HomeMy WebLinkAbout30578 (501)TC.
FRC:? :
DATE:
Re:
T,"e Diamond Bar Development Corporation
Carol, 594-1689
4-8-85
Request for Engineering Package, Lot 12 , Tract 30578 .
I/Fie the undersigned, hereby request that The Diamond Bar
Development Corporation furnish us with copies of soil and
geological reports, sewer plans, grading plans, and tract map on
the above referenced lot.
I/Ve understand that the information provided by The Diamond
Bar Development Corporation is provided for information only and
that The Diamond Bar Development Corporation does not imply or
cuarantee the accuracy of the information contained therein.
A check in the amount of $25.00 is attached hereto to cover
the copying expense of The Diamond Bar Development Corporation.
Signature
Signature
FOR OFFICE USE ONLY:
Logged
Del
Chk.
Rec.
Ordered
Follow-up
Chk.
Transmitted_
THE DIAMOND BAR DEVELOPMENT CORPORATION
F
To Carol, 594-1689 Subject: Soils & Geology Pkg. ,
Lot 12, Tract 30578
L
J
Date 4-15-85
Enclosed per your request are copies of the tract map, sewer and grading plans,
and soils and geology report for subject lot.
This information is provided for reference only. You should have your
engineer verify and/or update the data prior to preparation of the building
plans.
Very tr y ours,
nald E. Ury
ice President
DEU:fnc
DOUBLE .5C7AL,'
ho/d
. Each
1 i-
S,9N DIM4.5 BLDG. DIST. NO. /10.
1.
PROVIDE STAKES ON THE PROPERTY LINE OR PROPERTY LINES PRODUCED AT RIGHT ANGLES l0 THE SEWER LINE AT THE CENTER LINE
OF EACH MANHOLE.
2.
NO REPRESENTATIVE OF THE COUNTY ENGINEER WILL SURVEY OR LAY OUT ANY PORTION OF THE WORK.
S.
THE PRIVATE ENGINEER SHALL FURNISH THE COUNTY ENGINEER WITH GRADE SMEETS AND STATIONING FOR ALL MOUSE LATERALSANO
-ri, -r- BRANCHES AND SHALL PROVIDE STAKES FOR THEM AT THEIR (ROPER LOCATIONS WITH STATIONING PLAINLY MARKED.
ALL MOUSE LATERALS SHALL /E CONSTRUCTED IN A STRAIGHT ALIGNMENT AT RIGHT ANGLES FROM THE MAIN LINE SEWER EXCEPT
AS SHOWN ON THE PLANS. MOUSE LATERALS FROM CHIMNEYS SHALL NOT HAVE AN ANGLE OF LESS THAN AS' WITH THE MAIN
LINE SEWER. ANY CHANGE IN ALIGNMENT SHALL BE REQUESTED IN WRITING BY THE PRIVATE ENGINEER.
I.
EpGE Of PAVEMENT
THE PRIVATE ENGINEER SHALL FURNISH THE HOUSE LATERAL DEPTH AT THE PROPERTY LINE BELOW THE TOP OF(4/RSELEYATION PA V
FOR EACH MOUSE LATERAL ON THE GRADE SHEET.
S.
NO REVISIONS SHALL BE MADE IN THESE PLANS WITHOUT THE APPROVAL OF THE COUNTY ENGINEER.-
6.
THE CONTRACTOR SMALL NOTIFY THE CONSTRUCTION DIVISION BY TELEPHONE, MAD►SON 9-067, EXT. /1351, AT LEAST TWENTY.
FOUR HOURS BEFORE STARTING ANY WORK UNDER THIS CONTRACT.
7.
1
-41/ `frA/cIiiree s-4-Pll hee-,1Xor Br.c/r rrr.1n/'ia/ir/-erSd 01`0recorlCor7crere n77J7A1/d/",0ere�
ezee,cf gr "led,
/.
'Yer T �6ynefier may � rriea�frconncc,ioru fi r�s�irs/.x tewe� e.�ee�o>/
>r no>/eo!
1.
MANHOLE TOPS IN UNIMPROVED RIGHTS -OF -WAY TO BE SIX INCHES ABOVE FINISHED GRADE.
10.
USE EXTRA STRENGTH PIPE. ALL PIPE I$ STANDARD DEPTH EXCEPT AS NOTED. •
11.
/
✓ifrit/d•O e��t�p%otJsirr/t XA91/be lyve??�F�rGjoer�r><a/7�����ecifc�Y'InJ Secion?Qd-2
12.
IF A POWER POLE 15 WITHIN THREE FEET OF THE SEWER, TH6 SEWER SMALL BE ENCASED, PER S-22, TWO FEET ON EACH SIDE FROM
THE POINT OF INTERFERENCE.
13.
IF DURING THE COURSE OF CONSTRUCTION IT IS DETERMINED THAT THERE IS LESS THAN FOUR FEET OF COVER OVER THE TOP OF A
MAIN LINE OR MOUSE LATERAL V.C.P. SEWER WHICH IS NOT INDICATED ON THE PLANS, THE PIPE SHALL BE ENCASED PER S-23, UN-
LESS OTHERWISE APPROVED BY THE COUNTY ENGINEER.
11.
-
HOUSE LATERALS TO BE CONSTRUCTED WITH INVERTS AT PROPERTY LINE 6 FEET BELOW CURB GRADE OL EDGE ar meArmeMT
6)CAOE, ff X L 6!'T .4,9 /VO 7'A"
NC
15.
