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-- <br /> 1 <br /> Deccio Engineering Inc. <br /> 7 17217 7Th Ave.W. <br /> Bothell,WA.98012 <br /> (206)390-8374 <br /> Fax:425-741-8214 <br /> c ri lC <br /> October 9,2017 does ifs s a- <br /> r q ,evta6Le app Ji <br /> Ms Dana Hendry ��QSe lit)a duP(12x2- <br /> Dynasty Homes <br /> P.O. Box 716 Aeja oif D 7qLLGc.✓,, <br /> Everett,WA 98206k <br /> Re: Proposed drainage design for 7030 Lower Ridge Road Everett <br /> Dear Dana <br /> Cid CoL <br /> cicy <br /> This site is 64,126 sf in si . ch is under 5-acres and inside the UGA area. The total <br /> impervious area is unde' 10,000 s rand total PGHS is under 5,000 sf. Therefore,the site is <br /> exempt for both detention an. water quality and requires the use of LID measures. The on-site <br /> soils are determined to be a Type C and not suitable for infiltration. Based on these conditions, <br /> per the DOE 2014 Stormwater Mana:ement Manual, Volu .e 1, Chapter 2, Table 2.5.1 the <br /> project has the option of usi d BMP T5.13 to address stormwater runoff. <br /> Please note that the on-site contours shovV e+eYs51eparated into two separate sub-basins <br /> which do not combine within % mile downstream and will be treated as two separate drainage <br /> areas with impervious areas under 5,000 sf each. <br /> Yes. <br /> These drainage basins and proposed BMP's are as follows: <br /> • The house foot print is located in the west sub-basin which drains west then north and <br /> proposes to use splash blocks along with 50-foot flow paths to address roof runoff along <br /> with BMP T5.13. _ <br /> • The driveways flow to the eastern sub-basin and out into the street which flows east V A <br /> then north. The project proposes to use driveway dispersal along with BMP T5.13 to <br /> address the runoff. <br /> Please review and contact me at 206-390-8374 if you have any questions. <br /> Sincerely, 7(7./Dj\Oci " L <br /> Richard Deccio P.E. <br /> Deccio Engineering <br />