HomeMy WebLinkAboutTract Map 3883 Lot 324 Field Density Testing
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RECEIVED
MAY 2 3 2001
CITY OF TEMECULA
ENGINEERING DEPARTMENT
REPORT OF OBSERVATION AND RELD DENSITY TESTING
RNE GRADING
SINGLE FAMILY PAD
LOT 324, TRACT 3883
CALLE RESTA, APN 919-210-003
TEMECULA, RIVERSIDE COUNTY, CAUFORNIA
,
PROJECT NO. 21186-01
MAY 22, 2001
Prepared For:
Mr. &: Mrs. Gregory Bringhurst
29846 V'1a Puesla Del Sol
Temecula, California 92591
\
Earth Technics P.O. Box 891989, Temecula, California 92589 (909) 699-5451 FAX (909) 767-1193
May 22, 2001
Project No. 21186-01
Mr. Mrs. Gregory Bringhurst
229846 Via.Puesta Del Sol
Temecula, California 92591
SUBJECT: REPORT OF OBSERVATION AND FIELD DENSITY TESTING
ROUGH AND FINE GRADING
Lot 324, Tract 3883, Calle Fiesta
A.P.N. 919-210-003
Temecula, California
Reference:
"preliminary Geotechnical Investigation, single-
,Lot Residential Development, Lot 324, Tract 3883,
.Calle Fiesta, Temecula, Riverside County,
.California", Report Dated April 3, 2001, by Earth
Technics, Proj. No. 21152-01
Gentlemen:
INTRODUCTION
This report presents the results of our observation and testing
performed during construction and fine grading of the main
residential and attached garage pad, short access driveway from
Calle Fiesta, and the long access driveway to the rear or west
side of the lot.
The property is located approximately 375 feet southwest of the
intersection of via Norte and Calle Fiesta both improved paved
roads in the Temecula area of Riverside County. Grading consisted
of cutting on the east and north side of the pad and placing fill
on the west and south. Maximum cuts and fills were 16 and 26 feet
respectfully at finished inclinations of 2:1 (horizontal to
vertical) or flatter. Maximum overexcavation of alluvium was 4.3
feet from original ground in the lower key area. The results of
our Field Density Tests obtained during grading are tabulated in
Table I, Results of Compaction Tests. The approximate locations
of the tests are shown on the Plot Plan, Plate 1.
The 40-scale Grading Plan, prepared by Elliott Uhrich, Temecula,
dated April 2001, was used to direct the grading along with field
staking.
Pro;ect Description
The proposed development consisted of construction of a house and
attached garage pad. A short access driveway from Calle Fiesta
and long access road to the lower western portions of the
property was also constructed. The pad and lower access driveway
consisted of fills and cuts to 26 feet was constructed to provide
access to western portion of the lot.
2
INDEX MAP
o
I .
2000
4000
N
SCALE
, feet
INDEX MAP
OF
LOT 324, TRACT 3883
APN 919-210-003
CALLE FIESTA, TEMECULA
CALIFORNIA
.3
SQURCE: U.S.G.S. 7'>. MIN QUAD. BACHELOR MTN. 1953 (PR 1973)
21186-01
Page 3
Purpose of Gradina
The purpose of .the grading was to prepare the site for the
proposed construction of the one and two-story single family main
residence with attached garage. A short access driveway access
was provided to the house from Calle Fiesta, and to natural areas
on the western side of the lot.
GRADING PROCEDURES
Gradina Procedures
The site had heavy weeds and grasses, and clearing and grubbing
was performed prior to the start of grading. The cleared material
was removed off-site for disposal. The areas to receive fill were
over excavated to a maximum depth of 4.3 feet until the underlying
dense sedimentary bedrock was encountered.
Keys for the fills were required as shown on Plate 1.
Water was supplied with a 4000-gallon water truck, and the soil
was compacted with a combination of caterpillar D6D bulldozer,
and 966C rubber-tired front-end loader.
The grading contractor was Full House Construction of Temecula.
TESTING
Field Densitv Testina
Field density testing was performed in accordance with ASTM
D1556-64 (Sand Cone Method). The elevations and the results of
the field density tests are presented in Table I of this report.
The approximate location of the tests are shown on the Grading
Plan, Plate, 1.
