711, Play area, requires grading, Studies & ReportsCOAST GEOTECHNICAL, INC.
Final Geologic As Built Report
for
#2 Outrider Road
� Rolling Hills, California
BY:
COAST GEOTECHNICAL, INC.
W. O. 303806-04, dated November 5, 2008
FOR:
Mr. & Mrs. Kim
#2 Outrider Road
Rolling Hills, CA 90274
COAST GEOTECHNICAL, 1NC.
14747 Artesia Blvd., Suite 1-D, La Mirada, CA 90638 Ph: (714) 521-0169 or (714) 521-2827 Fax: (714) 521-0179
November 5, 2008 W.O.303806-04
Mr. & Mrs. Kim
2 Outrider Road
Rolling Hills, CA 90274
Subject: Final Geologic As Built Report for #2
Outrider Road, Rolling Hills, California
Reference:
1. Geologic Investigation of Proposed Recreation Room and Stable, #2 Outrider Road,
Rolling Hills, California, by COAST GEOTECHNICAL, Inc., dated February 24, 2006.
2. Response to Geologic Review Sheet, for #2 Outrider Road, Rolling Hills, California, by
Coast Geotechnical, Inc., dated July 19, 2006.
3. Response to Geologic Review Sheet, for #2 Outrider Road, Rolling Hills, California by
Coast Geotechnical, Inc., dated April 17, 2008.
4. Geologic Progress Report for August 2007, dated September 18, 2007.
5. Geologic Progress Report for September 2007, dated October 6, 2007.
Ms. Kim:
This final as built geologic report for the referenced property has been prepared at your request and
is a summary of periodic geologic observations made by Coast Geotechnical during construction
of your project.
PROPOSED GRADING
The project consisted of the construction of level rear property areas with contour changes
accomplished through slope construction, cuts, fills, and, retaining wall construction. Grading
performed is depicted on a plan by Bolton Engineering dated revised 3/31/08 and has been utilized
as the base map for presentation of site geologic data.
GEOLOGIC OBSERVATIONS
Geologic observations during grading were as follows:
• As built geologic conditions are as shown on the appended As Built Geologic Map, Figure
1. Geologic conditions encountered were in accordance with those discussed in the
referenced reports. Geologic conditions considered adverse to the proposed site
improvements were not encountered.
Mr. & Mrs. Kim
2 W.O. 303806-04
Final Geoloev Report November 5. 2008
■ Keyway A, fill slope near pool, was excavated a minimum of two feet into bedrock at a
depth of six to ten feet below original grade, with a width of about twelve feet. The
exposed bedrock was judged to be competent and to exhibit favorable geologic structure.
Section A -A, appended on Figure 2, shows as built conditions.
• Keyway B, fill slope at rear of property, showed a minimum embedment of three feet into
competent bedrock at a depth of five feet below original grade, with a width of about
twelve feet.
■ The project soils engineer observed subdrain placement and monitored fill placement.
• Periodic observation of grading found benches to be placed into competent bedrock
material with favorable geologic structure.
• Geologic data obtained during observation of site construction has been plotted on the
enclosed As Built Geologic Map, Figure 1.
■ Construction of the MSE wall was under the observation of the soils engineer.
DECLARATION FOR COMPLIANCE WITH BUILDING CODE SECTION 111
It is the opinion of the undersigned, a duly certified engineering geologist, based upon our work as
outlined in this report and in those referenced by it, that outlined work was constructed in
accordance with our recommendations and that if properly maintained, (1) the proposed grading
will be safe against hazard from landslide, settlement, or slippage, and that (2) the proposed
building or grading construction will have no adverse effect on the geologic stability of property
outside of the building site. The nature and extent of observations conducted for purposed of this
declaration are, in the opinion of the undersigned, in conformance with generally accepted practice
in the area. Finding and statements of professional opinion do not constitute a guarantee or
warranty, expressed or implied.
We appreciate this opportunity to be of service to you.
Respectfully submitted:
COAST GEOTECHNICAL, Inc.