RESURFACE ALL TRENCHES WITHIN PAYED AREAS TO MEET LA. COUNTY ROAD DEPT. OR CALIFORNIA STATE HIGHWAY REQUIREMENTS
CL
IN ACCORDANCE WITH PERMITS..
PC
16.
/
Sew/�el- //o 16e fesleo 1ir 1e.9�a9e per Xie.4O,7 306 - ?, 3, 7 i/ }�e S><and�r0 Shoe., c�17on1
T„
17.
/i Sie11;a 7-/0, 4, J, of'>��ieS�rn�ar/p�-.?/�oe�ei�/ca e+ss .Pi9ar/�n9/5�
/l.
r; i�•ein 1 6efwcen tv r�i�in,po i/oe an0 v/ir.!/mod c /ary p ��e .Sh.�// Oe iTr>Oe i/� �v rib-
6« s/eere �O/iT% , fy� C' or D -. �.�ff, h �r /i:n9 .�neG essa�YPer' Sf�rsdai'o'Spscr.c�fors
to
cc
♦
LO,
REP//S/DAP NQ 4 2 8 DUNE �/
/. ylordiny in SPccio/AJofc
2. Rcmo v� d Hafts, nos. /90 �'/9 b .
A PPRO VED7Zw,
- Off/GE Of L�uW7yEA�6iuf�P
COLLECT CHARGES
AS INDICATED
- ►Rc
NOTICE TO CONTRACTOR
The existence and location of any underground
utility pipes or structures shown on these plans
are obtained by a search of the available records.
To the best of my knowledge there are no existing
utilities except as shown on these plans.
The contractor is required to take due precau-
tionary measures to protect the utility lines shown
and any other lines not of record or not shown on
these plans.
R.C.E. 87S7
K
.-
U/'eED THE FOL L Ow/NC X of 7'E.ST R1Y1SE0 : STAAIZ 4RO
'Q2'1c74Fa ALAM ON F/LE /N 7-A OFF/CE OF TNF COU�t/TY ENC/NEFR
rA1.4A141-
TiVE S'HA L L f1 RJ1'L Y /A/ THE C4A14 TCUCT/Ot! OF TNI.s f0',e0.1EC r
cTs cro. l cycl7d - S-/
ND/V/liDN Minirr�urn _��o6/,r s2��fy 2e9�;.�,r,��fs s-
ED,
,8ri clt Mantic% S- -�
/Von - /?eir� forcca' Precas/ conci-cfe 17cle 5'--f
.P�in/or•ced Pcecssf Concr�fc Manhole 5- �
Mani o/Cj Frdrn l� and cove,--
$-/.mil
5-17
13eF&Aver p,;oe
L'cac/,�9 .and ea�a serr,e�,�
-23
m Wye or iee supporf
s-QG
ncho,1- BLOCK
S-2¢
v 0� ,BAFFL E .8 0AR0 OETA/L
v CN/MNEY
s Z�
��cfar/9U /�� ,t�/a.� Rio% Fi-a,>►�e ¢" Co �e'rS
. -� /C
x M4 P
N° 30578
cool
REV/S/p V -1 -24 - 70 C%4NaSP -AL/GN NT PAGES Z3
24 ?S TO p,rrLF- T /NTO EX/JT/N6 M, 25t88, 00 P,Z?
P..0 6GG.�.DEGETE V/Elt�PAG 78,A 'VIEW f'Ar!iE ZGB.
C,yANGf_ ST.47f7w/NG P6. 2• i
iPC.E CO -2 - 70
�4 a '
APPROYEO = `OFF cE OF COU Ty- ENG/NEE.P PA TES,
5" t Ja f A/o,4rs s
,l The CanJv/rl,,,t Gee/eyist and Soils E179intei ,✓/vJf' inJpecf
anal approve JOhe For Sewers o/any, '*-/i7de,
Rood qnd o//ofhcr orcas noe w;A1,7 the sficctri9h of-
Woys, /vrior to OPProvc/ by 75$c Enyiaccriny Gco/oyy
Scctior�. .
Z. SOA7G Df The LorS /vfiy ,Qcq_,rc !„div,dd./ hors fio/d
Jezoafe pw.'�Pt .ondfor Boct�tlotci- Ya/JCS. L�ocii
L0f.Sllo&/W6e Checeed Ac /ssuonce of house
So oonueations for tba'Umpoml et
industrtal faates sb&Ul
sewars sbotn oa taas• tr"U"
vO fithout nrittaa yamissi= rm tts .
MIST *cineer aw Oansral MuLetr -
R!4/5E0 SEWER/AVERTS, of the County Sauibstias DINVI'IU . .
100T0 57A_3000; A96e154 3TA
:P 5rw 1857 6LTfthons
ntj 5�-.1r.:; ±o� �, i to shall be
c / ified t_ ic- 1,3 t.'W .; ay :oxing so
ah
/ t requiroo �.uepectioz oan be made
337-1025
54,
NOTES:
1. PROVIDE STA-
OEEACH MA'
2. NO RE/RESET
3. THE PRIVATE
T-ar 'r' RR/
ALL HOUSE 1,
AS SHOWN c
LINE SEWER,
A. THE PRIVATE
FOR EACH HC
3. NO RFVISIO�
�r04mce of the Qro!
2� h
do•
e
• N ,
40
00,
of
�, da
00000,
40
•
jo
op
47
' V
is 1" wr-y --. .a �?\� � � � ,' Q•.
