Compaction_Report.pdf1ALAII ,IDALJ
ASSOCIATES rmtr ion Fidd Report
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ClierrrYOvrn` er: JB Asphalt Paving
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Project ifiarne'. 95"' flare West Utility Trench_. w ... .... .. .......... - .. _... ...m ...... _._
&...rtc�)tiort; 22301 951' Place West, Edmonds, Washington
Weather ther Cc nda tiara s: Overcast, light rain 40's
Prepared By: SEC:;
Report No
Date:
3/14/1.4
',/l.%/1'I
Reviewed By: Sze/
General
Brian Christianson of .Landau Associates visited the protect site today from about 1:45 ptrr to 115 prn. The purpose
of our site visit was to take in place field density (cornpactiort) tests on compacted fill sail placed in a storm drain
utility trench. Cour site visit was at the request of fret Niebruegge of .113 Asphalt Paving this morning, fMet with Eget
the site foreman for JB Asphalt to discuss utility trench backfill.
Observadons
When 1 arrived on site: at about 1:45 pm on friday :311411.4, a lurnping jack handcompactor was on site compacting
a 5/9 inch crushed rock that was beina used to backfill a shallow storax water pipe trench. Water was being added
to the backfill prior to compaction efforts. 'I'l`e overlying pavernent was saw cut approximately 113 to 24 inches in
width. The contractor- was completing the trench backfill on ourarrival at the site.
The utility trench was shallow with Lill depths typically ranging from about 12 to 18 inches.
Site photographs of work activities at the site this day were taken.
Site Compaction Testing 31114/1,C
Two in-place field density tests were performed on fill at approximately the subgrade elevationof the existing,
asphalt pavement on Friday 3!14/14. (Test #1 had a dry density of 120.6 lbs/cf and a Moisture content of 3.0%
water content; 'Test 92 had a dry density of 1.22.5 lbslcf and a moisture content of 3.7%.
Additionally, two 5 gallon buckets were collected of the backfill to determine the laboratory moisture density
relations (proctor test utilizing the ASTIM Method D-1557) to determine the relative compaction of the field test to
the laboratory nraximurn density for the material. The contractor- noted the field compaction tests had to meet a
specified 95 percent compaction requirement. Based on the visual observations of true contractor's compaction
efforts, the fill appears dense and non -yielding. Results are noted below following the determination of the
laboratory compaction method results.
Site Compaction Testing Remilts :3/18/14.
A laboratory maximum density of 122.5 lbs/cf with an optimum moisture content of 4.5 percent was determined
for the trench backfill material.
The in-place measured densities for Test 91 and 42 are 98%m and 11713%, respectfully based on the lab maxirnu n
density utilizing the ASTM D-1557 test procedure. Results indicate that the two tested areas passed the 95%
compaction requirement suggested by the contractor.
Conner arfions/Record m ridation
None,
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30 211rja.I Avenue Sr3ru hi - Echnorw. s, VVA 9801�20 ,� (425) 778 090/ ,, fax (425) /"r'hS 640119 z� www Janalrsri€nc.c�oin
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fY,
LANDAU i y
ASSOCIATES Construction FWd Repo
Visitors: None
Unsatisfactory Conditions & Recommended Correction: None
Attachments:
Distribution: Proiect File. JB ASDhalt
Landau Associates' representatives are onsite seleiy to observe operations of the contractor identified, to form opinions about the adequacy of those cperations. and report
those opinions to our client. The presence and activities of our field representative do not relieve the contractor from its obligation to meet contractual requirements. The
contractor relains soie responsibility for site safety and the methods. cperations, and sequences of construction.
A preliminary copy of the Field Report may be provided solely as evidence that field observation was performed_ Observations and/or conclusions and/or recommendalions
conveyed in the Field Report are subject to review and revision by Landau Associates' project manager or designee. A reviewed Field Report shat{ take precedence over a
preliminary report.
Signed:
614114 P1144850011FiIcRmSRI#1,_LAI Field Report 031414 bec.doc LANDAu AssocIATES
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