1502 100TH ST SW 2016-01-01 MF Import

5. SOURCE CONTROL Th�s pro�ect proposes to ccnstruct a new SFR on this parcel w�th a dnveway Per Voiume 1 0( the City of Evereri 2010 Stnrmwater Management Manual residential de��elopme�} does not requc:e source control 6. PRESERVATiON OF NATURAL DRAINAGE SYSTEM The runoff irom the site improvements wtll be d�sperseo intoluver amended s�tls on�s�ta and flow in the southerly natural downstream duection However by breaking �� the existmg compacted sods and prowdmg the necessary sod amendments to the sods around the site a max�mum amount ot site runoff from the developed pro�ect w�ll be absorbed and in(illrated into the existing on-site soils This will mimic ihe existing cond�tions by mamta�n�ng the exisimg direct�on and conditi�n o� fiuw from th�� s�te 7. ON-S17E STORMWATER MANAGEMENT The soils for ihis proiect were found to be Alderwood sandy loam which have been graded or had fill placed over them ;ince on-site dispers�on and sod management will be used the existing disturbed soils on ihe srte wdl Le treated to meet the City requ�remenis for amended soils The roof runoff will be directed to one of four sptash blocks that will dra�n away irom the SFR and to a shall�w swale along the west or east property lines The swale wdl dram south and eventually leave the site over the southern property Ime For the ne�+v PGIS a transition zone has been designed to collect and d�sperse the flows along lhe downsiope side of the new driveway area The dispersed Flows from the transition zone will pass over a minimum of 10-(eet o( landscapmg w�th amended soils pnor to leaving ttie site This pro�ect does not propose to construct more than 5 000 sf of PGIS so it is ezempt irom any water qualdy treatn�ent systems per Mm�mum R�uirement 6 Finally, any area of the site nol proposed to be �overed with impervious surfaces will be treated to meet tlie cntena for GOE Bht' T 5 13 Please reter to the enqmeenng plans for the locations of the soii amendments ard add�!ional details nd�� ,00"�e� ; sFR �z.izus-, � � o�� zuiz N,,ney , /(� '`�� � .i