15060102-Special inspectionSILICON VALLEY SOIL ENG[NEERING IF 'ILE
GEOTECHNICAL CONSULTANTS
11®10 -
File No. SV1363F
,June 24, 2015
Bjurman General Engineering Corporation
3553 Haven Avenue, #7
Menlo Park, CA 94025
Attention: Mr. Phil Bjurman
Subject: Swimming Pool Removal
Existing Residence
1064 Westlynn Way
Cupertino, California
TESTING AND INSPECTION SERVICES DURING
THE BACKFILLING OPERATION OF THE
SWIMMING POOL REMOVAL
Dear Mr. Bjurman:
Pursuant to your request, we have performed testing and inspection services
during the backfilling operation for the swimming pool removal. The subject
site is the existing residence located at 1064 Westlynn Way in Cupertino,
California.
The existing swimming pool area was approximately 650 square feet with
depths ranging from 4 to 7 feet below existing ground elevation. First, the
entire pool was removed. Then, the excavated bottom was compacted. Next,
the excavated area was backfilled with import soil material to the existing
ground surface. The import soil material was moisture conditioned as necessary
and compacted in uniform 12 inch lifts to at least 90% relative maximum
density. The backfilling operation was performed by Bjurman General
Engineering Corporation on June 22 and 23, 2015.
A total of 8 in-place field moisture/density tests were performed by our field
engineer using a nuclear gauge (CPN MC -1 DR -P). These tests showed values in
excess of 90% relative maximum density of the backfill material as determined
using the laboratory compaction test procedure ASTM D1 557-12. The results
of the field moisture/density tests are summarized in Table_ 1. Approximate
locations of these tests are shown on the Site Plan - Figure 1. -
2391 zANKER ROAD, SUITE 350 ® SAN JOSE, CALIFORNIA 95131 a (408) 324-1400 • F (408) 324-1404
File No. SV1363F
.June 24, 2015
As a result of our testing and inspection services, the contractor has performed
the backfilling operation accordingly.
If you have any questions or require additional information, please feel free to
contact our office at your convenience.
Very truly yours,
SILICON VALLEY SOIL ENGINEERING
Sean Deivert
Project Manager
Vien Vo, P.E.
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2 SILICON VALLEY SOIL ENGINEERING
File No. SV1363F
.June 24, 2015
TABLE
SUMMARY OF FIELD MOISTURE/ DENSITY TEST RESULTS
Test
Date
Test
Moisture
Dry
Rel. Comp.
Soil Type
No.
2015
Location/
% Dry
Density
% of Max.
& Remark.
90.7 B
4 IfX4/5.L.
Elevation
Weight
p.c.f.
93.8 B
5 IfX5/51.
SWIMMING POOL BACKFILL
1 6/22
X1 /3.L.
11.4
109.4
92.8 B
2 isX2/3.L.
12.7
109.8
93.1 B
3 isX3/31.
14.8
107.1
90.7 B
4 IfX4/5.L.
12.8
110.7
93.8 B
5 IfX5/51.
13.8
107.1
90.7 B
6 6/23
X6/F.L.
11.9
109.5
92.8 B
7
X7/F.L.
13.5
106.8
90.5 B
8
Xs/F.L.
13.8
107.8
91.3 B
NOTES:
3.1- =THIRD LIFT
S.L. = FIFTH LIFT
F.L. = FINAL LIFT
B: Light Brown Gravelly Sandy Clayey SILT
3 SILICON VALLEY SOIL ENGINEERING
\ 'r6
ABANDONED SWIMMING. PO(
II
I
I
l
NOTE: X - DENOTES APPROXIMATE FIELD TEST LOCATION
Silicon Valley Soil SITE PLAN File No.: SV1363F FIGURE
Engineering
2391 Zanker Road, #350 Existing Residence Drawn by: M.N. 1
San Jose, CA 95131
(408) 324-1400 1064 Westlynn Way
Cupertino, California Scale: NOT TO SCALE June
1. 2015
Y
120
100 +
7
9 11 13 15 17
Moisture Content (% of Dry Weight)
19
SAMPLE: B
DESCRIPTION: Light Brown.Gravelly Sandy Clayey SILT
LABORATORY TEST PROCEDURE: ASTM D1557-12
MAXIMUM DRY DENSITY: 1 18.0 p:c.f.
OPTIMUM MOISTURE CONTENT: 13.0%
Silicon Valley Soil
Engineering
2391 Zanker Road, #350
San Jose, CA 95131
(408) 324-1400
COMPACTION TEST B I File No.: SV1363F
Existing Residence
1064 Westlynn Way
Cupertino, California
5
Drawn by: M.N.
Scale: NOT TO SCALE
FIGURE I
2
June
2015