15020133-Spec InspSILICON VALLEY SOIL ENGINEERING
GEOTECHNICAL CONSULTANTS
File No. SV1087N
March 4, 2015
Richie Bobcat & Hauling
PO Box 28703
San ,Jose, CA 95159
Attention: Mr. Richie Maes
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O'FILE
Subject: Existing Residence
_tet 201 1 5 Suisun Drive
Cupertino, California
TESTING AND INSPECTION SERVICES DURING
THE BACKFILLING OPERATION OF THE
SWIMMING POOL REMOVAL
Dear Mr. Maes:
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 20115 Suisun Drive in Cupertino,
California.
The existing swimming pool area was approximately 600 square feet with
depths ranging from 4 to, 8 feet below existing ground elevation. First, the
entire pool was removed and inspected. 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 Richie Bobcat &
Hauling on March 2 and 3, 2015.
A total of 8 in-place field moisture/density tests were performed by our field
engineer using a nuclear gauge (CPN MC -IDR -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 • (408) 324-1400 9 F (408) 324-1404
I
File No. SV1087N
March 4, 2015
As a result of our testing and inspection services, the contractor has performed
the backfilling operation of the swimming pool removal accordingly for the
"buildable" area.
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
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Sean Deivert
Project Manager
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SV1087N.BF/Copies: 3 to Richie Bobcat & Hauling
2 SILICON VALLEY SOIL ENGINEERING
File No. SV1087N March 4, 2015
TABLE I
SUMMARY OF FIELD MOISTURE/ DENSITY TEST RESULTS
Test
Date
Test
Moisture
Dry
Rel. Comp.
Soil Type
No.
2015
Location/
% Dry
Density
% of Max.
& Remark
92.9 B
4
Elevation
Weight
p.c.f.
90.0 B
5
SWIMMING POOL BACKFILL
1 3/2
X1 /21.
17.1
107.6
91.2 B
2 IsX2/2.L.
F.L. =
17.7
108.6
92.1 B
3
X3/5.L.
16.4
.109.6
92.9 B
4
X4/5.L.
17.9
106.2
90.0 B
5
X5/3.L.
18.0
107.2
90.8 B
6 3/3
X6/F.L.
16.3
108.7
92.1 B
7 itX7/F.L.
17.1
107.6
91.2 B
8 isXs/F.L.
17.8
107.3
91.0 B
NOTES:
2.L.
= SECOND LIFT
31.
= THIRD LIFT
51. L.
= FIFTH LIFT
F.L. =
FINAL LIFT
B: Dark Brown Sandy Clayey SILT
3 SILICON -VALLEY SOIL ENGINEERING
ABANDONED SWIMMING POOL
x I
3X8 xI
X5k4
V2
SUISUN DRIVE
NOTE: X DENOTES APPROXIMATE TEST LOCATION
Silicon Valley Soil SITE PLAN File No.: SV1087N FIGURE
Engineering
Existing Residence
239.1 Zanker Road, #350 Drawn by: M.H. 1
San .Jose, CA 95131
(408) 324-1400 20115 Suisun Drive
Cupertino, California Scale: NOT TO SCALE
4
March
2015
125
110
105 --
10
12 14 16 18 20 22
Moisture Content (% of Dry Weight)
SAM PLE: B
DESCRIPTION: Dark Brown Sandy Clayey SILT
LABORATORY TEST PROCEDURE: ASTM D1557-12
MAXIMUM DRY DENSITY: 1 1 8.0 p.c.f.
OPTIMUM MOISTURE CONTENT: 16.0%
Silicon Valley Soil
Engineering
2391 Zanker Road, # 350
San Jose, CA 95131
(408) 324-14.00
COMPACTION TEST B File No.: SV1087N
Existing Residence
Drawn by: M.N.
20115 Suisun Drive
Cupertino, California I Scale: NOT TO SCALE
5
FIGURE
2
March
2015