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SOIL & ENVIRONMENTAL ENGINEERS, INC.
16625 Redmond Way, Suite M 124, Redmond, Washington 98052, www.SoilEnvironrnental.com (425) 868-5868
May 31, 2017
Mr. Chris Carlson, AIA
Buffalo Design
1520 fourth Ave suite 400
Seattle WA 98101
CC: Ms. Gabie Lefebvre
Geotechnical Report Addendum
Onsite Infiltration
Proposed King County Regional AFIS Lab
900 Oakesdale Ave. SW, Renton, WA
Dear Chris:
Soil & Environmental Engineers, Inc. (S&EE) has performed a geotechnical investigation for the above -
referenced project. The report of this investigation is dated March 7, 2017 and has been submitted to you
previously. Per your recent request, I have reviewed our file and the requirements for onsite infiltration
(0.2.2.1 item la, 2017 City of Renton Surface Water Design Manual). It is my opinion that onsite
infiltration is infeasible as the site soils consist of fill materials in the upper 5 to 6 feet.
I trust that this communication will serve the current need. If there is any question, please call.
of0�28166
Very truly,
SOIL & ENVIRONMENTAL ENGINEERS, INC.
r ' S �1- ;
C.J. Shin, Ph.D., P.E.
President