AldAtdw
dip dl
�. �'
• - � 4r � ����/ .. •ram N
41
+`Tv',� ` M'`,ntl,, � / � jam/•. � � . • � F.. � ` I ..�; • � �, Q•� ��
,''rW • ��. W N yIrh e _ .a,ss Art?47 A.�.
Met A
�. : r . • fr , ,,t ;�:' N':. �u�t•ao wE�IDERFOOT'P''�k'`�-�S�po.
N 4�- d 10 ae , y
' ' � -ti � •'""t',uL'T.jT�eya, T'S'Q7 —..•.• •�� ,%M3e`•. !2%q�.,
J'J 80 4"m 21
747
• y ••- a U e 7
A �„ ra 0.79 �•
Anr� . D• G3 Ac• h .i - .
Awj
` N '
lEe 3CIAd'/1f Of lilM.' Gn1Iy 0l
toy A,igMl�s sir SOP/to/yto
a , + • ti h .. �r O,%�✓ ry
,!
sew+0r ecAdi
A!6/�Ii•SI•W ?OZ.00' ... o e ��• .$F �r . ," h AlC'A/e1! O.sm.!n
11� 42 �S .n •o a; .�2 t! V1 V1
tdob
71
a� r + 320,�3• �/ � � •fir ���'j3• ,,,. :r
,��•V/:.� J'/ t of }. •�.: �•':,►� �..
Robert Stone & Associates, Inc.
En.tineenng Geology • Soil Methanirs • foundation Studies
19720 Ventura Boulevard — Woodland Hills, California 91364
(213) 346-0565 — (213) 873-73B2
November 5, 1970
1-68-301-09
E. L. Pearson and Associates
1551 West Redondo Beach Boulevard
Gardena, California 90247
Attention: Mr. Garry Vander Mende
Subject: Final As -Graded Geologic Report,
Rough Grading Completed, Tract 30578,
Diamond Bar, California
Gentlemen: -
Wn, hp-wr^ mnrIe Ter-4-3ic Nr4c-'e." ceclogic JP.=..==cns :f =�=
ject tract during grading, as required by the Count' of Los
Angeles. Rough grading of the tract is not, completed. This
report presents our opinions resulting from these inspections
and supplements our prior reports.
Enclosed is the final As -Graded Geologic Map and selected cross -
sections. Cross -sections have been revised in those areas where
major design changes have occurred during the progress of the
grading. The revised sections reflect both the original design
and the final grading configuration. The final compaction report
will be forwarded under separate -cover.
Boring Logs A through X,-drilled during construction of the tract
have been included with this report.
The following reports have been submitted in conjunction with the
development of this tract:
E. L. Pearson & Associates
Novenber 5, 1970
1-68-301-09
Paqe 2
DATE
JOB NUMBER
SUBJECT `
1/13/69
.68-301
Grading Plans
2/3/69
68-301A
Addendum Geologic Report, Grading Plans
3/21/69
68-301B
Grading Plans Addendum
3/21/69
68-301C
Supervised Compaction Report, Pavillion
Area
3/24/69
fi8-301D
Geologic Report, As Graded Pavilion Lnd
Parking Area Sites
3/24/69
68-301E
Geologic Report, As -Graded Sales Office
Site
3/25/69
68-301F
Geologic Report Pavilion Area and Sales
Office Site
3/26/69
68-301G.
Additional.Data
3/27/69
68-301H
Graded Slopes South and East of Pavilion
Site
3/31/69
68-301J
Addendum Supervised Compaction Report
Sales Office
4/4/69
68-301L
Addendum Geologic & Soils Report Lots
330 & 331
4/5/69
68-301M
Addendum Report, Fill Slopes
4/10/69
68-301M
Addendum'Geologic & Soils Report Proposed
Model Lots 127 & 135
4/10/69
68-301N
Filled Ground Report
5/l/69
68-3010
Design of Fill Slopes
5/8/69
68-3.01 MR-1
Monthly Report #1
5/12/69
68-301P
Alternate Design of Shear Keys
5/23/69
68-301Q
Addendum Report
5/27/69
68-301R
Redesign of Proposed Grading
5/28/69
68-3015
Additional Soils Engineering Information
Lots 170-176
6/17/69
68-301 MR-2
Monthly Report No. 2
7/8/69
68-301 MR-3
Monthly Report'No. 3 Geologic
7/11/69
68-301T
Lot 135
7/15/69
68-301U
Addendum Report Lot 135
8/28/69
68-301V
Redesign of Proposed Grading, Lots 46-49
7/28/69
68-301W
Lot 135
8/15/69
68-301 N,R4
Monthly Report No. 4
Robert Stone ` Associ.Aes
E. L. Pearson & Associates
November 5, 1970
1-68-302-0�'
Page 3
DATE
JOB NUMBER
SUBJECT
8/25/69
68-301SDIR-5
Semi -Monthly Report No. 5
9/10/69
68-301Z
Redesign of Proposed Grading Lots 68-69
9/11/69
68-301SI-IR-6
Semi -Monthly Report No. 6
9/22/69
68-301Y
Review of 5:1 Cut Slope North of
Pavillion Site
9/23/69
68-301-00SMR-7
Semi -Monthly Report No. 7
10/8/69
68-301-00SMR-8
Semi -Monthly Report No. 8
1/9/70
68-301-OOZ
Supplementary Report, Lots 68 & 69
10/20/69
68-301-OOAA
Redesign of Proposed Grading Lots 59-62
10/22/69
68-301-00SMR-9
Semi -Monthly Report No. 9
10/30/69
68-301-00SMR-10
Semi -Monthly Report No. 10
11/5/69
68-301-OOAB
Redesign of Proposed Grading Lots 50-55
11/7/69
68-301SMR-11
Semi -Monthly Report No. 11
11/10/70
68-301-OOAC
Supplemental Geologic and Soils Report,
Lots 59-62
12/11/69
68-301-OOSMR-13
Semi -Monthly Report No. 13
12/23/69
68-301-OOSMR-14
Semi -Monthly Report No. 14
1/-+ '"'
