HomeMy WebLinkAbout30578 (47)TRIAD FOUNDATION ENGINEERING
fFoundationEngineering • Engineering Geology ,P
Material Testing * Construction Inspection)
17231 EAST RAILROAD STREET, SUITE 100, CITY OF INDUSTRY, CA 91748 ,
TELEPHONE (918) 964-2313
FAX (818) 810.0915'
Subj ect:
Reference:
Gentlemen:
November 29, 1989
JOB # 88-494
Revised Updated Geologic Map
22105 Rim Fire Lane
Diamond Bar, California
1) Updated Geologic Map
By Triad Foundation Engineering, Inc.
Dated November 7, 1989
2) Preliminary Soils and Geologic Investigation
By Triad Foundation Engineering, Inc.
Dated September 8, 1988; March 21, 1989,
July 3, 1989, and July 14, 1989.
Pursuant to your request, the updated Geologic Map from the
referenced report has been revised to show suspected creep affected
rock on landslide material in the northeast corner at the property.
Test Pit -3 log has been changed to show the top 3 feet at bedrock
to be possible landslide or creep affected material. The shear
attitude shown on the log was not related to any surface
instability.
The opportunity to be of service to you on this project is
12
appreciated, and if you have any questions, please call at your
convenience.
loom
TRIAD FOUNDATION ENGINEERING, INC.
John L. Kn Z
C.E.G. 1209
JLK;FCS/vrm
Reviewed by.* Frank C. Stillman
G.E. 805
Test Pit -3 Log
Geologic Review Sheet
S
000-0.
F%
Distribution: Addressee (4)
ED
JOHN ,,, KNIFFE3
No. 1209
CERI IFIED
ENGWEERING
UP. to
0F
Description (color, moisture, density, etc.
gra ATTITUDE I UVZME«
Bedding F - Fault0 M` m
0
at C tact,
53,222
TOPSOIL: Clayey SILT with Sand Dark Brown
slightly mosit, very firm, trate to slightly
MLorous
care Sand, Brown
Suspected Landslide or Creep Affected Material
Interbedded SILTSTONE & Fine Grained SANDSTONE- DS'TONE-
GreyGray& Brown, dense, zoderatelweathered &
S fractured
lU, 18 NGT - on irregular surface
4
ear° --NZOW- 575V
Undisturbed Bedrock
Slightly reathered, difficult to excavate
Little or no fracturing
BN7W 1 SW
7
S
END OF TEST pll" 6.5 FELT
No Ground Water or Caving
10
11
12.
1-
14_
f
I
1
GEOLOGIC REVIEW SHEET
Of t, '0-,tAngeles County Department of P, Sheet ubl'ic. or
uy 900 South Fremont Avenue, Alhambra, CA*91803
STATUS CHECKS (818) 458-4932 LAND DEVELOPMENT DIVISION (818) 458-4923
Tract/PM Lot(s)
Parent Tract Location /Ke 11re eA--2
Site Address 2-2-0-IC7
Geologist Developer (f 4
Geotechnical Engr. "? Engineer/Arch.
111"
aly (e4_ V
Dist. Office
F NF
DISTRIBUTION
District Office
Geologist
Geotechnical Eng
I Section File
Grading Section
Civil Engineer
Review of:
Grading P.C. No. Od4v;ll Building P.C. No. For: 41-e
Geologic Report(s) Dated
Geotechnical Report(s) Dated
Geology and Geotechnical Report(s) Dated 4— Z_ ao-q
Action. _ Plan Is geologically approved. -'—Plan is not approved for reasons below.
Plan approved geologically subject SUBMIT PLANS FOR RECHECK. Include a copy
to conditions below. of this review.
Remarks.
1. _ A consulting, _ engineering geology, _ geotechnical engineering, report(s) is required which
evaluates(s) this specific plan, and make(s) recommendations.
2.All recommendations of the consulting _-geologist, 4 --geotechnical engineer, must be incorporated
in the design or show as notes on the plan.
Cl,) The plan must be specifically approved by the A—consultantgeologist, k-- consultant geotechnical
engineer by _ letter -report and/or —manual, original signature(s) and date(s) on each sheet
prior to approval by the Geology Section.
4. _ In -grading inspections must be made by the consulting _ geologist, _ geotechnical engineer.
Monthly in -grading inspection reports must be submitted directly to the Geology and Soils Section
U the consultants.
S. _ Rough grading must be approved by a _ final geology report, _ final geotechnical engineering
report, prior to approval by the Geology & Soils Section. An As -Built Geologic Map must be included
in the final geology report.
Foundation and/or wall/pool excavations must be inspected and approved by the consulting
4egeologist, Je'Geotechnical Engineer, prior to the placing of steel or concrete.
7. The Geotechnical Engineering Unit's — approval is attached, requirements attached,
4 -conditions of approval are attached, _ approval is required (Review is dated
8. Shaw all proposd tentative corrective measures (buttresses, stability fills, subdrains, deep
removals, etc.) on the plan.
9. Add above, as notex-10 the plan.
10. Thegeologist, and/or — the geotechnical engineer, must make a finding in accordance with
Section 309, Los Angeles County Building Code,
Comments: It- 'Ve ?- fp(T- /(,/%9
e' Ve- C_ C^e6 rleeele ee-r1,4-.0
X1016 Yed rz/l
Prepared by'!! DateweRevie
48-0052 DPW 11/88 v
GEO1--HNICAL ENGINEERING REVIEW SHEE'
I
COUNTY OF LOS ANGELES
Address. 900 So. Fremont Ave. DEPARTMENT OF PUBLIC WORKS
Alhambra, CA 91803
Telephone: (818) 458-4925 Land Development Division
Single Family Residence
Tract 30578 Lot a& 6
Location 22109 Rim Fire ane Diamond Bar
Developer/Owner Coc5ran
Geotechnical Engineer Triad Foundation Engineering
Geologist Same as above
Grading Plan Check No. 0861
Review of:
Grading Plan dated.by Processing Center 11/7/89
Addendum dated 11/7/89
Refer to references in review dated 7/27/89
Action:
District Office 10
Sheet 1 of 1
DISTRIBUTION:
1 Grading and Drainage Sect.
1 Geo/Soils Central File
District Engineer
Geologist
1 Geotechnical Engineer
1 Engineer
From a Geotechnical Engineering Standpoint, Plans and Reports are approved subject to
conditions below:
Remarks:
The Geotechnical Engineer must review the grading plans and sign and stamp the plans in
verification of his recommendations and the recommendations of the approved geotechnical
report.
Prepared by !---
N.0661
Paul Chang
W
Date 11/14/89