TO4
Todd D. House 1 ta;� TODD D. HOUSEAL
CEG 1914 Exp 04�1`( O.1s1a
CERTIFIED
ENGINEERING
c...-A GEOLOGIST
0
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\REE:
1 20'34"
R = 500,00'
i = -965'
L= 9 98'
TREES
DENSE TREES
g �
t
CONC
CONC
FF''
AflQc/Tm
EXISTING RESIDENCE
Finished Floor 595.43
EASEMENT
20' SIDEYARO SE
ADD WALL AT TOP- OF SLOPE
REVISE DRAINAGE
GRADING PLAN
(ut
Restricted use area to ten feet
beyond back edge of geogrid
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Uknt:
Mrs. Ruth Kim
#2 Outrider Rood
Rolling Hills, Cc. 90274
..CUTSLOPETOBEe
'STAaIL2EDD Fel B
585'04'45"W
471.30'
Bolton Engineering
707 Silver Spur Rood
Rolling Hills Estates,
Pnone (310) 544-8010 Fox
49°
Drain pipe outlet-.
Corporation
Ste. 201
CA 90274
(3t0) 544-045B
23°
TT4
Erosion fromfocuseBRUSH
d otT ite drainage
AS BUILT GEOLOGY MAP
13°
1T
15° '566.6 2
20'• SIOEYARD SETBACK
20' S10EYAR0 SETBACK'
110.
' Stu tnpl I, Slump
15°
ICOAST GEOTECHNICAL, INC.
LEGEND
Afd
Af
Qc
T1n
TT1
ors %man
END. 2x2 R.0 E. 112ti4 N 80w Of CORNER _l� b'
10' EASEMENT— \
\
Documcntcd artificial fill
Artificial lilt
Colluvium
Monterey formation
Tcst pit by Coast Geotcchnical
Tcst pit by 1'ionccr
Test pit by Elden
Bedding by Coast Gcotcchnical
Bedding by Pioneer
Geologic section
Geologic contact
Slump
W.O. 303806
EASEMENT
TREES
543.2
1
525
Scale 1" —40ft.
Figure 1
600 —
Existing
house
580 ..
560 —
540
Existing
pool Af71
\t
Restricted use area to ten feet
beyond back edge of geogrid
Shows finish grade
_l
MSE wall
Afd-I
T Qc
Keyway A
Footing per
soils engineer
Shows finish grade
Original grade
Tm
- h Afd
1- ` '—
Keyway B
Shows typical keyway
and benching
GEOLOGIC CROSS SECTION X-X'
COAST GEOTECHNICAL, INC.
7,
Shows finish grade
Qc
Scale 1" — 20ft. (H=V)
W.O. 303806 Figure 2
COAST GEOTECHNICAL, INC.
14747 Artesia Blvd., Suite 1-D, La Mirada, CA 90638 Ph: (714) 521-0169 or (714) 521-2827 Fax: (714) 521-0179
GEOLOGIC PROGRESS REPORT FOR AUGUST 2007
To: DPW -Geology Attn: Charles Nestle Date: 9/18/07
From: Todd Houseal Subj: #2 Outrider, Rolling Hills
Charles,
Submitted is the August geologic progress report for #2 Outrider, Rolling Hills, California.
Fill slope construction continues with geologic structure exposed in benching consistent with that
reported in approved project reports. Adverse or changed geologic conditions were not exposed.
SWN Soiltech is performing geotechnical testing.
Todd. D. Houseal
CEG 1914 Exp 4/08
COAST GEOTECHNICAL, INC.
14747 Artesia Blvd., Suite 1-D, La Mirada, CA 90638 Ph: (714) 521-0169 or (714) 521-2827 Fax: (714) 521-0179
GEOLOGIC PROGRESS REPORT FOR SEPTEMBER 2007
DPW -Geology Attn: Charles Nestle Date: 10/6/07
From: Todd Houseal Subj: 2 Outrider Rolling Hills
Charles,
Submitted is the September 2007 geologic progress report for 2 Outrider Rolling Hills, California.
No geologic observations were provided during this month. To our knowledge grading is being performed
under the observation of the soils engineer SWN Soiltec. The as built geologic report will be prepared
upon the civil engineer completing the as built grading plan.
Todd. D. Houseal
CEG 1914 Exp 4/08