,, , c
8 -fi n , �.r•n_ 1 5
6�-���-oo�..�. �.,
S - � � ly Rc r 1T.. l _
��::1i r on�h r po_ _ _._. __
1/12/70
68-301-01
Geologic Report Lot 81
1/27/70
68-301-OOSMR-16
Semi -Monthly Report No. 16
2/2/70
68-301-04
Compaction Report, Lot 135
2/2/70
68-301-04
Geologic Report (Rough Grading Completed
Lot 135
2/5/70
68-301-04A
Addendum Report, Lot 135
2/27/70
68-301-02AD
Additional Information Steeplechase
Shear Keys, Lots 23-30 and 170-176
2/5/70
68-301-04B
Addendum Compaction Report Lot 135
2/24/70
68-301-03S2•IR-17
Semi -Monthly Report No. 17
3/6/70
68-301-03SIIR-18
Semi -Monthly Report No. 18
3/26/70
68-301-03SMR-19
Semi -Monthly Report No. 19
4/7/70
68-301-03SMR-20
Final Semi -Monthly Report No. 20
5/4/70
68-301-07
Study of Soil Cement I";ixtures
5/11/70
0-0153-00
Final Geologic Report Lot 148
5/12/70
0-0153-OOA
Foundation Engr. Report Lot 148
7/22/70
68-301-12
Addendum Geologic Report (Rough Grading
Completed) Lot 81
8/17/70-
68-301-12
Lot 81 Mayes
8/20/70
68-301-12
Geologic Insnzcticn F:evort Lot 81 I•:ayes
Robert Stone & Associates
E. L. Pearson 6 Associates 1-6t-301-09
November 5, 1970 Page 4
CONCLUSIONS AND RECOtDIDNDATIONS
General
1. From a geologic standpoint, the subject tract is favorable
and has a safe building area on each lot. Additional geo-
logic review will be required in those instances where a
grading permit is required or in special circumstances
where unusual building design warrants this review. General
foundation recommendations for each lot will be included in
the "Soil Engineering Report on Compaction Testing".
2. The geologic recommendations which we made have been followed.
Cut Slopes
3. The cut slopes on the subject tract -will perform in a satis-
factory manner. Future cut slopes propoced for individual
lot development should be reviewed by an engineering geologist
if they exceed three feet iri vertical height. Cut slopes which
would undercut bedding or disturb existing stabilization
measures as shown on the final "As -Graded" Geologic Idap should
be avoided.
Restricted Use
4. Restricted -use areas have been established on Lots 15-17, 35-43,
46-55, 58-69 and 168-181. The revision of the restricted -use
line on Lots 42, 43 and 46-50 was necessary when additional
data concerning the limits and depth of )Qls-4 were obtained.
.See the As -Graded Geologic Map.
Lots 187 and 188 may require restricted -use areas on comple-
tion of a geologic investigation. A complete geologic investi-
gation will be necessary prior to any grading operation on
these lo_s.
Robert Stone & Associates
1
F. L. Pearson and Associates
November 5, 1970
Shear Keys and Buttresses
1-68-301-09
Page 5
5. Shear keys have been constructed on Lots 47-55, 58-G9 and
170-176. All shear key removals were inspected and approved
by an engineering geologist prior to the placing of compacted
fill.
6. Buttress fills have been placed along Steeplechase Lane adja-
cent to Lots 11, 12 and 15-18, Lot 44 adjacent to Rimfire Lane
and also along Wagon Train Lane adjacent to Lots 70-74 and
76-80.
I\ Subsurface Drainacrs
7. Subdrains have been placed in all shear keys and buttresses
except in the buttresses along Steeplechase adjacent to
Lots 11, 12 and 15-18. The height and key -width of the
:,CCtti�� 3.uSe L411C buicr`sses did not y:arranIZ. t::: ..Z� �f -
drains; however, paved drainage terraces have been placed on
top of the buttresses at the natural -fill contact for the
removal of water from the buttress area.
Subdrair_s have been placed in canyons beneath: fills in Lots
104, 105,109, 110,-113-115, 123 and 124.
All subdrains were inspected by an engineering geologist and
soils engineer prior to placing compacted fill.
Canyon Fillinc and Preparation
8. Fill has been placed in canyon bottoms in Lot 15-adjacent to
Steeplechase Lane; Lots 19-21, 74 and 75 east of t-?agon Train
Lane; Lots 87-69 adjacent to Rocky Trail Road; Lots 103-105
between Kicking Horse Drive and Rocky Trail Road; Lots 108-•110
Rober: Stone & Associates
E. L. Pearson & Associates
November 5, 1970
1-b8-311-09
Page 6
adjacent to Wagon Train Lane; in the area of Lots 111-117, 123-
125 and 162-165, and portions of Lazy Meadow Drive. See the
supervised compaction report for test results and foanda,tion
recommendations.
9. Canvon cleanouts were: individually inspected by an er.cineering
geologist prior to the placemt_nt of fill.
