1508 100TH ST SW 2018-01-02 MF Import

, 5. SOURCE CONTROL This project proposes to construct a new SFR on this parcel with a driveway. Per Volurc e 1 of the City of Everett 2010 Stormwater �lanagement M�nual residential development does not require source control. 6. PRESERVATION OF NATURAL DRAINAGE SYSTEM The runoff irom the site improvements will be dispersed intolover amended soils on-site and flow in the southerly natural downstream direction. However by breaking up the existing compacted soils and providing the necessary soil amendments to the soils aruund thc site a maxinium amount of site runoH from the deveioped project will be absorbzd and intilirated into the existing on-site soils. This will mimic the existing conditions by maintaining the existing direction and condition of t�ow from tf��s site. 7. ON-SITE STORMWATER MANAGEMENT The soils for this project were found to be Aldervvood sandy loam which have been graded or had fill placed over it. Since on-site dispersion and soil management will be used the existing disturbed soils on ihe site will be treated to meet the City requirements for amended soils. The roof runoH will be directed to one of four splash blocks that will drain awa/ from the SFR and to a shallow swale along the west or east property lines. The swale will drain south and eventually leave the site over the southern property line. For the new PGIS a transition zone has been designed to collect and disperse the flows along the downslope side oi the new driveway area. The disnersed flows irom the transition zone will pass over a rninimum of 10-feet of landscaping with amended soils prior to leavir,g the site. This project does not propose to i�nstruct more than 5,000 sf of PGIS so it is exempt irom any water quality treatment systems per Minimum Requirement 6. Finally, any area of the site not proposed to be covered with impervious suria�es will be trea!ed to meel the criteria tor DOE BMP T.5.13. Please refer to the engineering plans for the locations of the soil amendments and additional details l�dau 100� Ln� 10 SFR 12-1205-10 fiec 2012 Page 9 � , �