20140728164333946.pdfLIU & ASSOCIA'rES, INC.
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Geotechnical Engineering Engineering Geology Earth Science
July 21, 2014 -
Mr. Jim Henricks
336 Sunset Avenue
1'�',drnonds, WA 98020
Dearmr. nem-icks:
Subject: Response to Comments in 7/1/2014 City's Review Letter
Single -Family Residences
336 and 340 Sunset Avenue
h,Thrionds, Washington
L&A Job o.14-041.
Regarding the comments it) Cit -,y of Eduronds 7/1/2014 review letter by Mr. Clugston, we
have the following responses:
1. Soil Classification
Unified Soil Classification System (rnost cornmonly used by geotechnical engineers)
in combination with soil unit identifications in geologic rnaps published by C.J. S.
Geological Snrvey (njost oornmonly used by geologists and geotechnical engineers)
are used in classifying soil units all the subject prqject sites in our geotechnical
investigation report, tJSCS and LJS(3S classify soil units based or) 'their geologic
f'oniv,ition, composition, and physical and rnechanical characteristics, and deal with
soil units with thickness from afew fact to over 100 feet thick. They are very useful
in geotecImical engiiiecring analysis, such as stability, bearing capacity,
compressibility, erosion, potential, permeability, etc., and are preferred systems by
19213 Kenlake Place NE - Kenimore, Washington 98028
Phone (425) 483-9134 - Fax (426) 486-2746
July 21, 2014
Critical Areas Report —Two Single -Family Residences
L&AJob No. 14-041
Page 2
gooteclinical engineers and geologists. NR(, -"S Classification System, on the other
hand, is mainly t6r agriculture use and only deals with the top 5 feet, of sails.
2. Critical Areas Report
The Critical Areas Report was revised and attached hereto. It is for development of
new residences at 340 (under constrUction) and 336 (to be constructed) Sunset Avenue.
A geotechnical investigation report is embedded in the Critical Areas Report,
Please coritact its if you have questions.
Attached: Critical Areas Report
Yours very truly,
J. S. (Julian) Liu, Ph.D., P.E.
Consulting Gcotechrricall'�',ngineer
IAILJ & AJSS(.KJATES, INC.