Maximum Densitv Determinations
Maximum density/optimum moisture determinations were made from
representative samples of on-site soils used in the fill
operations. The tests were performed in accordance with ASTM D
1557 which consist of compacting 5 equal layers of soil in a 1/30
cubic foot volume mold with 25 blows of a 10 pound hammer falling
18 inches. The results of the Maximum density/optimum
,determination are presented herein as Table II, Laboratory Test
. Results.
: Exnansion/Soluble Sulfate Testina
.A finished grade sample was obtained and tested for expansion
utilizing the U.B.C. 29-2 method. The test yielded an expansion
index (E.I.) of 10 which is very low expansion.
4
21186-01
Page 4
The finished grade soils had a soluble sulfate content of 51 ppm.
Normal Type II ,cement with 2500psi may be used in construction.
Settlement
Based on the grading performed, the compaction, and soil strength
values the total settlement will be 1 inch with less than 3/4
inch of differential settlement between footings of similar size,
construction and loads over a horizontal distance of 50 feet.
SUMMARY
Our description of grading and backfill operations, as well as
observations and testing services, were limited to those grading
operations performed between May 14 and May 22, 2001. The
conclusions and recommendations contained herein have been based
upon our observation and testing as noted. To the best of our
knowledge, the ,work preformed in the areas of our
responsibilities is in accordance with the recommendations of the
referenced report, city of Temecula Grading Ordinance, and
applicable provisions of Appendix Chapter 33 of the UBC. The pad
is acceptable for its intended purpose.
The cut slopes are constructed in sedimentary bedrock and are
stable as constructed.
No conclusions or warranties are made for areas not tested or
observed. This report should be considered subject to review by
the controlling authorities.
This opportunity to be of service is sincerely appreciated. If
you have any questions, please call.
s
21186-01
Page 5
Respectfully Submitted,
Larry J. Fast,
Registration E,
Services
WLS/LJF:ss
Attachments:
Index Map (2000-scale) - Page 2
Plate 1 - Test Location Plan (40-scale)
,Table I - Results of Compaction Tests
Table II - Summary of Maximum Density Testing
Distribution: Addressee (6)
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TABLE I
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RESULTS OF COMPACTION TESTS
JOB NO. 21186-01
NA~:BRINGHITJRST
DATE: 5/23/01
TEST DATE DEPTH MOISTURE UNIT DRY RELATIVE SOIL DESCRIPTION
NO CONTENT DENSITY COMPACTION TYPE
(%) (pCF) (%)
:
1 5/14/01 1243 9.5 118.1 90.0 A KEY 1 ST LIFT
2 5/14/01 1245 8.4 118.2 90.1 A FILL
3 5/14/01 1248 7.8 120.5 91.8 A FILL
4 5/15/01 1251 8.1 117.7 91.6 B FILL
5 5/15/01 1254 8.7 119.4 91.0 B FILL
6 5/15/01 1257 9.6 128.6 98.0 A FILL
7 5/16/01 1260 9.5 128.3 97.8 A FILL
8 5/16/01 1262 9.9 130.0 99.1 A FILL
9 5/18/01 1264 7.8 121.5 94.5 B FILL
10 5/18/01 1267 6.4 109.8 85.4 B FILL
lOB 5/19/01 1267 8.1 117.2 91.2 B FILL
11 5/19/01 1270 8.9 121.9 94.9 B FILL
12 5/19/01 1265.5 8.5 123.5 96.1 B OVER FINISH
'13 5/22/01 1271.3 9.8 125.2 97.4 B GARAGE OVER
FINISH
See plan for test locations.
SC-Sand Cone ASTM Dl556-64
""Test Failed. See Retest.
DC-Drive Cylinder ASTM 02937-71
N-Nuclear ASTM 3017-78
8
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TABLE II
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LABORATORY TEST RESULTS
JOB NO. 21186-01
NAME: BRINGHURST
DATE: 5/23/01
SOIL TYPE CLASSIFICATION MAXIMUM OPTIMUM
DENSITY (PFC) MOISTURE (%)
,
A ON-SITE LIGHT BROWN SILTY SAND 131.2 11.1
WITH 5% GRAVEL
B ON-SITE/IMPORT PAUBA SILTY SAND 128.5 10.7
WITH MINOR GRAVEL TRACE OF
CLAY
4