fcasible to mect allo�vable storm water rcicase requirements. All sionn waler facilitics shall bc designed in accordance wilh applicable City stzndards and/or desien policies. A specially designatcd .irca �vill be required for washing of cars by residcnts nf the project. The tiilio�viug requiremenls must be nteC • "1'he area must Ue hydrulogically isolated from the storm drain�ge system, eilher by cunslrucling a tvash pad that mects City of Iiverelt slandards (4_2.2.3 13\4P 51.20 in the City's Storm water Alanagemcnt i�4anual), �c ,h discharcc of �vash water to the sanitary se�cer, or by other means acceplable lo tlte Ciq� (such .is slteet tlo�t�ing runoff from �he wash a[ea into a permcablc landscaping arca �vith in�iltration of thc wasl� wntcr into �hc ground). • Signs must bc postcd un Ihe silc-limiting r.ir washing to tl�e designated area only. � 'fl�e project covenants nuist conlain a clause that prohibiis car �vasl�ing on the site outside of tic spcci�illy designatcd arca. • If unils are Io hc rcnted, �he coveuant sh.ill state thal a ciausc reslricting vchicic waslting on thc si�c lo the design;uccl arca only will be �vritten inro U�e tenant Ieases and/or rental n;recmcnts. • A nnte stating tl�at car �vashing is ouly peimissible in the designated arc;i must be included on �he storm drainagc plans. 7'he project coven�mts nwst alsu contain a clnuse th�u prohibits ��el�icle maintenance on �hc sitc. If unil; are to be rentcd, IIIL` COVCIIiIIII S�1�II Slate tiiat ;i dausc ihat proliibits vehicle maintenmiec on ihe site will Ue �vritten into the tenant Icases ;ind/or rental agreements. e1 note stati�i� that vchide maintenance is prohibited on the sitc shall be included a� the stonn drninage pl�ns. �Ul catch basins iu ilic prujcet must be stenciled with a message similar to "Dump no �vaste, drains lo slre:un". '1'his message is typically spray-pninted onto the groun� adjacent tu the catch hasin �vith lhe use uf a stencil. 7'he stenciling needs to bc repcated, approximatcly ann�ally, wl�en the paint �vc.irs o(f. 'fhe developer/owner m�y cither perfonn thc stenciling, or give permi�siun ibr ��olunlccr groups to enter onm Ihe properq� and perform tlie slenciling. i