Slide Removal
10. The upper portion of landslides was removed and recomnacted
on Lots 47-49 below Wagon Train Lane, Lots 77-79 above Wagon
Train Lane, and Lots 24-27 above Steeplechase Lane in order
to provide a stable building site.
Sewage Disposal
11. The traces :.,ii 1 ut- i ; za =-!ers . Fith the eycepti rn of ti,e
force main excavation between Lots 155 and 156, sewer alignment-
constructed alone ease,-,ents Vere mapped and inspected by an
engineering geologist prior to backfilling. The force main
excavation has not been made as of this date. The information
obtained in our inspections is shoran on the attached Geologic
Map. The sewer alignments inspected to date are geologiCallt7
favorable for the intended use. We will inspect and report
on the force main excavation at a later date.
Offsite Grading
12. Off -site grading completed in co -injunction with adjacent tracts
shall. be reported with those tracts e}:cept where this grading
extends into Tract '-1"0289.
Robert S:orfe &- At soc:.-.!Cs
E. L. Pearson & Associates 1-65-301-09
November 5, 1970 Page 7
Planting
13. We recommend that the compacted fill slopes and cut slopes
which expose deep soil cover be planted as soon as practi-
cable to minimize erosion.
Deleted Canvon-Fill
14. A canyon fill shown between Lots 39 and 43 on the originally
approved grading plan was deleted during construction. This
fill was never on the base map for our geologic maps and is
not required from a geologic viewpoint.
Very truly yours,
ROBERT STONE & ASSOCIATES, INC.
By
Monte E. Rasp, Engr.Geologist
And By / �^ ,=--7,!
Rober - Stone, 'Ph.D., President
MER/RS:caa
Enclosures:
Geoloaic Maa
Sheets 1A-7A
Cross Sections:
B-2, G, J, Q
Boring Logs: A-X
Distribution:
4 Client
2 County of I.os Angeles
(1 Dept. of Bldg. & Safety;
1 Geology Section)
; ubert Stone u Associates
Diannond Bar
-�� ► =:. PLANATION
Ranch
001S
OL
10:031
J cnd shale. '
and dip of bedd�r9 (recorded during grod.r.; ,
•.
�• -,,r• �� Stoke
of oaing Host
Q'j' ,a L2 . n� investigotion)
:.c_Knoe pits-%
,recorded during ong
' t ir�d fra;n ccr:ry.�
>" 4 bedding,
f o� a
`L Strike and J:• o
of Fc: or snear piana.
Strike and dip .._
B �.• _aUC�(c� g- cu ar boring.
•-c1!g 1 .n
^� _ Depth+8 • �n�Jr DedC:
#' zy _ .Moore and Taber.
M� bo":r.g :,Y
i. So,khoe pi, wnere !:C strike and p
- 3a.xno. or "Ido_'er french
1. l .��+.A/
_ Contact, approximately Loca'.cd.
\ t Locations of Cross Section included in r,:A P
GEOLOGIC
by
ROBERT STONE 8� ASSOCIATES, INC.
I 19720 VENTURA BOULEVARD %(,.,'�,t,�•r,�.
-68-301-09 CALIFORNIA
WOODLAND HILLS,
_ P ARSON SSOCIATES_;--f=--
ENGINERING ,. �- �-`
Soil Engineering Report on Compaction
Testing, Tract.30578, Lots 1 through 188
and Tract 30289,: Lots 6 through 8,
Diamond Bar, County of Los Angeles,
California
Robert Stone & Associates
Robert Stone & Associates, Inc.
Engineering Geology • Soil Mechanics • Foundation Studies
19720 Ventura Boulevard — Woodland Hills, California 91364
(213) 346-0565 — (213) 873-7382
November 5, 1970
1-68-301-10
E. L. Pearson and Associates
1551 1,1est Redondo Beach Boulevard
Gardena, California 90247
Subject: Soil Engineering Report on Compaction Testing,
Tract 30578, Lots 1 through 188 and Tract 30289,
Lots 6 through 8, Diamond Bar, County of Los Pm9eles
California.
Gentlemen:
This report presents our opinions pertaining to the compacted
fill placed on the subject p-roperty.
L abcratory Standard AST14: D 5 57-6 4T, ynoa i f i ec7
4 inch diameter. mold, 1/30 cu ft
3 layers, 25 blows per layer;
10 lb hammer, dropped 18 inches.
Soil Type
Maximum Dry Optimum
Density Moisture
(ps f ) M
I
Tan Coarse SAND
130.1
12.4
II
Tan Medium/Coarse SP14D
117.0
13.0
III
Tan Fine/Medium SAND
113.0
13.4
IV
Light Brown Fine Silty SAND
113.0
14.2
V
Light Brown Sand SILT_
108.5
16.7
VI
Gray and Light Brown SHALE
104.0
19.6
VII
Brown SILT
100.6
19.8
VIII
V%7hite/Light Brown Caliche and
Silty SAND
110.0
16.3
IX
Red -Brown Clayey SAND
119.0
12.0
X
Red -Brown Clayey Silty SAND
117.5
12.1
XI
Red -Brown Clayey Sandy SILT
113.2
17.5
E. L. Pearson and Associates
November 5, 1970
1-68-301-10
Page 2
XII
Dark-Brown•Silty
CLAY
97.0
20.0
XIII
Red -Brown Sandy
SILT with Clay
115.2
13.0
XIV
Fine Silty SAND
and Shale
105.0
17.5
XV
Fine Sandy CLAY
with Shale
107.0
16.0
XVI
Red -Brown and Gray Silty CLAY
99.4
19.5
XVII
Tan -Brown Silty
CLAY with Shale
•97.3
17.4
XVIII
Tan -Brown Sandy
CLAY with Shale
103.0
20.3
AIX
Tan Sandy CLAY
101.0
17.0
XX
Tan -Brown Sandy
CLAY
103.5
19.0
XXI
Tan Clayey SILT
with Diatomaceous
Shale
88.0
27.0.
