Geotech letter dated 8-11-06.pdfL I U & ASSOCIATES 4Y;61 r4ftr I- ..a i
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August 11, 2006
Mr. Michael Kerr
Chateau Construction & Development
2006 —196' Sheet SW, Suite 105
Lynnwood, WA 98036
Dear Mr. Kerr:
Subject; Soil Classification
Proposed Single-Fwdly Residence
82xx — 19& Street SW
Edmonds, WasWaston
1..&A Job No. 6A 112
RECEIVED
AUGI 12006
DEVELOPMENT SERVICES CTR.
CITY OF EDMONDS
Accor&g to the Ceoloalc �+iap of the Eastern W eod Part of ft Western Half
VVas ' j&jp, by James p_ Minwd, published by U. S. Geological Survey in 1983, the surficial
soil unit at and in the vicinity of the site of proposed residence is mapped as Vashon Till (Qv#).
The Vashon till sell unit a very dense mixture of unsorted clay, silt, sand, gravel, and scattered
cobbles and boulders, often referred to as "hard pan". The Vashon till soils over the top two to
four feet are wetadwred to a mediwn-dense state, and is moderately pemeable and compressible,
The underlying fresh till soils are ve<y dense and of extremely low permeability.
Based on the soil conditions described above, the till soils uuWexlying the site at strallow depth
"uld be classified as SM (silty samd with a trace to some gravel and occasional cobble). Pleasc
will if you haYe any questions.
_ niid S.., .
Yaws very truly,
ASSOCIATES, INC.
V AA
G
r I. S. {Dalian} Liu, Ph.D., P.E.
Consulting CeotechWcal Engineer
18213 Kerslake Placa NE • Kenmore, Washington 90028
Phone (425) 483-0434 - Fax (425) 4W2746