Special Inspection Report - Infiltration Rec'd 3.18.19.pdfLIU & ASSOCIATES, INC.
Geotechnical Engineering Engineering Geology Earth Science
March 15, 2019
Mr. Jacob Lyon
320 Dayton Street, Suite 108
Edmonds, WA 98020
Dear Mr. Lyon:
Subject: Infiltration Trenches Final Inspection Report
Brackett's Corner
801 Avenue W and 2121h Street SW
Edmonds, Washington
L&A Job No. 15-058
At your request we provided construction inspection services for infiltration trench
systems of the subject project. We observed cut bank stability of infiltration trenches,
verified types of soils at bottom of trenches, watched lining of trenches with non -woven
filter fabric, examined washed gravel used to backfill trenches, and observed installation
of outflow perforated PVC pipes embedded in gravel backfill.
It is our opinion that the stormwater infiltration trench construction work we were
requested to inspect were acceptable. Please feel free to contact us if you have questions.
Yours very truly,
LIU & ASSOCIATES, INC.
J. S. (Julian) Liu, Ph.D., P.E.
Principal
19213 Kenlake Place NE - Kenmore, Washington 98028
Phone (425) 483-9134 - Fax (425) 48.6-2746