PREPARATION OF NATURAL GROUND
- Prior to the placement of compacted fill, vegetation, brush,
trees, debris, and other deleterious materials were removed.
The canyon bottoms were cleaned of.loose soils and/or alluvium
as determined in the field during excavation by the supervising
soils engineer. The depths of removal to firm natural ground
varied from three to ten feet.
Subdrains consisting of six inch diameter, perforated corrugated
aluminum pipe embedded in gravel were placed as shown on the
attached grading plans.
METHOD OF FILL PLACEMENT
Fill soils were placed in lifts of six to eight inches in thick-
ness, watered as necessary to approximate optimum moisture con-
tent, and compacted to a minimum relative compaction of 90
percent of the laboratory standard.
Robert Slone & Associates
E. L. Pearson and Associates 1-68-301-10
November 5, 1970 Page 3
Fill slopes were compacted by back rolling, at intervals of
four feet in vertical height, with a sheepsfoot roller. When
the slope reached design height, the entire face was rolled
with overlapping passes of a sheepsfoot roller. Slope surfaces
were finished under supervision by one of the following methods:
grid rolling, track rolling or trimming to firm compacted soils.
EQUIPMENT
Equipment used in placing the fill consisted of bulldozers,
scrapers, sheepsfoot rollers and water trucks.
COMPACTION TESTING AND DEPTH OF FILL
Compaction test locations are shown on the attached As -Built
Grading Plans prepared by E. L. Pearson and Associates. Compac-
tion tests were made in each two feet of fill and the tcs-i_
results are shown in Table I., Compaction tests were made accord-
ing to ASTM:D-1556-58T.
The areas occupied by compacted fill are shown on the attached
grading plans. The maximum depth of compacted fill covered by
this report is about 75 feet.
COMPACTED FILL BUTTRESSES AND SHEAR, KEYS
Compacted fill buttresses were emplaced on the following Lots:
11, 12, 15-18, 44, 70-74 and 76-80.
Shear keys were emplaced on the following Lots:
47-55, 58-69 and 170-176.
RESTRICTED USE AREAS
Restricted use areas occur on the following Lots: 15-17,
35.-43, 46-55, 58-69 and 168-181.
Robert Stone R, Associates
E. L. Pearson and Associates 1-68-301-10
November 5, 1970 Page 4
EXPANSION TESTS
Expansion tests were performed on typical samples of material
obtained from the finished lots. These tests measure the verti-
cal linear expansion of soil specimens remolded to a relative
compaction of 90 percent of the laboratory standard. The speci-
mens are remolded at optimum moisture content. The specimens
are allowed to air-dry for 24 hours. They are then placed in
the testing devices and water is added to simulate a saturated
condition. The specimens are placed under a surcharge of
60 lb/sq ft and in accordance with the County of Los Angeles
standards. The percent swell is then measured when expansion
ceases, normally in 24 hours.
The results of the expansion tests are as follows:
Sample No.
A -Sandy Clay.
B-Sandstone
C-Siltst—nne
D-Sandy Clay
E-Clayey Sand
F-Sandy Clay
Percent Swell
(Under 60 psf Load)
9.50
2.50
4.90
10.00
1.60
4.85
A lot by lot breadkown of the various soil types is given in
Table II.
Robert Stone u Associates
E. L. Pearson and Associates 1-68-301-10
November 5, 1970 Page 5
SOIL BEARING PRESSURES
Recommended bearing pressures for desing of continuous foundations
and shallow pier foundations placed at the recommended depths
are as follows:
Firm Natural Soil
1000
lbs/sq
ft
Compacted Fill
1500
lbs/sq
ft
Bedrock
2000
lbs/sq
ft
Recommended bearing pressures for design of.caissons is 3000
lbs/sq ft at the recommended depth.
These values may be increased by 1/3 in designing seismic forces
and wind loads.
RECOI-U-IENnED LATERAL PPESSiTTZES
Recommended active pressures to be -considered in the design of
retaining walls arp as follows: ,
Surface Slope of Equivalent
Retained 2:aterial* Fluid Weight
Horz. to Vert. lb/cu ft
LEVEL
30
2 to 1
43
12 to 1
55
1 to 1
80
Recommended passive pressures to be considered in design are
as follows:
Robert Stone & Associates
E. L. Pearson and Associates 1-68-301-10
November 5, 1970 Page 6
Equivalent Fluid
Soil Type Weight lb/cu ft 1
Firm Natural Soil 250
Compacted Fill 350
400
Bedrock
A coefficient of friction between .the soil -and concrete founda-
tions of 0.4 may be assumed.
GENERAL FOUNDATION RECOMENDATIONS
A lot by lot analysis of the tract has been'made with reference
to foundation design. The analysis included a breakdown into
various categories by interrelating the type of earth materials
and their expansion qualities, and the angle of slopes on the
lots. The analysis was applied to what appears to be the most
probable building area on each lot. The results of the analysis
are presented in Table II.
Where more than one type of foundation category is shown in
Table II, the building official can determine the applicable
design criteria based on the location of the structures.
