10100063 Earth Investigations. Consultants
February 28, 2012
Job 2410.01.00
Mr. Barre Barnes. President
Vette Investments & Property Management, Inc.
2175 de la Cruz Boulevard, Unit C Z Z,� 13n/
?7 5- ti
Santa Clara, California 95050
RE: GEOTECHNICAL REVIEW
Retaining Wall Backdrain
Proposed Residence (under.construction)
430.Cordova Road
Cupertino. California Z • •�L
�l�l"moo e3
Dear Mr. Barnes:
This letter is to confirm that we observed the installed backdrainage system for
the foundation retaining walls: It consisted of'a perforated, 4-inch diameter PVC
pipe at the base of the wall with crushed rock separated from the adjacent soil by
filter fabric. The rock was brought to within a foot of the ground surface and
covered with filter fabric before, placing backfill soil. It is our opinion that the
backdrainage system was installed in general:conformance with the geotechnical
recommendations. Please.allow the same_inspectibaopportunity for all site walls
prior to rock placement:
We trust this report provides you.with the information you require at this time.
Please.contact the undersigned if you�have any questions.
Very trul ours, �0 c ro
E Inve igations-Consultants. 0 t
`���. RALD}��'YQCi
? No.6G 113
CERiiF1ED
FNGINEERING
1
Joel E. Baldwin; II GEOLQG15
_ si
Engineering Geologist 1132(renewal date 212811OF CA',_
JEB:jb-pr/co
Distribution: electronic copy and paper copy to addressee; electronic copy to City
of Cupertino (chadm@cupertino:org)
Geologists & Engineers
P.U. Box 795 0 Pacifica,CA 94044 0(650)557-0262 40 Fax(650)557-0264