Robert Stone & Associates
1
E. L. Pearson and Associates 1-68-301-10
November 5, 1970 Page 7
I Foundations i-n Comnacted Fill Pads or
Pads Excavated in Bedrock
SLAB CONSTRUCTION
EXPANSIVENESS
DEPTH OF
SLAB
WALL
THICKNESS OF ROCK
(Swell)
FOOTING
REINFORCEMENT
REINFORCEMENT
BASE OR CLEAN
BELOW
4" NORMAL
SAND UNDER LIVING
60 psf LOAD
FIPIISH
THICKNESS
AREA AND ;MOISTURE
AIR-DRY TO
GRADE
BARRIER
SATURATION
0% to 30
.12"
6"x6"-10/10
Optional
6-mil Visqueen
Wire tsesh
1" Sand over
Visqueen
3% to 8%
1B"
6"x6"-10/10
1 - #4 @ top
4" + 6-mil Visauee:
Wire Mesh
and Bottom
1" Sand over
Visqueen
�.- s.
12 �o
24 I�
6 "!cG "-6/6
2 - �` S tcp
—
u'o �-o
Wire ?Mesh
and Bottom
1" Sand over
Visqueen
i
1,,700D
FLUOR TYPE CONSTRUCTION
EXPANSIVENESS
DEPTH OF
WALL
CONTINUOUS
PIERS
(Swell)
FOOTING
REINFORCEMENT
INTERIOR
BELOW
BEARING
60 psf LOAD
FINISH
WALLS
AIR-DRY TO
GRADE
SATURATION
0% to 30
12"
Optional
Piers
As per Code
-
Allowed
3% to 80
18%
1 - #4 @ top
1 - #4 @ top
Not Permitted
-
and bottom-
and bottom
Under Bearing
Walls
8% to 12%
24"
2 - #4 or-
2 - #4 @ top
Not Permitted
1 - #6 @ top
and bottom
Under Bearing
and bottom
i Walls
On the lots having soils that are over three percent expansive, surface
drainage and drainage of planters should be provided so that no grater is
allowed to enter the sL,Dsoils in or adjacent to the build_ng area.
Robert Stone & Associaies
E. L. Pearson and Associates 1-68-301-10
November 5, 1970 Page 8
II Foundations in Natural Soils
A. Slope of Building Area - 3:1 or Flatter
1. Foundations should be designed according to the
table given above under Section I.
2. Foundation excavations should be inspected by a
soils engineer to determine the suitability of
the soils *to provide the recommended bearing
capacity and to verify the expansive soil condi-
tions.
B. Slope of Building Area - Steeper than 3:1 to 2:1
1. Exterior and Interior Foundations: Continuous
foundations in;-o bedrock, 12 - •,.c` for
one-story buildings and 18 inches minimum for
two-story buildings. Reinforced according to the
following table:
Expansiveness Wail. Reinforcement
0 % to 8 % 1 - #*4 @ .:.op
and bottom
8% to 12% 2 - #4 @ top
and bottom
2. Pier Foundations: 18 inches minimum into bedrock
3. Bearing Surface: The depths of penetration given
above should be obtained in firm bedrock that is
unaffected by creep.
Robert Starve Associates
1
E. L. Pearson and Associates 1-68-301-10
November 5, 1970 Page 9
4.' Inspections: The foundation excavations should be
inspected by a soils engineer and an engineering
geologist to determine the suitability of the bed-
rock and to verify the expansive soil conditions
C. Slope of Building Area - Steeper than 2:1 to 1�:1
1. Exterior and Interior Foundations: Continuous
foundations into bedrock a minimum of 24 inches
and the outer edge of the footing should be a
minimum horizontal distance of five feet from.the
slope face. The footings should be reinforced with
a minimum of two No. 4 reinforcing bars placed at
the top and bottom of the footings.
2. Caiscn roundations: Thice feces. n.-niri= into bedrock.
Tied together by grade beams.
3. Bearing Surface: The depths of penetration given
above should be obtained in firm bedrock that is
unaffected by creep.
4. Creep Forces: These foundations should be designed
to resist a nominal creep force of 1000 pounds per
foot of soil and creep affected materials penetrated.
5. Inspections: The foundation excavations should be
inspected by a soils engineer and an engineering
geologist to determine the suitability of the bed-
rock and to verify the expansive soil conditions.
Robert Store & Associates
E. L. Pearson and Associates
November 5, 1970
1-68-301-10
Page 10
III Special Design• Conditions
The foundation plans should be reviewed by a soils engineer
and an engineering geologist for the following conditions:
A. Foundations on Cut, Fill and Natural Soils
(Any combination of two or more)
B. Foundations Encroaching on Stabilization Installations
C. Foundations on Slopes Steeper than 13�:1
Robert Stone & Associates
E. L. Pearson and Associates 1-68-301-10
November 5, 1970 Page 11
RECOMMENDATIONS CONCERNING ADDITIONAL GRADING
1. On lots where cuts are proposed in excess of three feet in
vertical height or where cuts are.proposed (any height) that
would undercut a dip slope or bedding plane inclination as
shown on the geologic map, a grading plan review by an
engineering geologist is recommended.
.2. If additional grading is proposed on any lot where stabiliza-
tion installation exists a grading plan review by a soils
engineer and engineering geologist is recommended.
3. Wherever proposed grading (primarily filling) would increase
driving forces above an existing stabilization device (even
if on another lot) a grading plan review by a soils engineer
and engineering geologist is rreco=--e ded.
4. When a grading permit is required, recommendations concerning
additional proposed grading such as fill placement, cleanouts,'
cut orientation and slope construction should be made when
the proposed grading is known.
5. In all other cases Los Angeles County requirements concerning
issuance of grading permits should apply.
Very truly yours,
ROBERT STONE & ASSOCIATES, INC.
GG:caa
By
Enclosures: Gerald Gorian, RCE 14698
Grading Plan
Grading Certificates
Table I, and Table 1I
Distribution:
4 Client
2 County of L. A.
(Dept. of Bldg. & Safety
and Geology Section)
Rober[ Stone & Associates
COU::TY OF LOS ANGELES
DEPARIHENT OF COUI:TY EMI i::'ER
BUILDING AND SAFETY DI V3 SI Ott
SIIPERVISF.D GRADING INSPFCTION CEPTIFICATF,
(To be filed in duplicate at the local building and Safety Office)
Job Address 30289 Diamond Bar
or Tract No. Locality
Owner Transamerica' Development Permit No.
® ROUGH GRADING CERTIFICATION
® BY SOILS ENGINEER
(A) I certify that the earth fills placed on the following lots were installed upon competent and
properly prepared base material and compacted in compliance with requirements of Building Code
Section 7010. I further certify that where the report or reports of an engineering geologist,
relative to this site, have recommended the installation of buttress fills or other similar
stabilization measures, such earthwork construction has been completed in accordance kith the
approved design.
LOT NOS. 6 through 8
See report dated 11/5/70 for compaction test data, recca:mended
allowable soil bearing values and other special recommendations.
EXPANSIVE SOILS (YES) (NO) LOT NOS. ALL
BUTTRESS FILLS (YES) (NO) LOT NOS. AT T
Remarks
Engineer J � Reg. No. 1469R Date 11./1;/7fi
Signature
Gerald Gorian
7, BY SUrExVISI i(i UhADII•:G ENGINEER
(B) I certify to the satisfactory completion of rough grading including: grading to approximate
final elevations; property lines located and staked: cut and fill slopes correctly graded and
located in accordance with the approved design; swales and terraces graded ready for paving;
berms installed; and required drainage slopes provided on the building pads. I further certi-
fy that where report or reports of an engineering geologist and/or soils engineer have been
prepared relative to this site, the recommendations contained in such reports have been
followed in the prosecution of the work.
LOT NOS.
Remarks
Engineer Reg. No. Date
Signature
FINAL GRADING CERTIFICATION
;C) I certify to the satisfactory completion of grading in accordance with the approved plans.
All required drainage devices have been installed; slope planting established ana irrigation
systems provided (where required); and adequate pr ovisior.:> have beer. made for drainage of
surface waters from each building site. The reccmmendations of the soils engineer and/or
engineering geologist (if such persons were employed) have been incorporated in the work.
LOT NOS.
Remarks
Engineer Reg. `10. Date
Signature)
jEPARTN.ENT USE ONLY: Tract No. T,er?it No. Date
,-port approved by
d
Ti tI e
Date
;;In, 1•;!iVl ^I:I) ! li ",hl I G 1 ; ':} i'! i'I (1i! ('1:}il1 V..
(Tv be filed in duplical.r• aL Lhe loc.sl Building and :�afc:t.y C71'ficc)
Job Address
or Tract l;o. 30578 Locality Diamond Bar
(timer Transamerica Development Permit No.
® NGTT"01 CR/ MNr, CPRT7 71 CATI ONE
® BY SOILS L;IGI NL•'ER
(A) I certify that the earth fills placed on the folloainC lots were installed upon coop--n' and
properly prepared base material :,nd compacted in conplianee with requirements of Balldinj7 C"I
Section 7010. I further certify th::t where the report or reports of an enginecrin;- i;^ ;7oGist
relative to this site, have recoiimended the installation of buttress fills; or other rin;lar
stabilization measures, such earth-,orx construction has been completed in accurdancc wJ th the
approved design.
LOT 1.103. 1 through 188
See report dated 11/5/70 for compaction test data, recommended
allowable soil bearing values and other special reeommendations.
EVANSIVE SOILS (YES) (NO) LOT NOS. See Report
BUTTRESS. -FILLS (YES) (110) LOT NOS. See ReT)ort
Remarks
Engineer Reg. No. 14598 Date 11/5/70
'i Ana hire )
Gerald Gorian
❑ BY SUPERVISING GRADING ENGINEER
(B) I certify to the satisfactory completion of rough grading including: grading to approximate
final elevations; property lines located and staked; cut and fill slopes correctly graded and
located in accordance with the approved design; swales and terraces eradf.d ready for paving;
berms installed; and required drainage slopes provided on the building pads. I further c_-rt_
fy that where report or reports of an engineering geologist and/or soils engineer hPve been
prepared relative to this site, the recommendations contained in such reports nave Leer,
followed in the prosecution of the vorl:.
LOT FOS.
Remarks
Engineer Reg. to. Date
Signature
❑ FIVAL CRFDITIG CERTIFICATION
(C) I certify to the satisfactory completion of grading in accordance with the approved plans.
All required drainage devices have been installed; Slone planting established and irriCation
systems provided (where reouired);and adequate pT'OViSicns have Leer, made for drainage of
surface waters from each building site. The recommendations of the so -.;Is en�.ineer a:,cior
engineering geologist (if such persons were employed) have been incorporated iu, the work.
LOT 110S.
Remarks
Engineer Reg. 140.
S1�neture
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