HomeMy WebLinkAboutTract Map 9833-3 Lot 27 Rough Grading
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JAN 2 2 1999
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REPORT OF OBSERVATION AND FIElD DENSITY TESTING
ROUGH AND FINE GRADING
SINGLE FAMILY. GARAGE PADS
LOT 27, TRACT 9833-3
CA' , 1= DE VElARDO
TEMECUlA, RIVERSIDE COUNTY, CAUFORNIA
PROJECT NO. 9910+01
JANUARY 7, 1999
Prepared For:
Temecula Engineering Consultants
43180 Bus/nesa Park Drive, Suite 103
Temecula, California 92590
Earth Technics P.O. Box 891989, Temecula, California 92589 (909) 699-5451
January 7, 1999 project No. 99104-01
TEC
43180 Business Park Drive, suite 103
Temecula, California 92590
SUBJECT: REPORT OF OBSERVATION AND FIELD DENSITY TESTING
ROUGH AND FINE GRADING
Residential , Garaq. Pad,
Lot 27, Tract 9833-3, Calle de Velardo
Temecula, Riverside county, California
INTRODUCTION
This report presents the results of our observation and testing
performed during construction and grading for the residential,
and garage pads and access driveway during rough and fine grading
of the subject lot.
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The pad was constructed on the east side of Calle de Velardo, a
paved improved road in the Temecula area of Riverside County. 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 20-scale Grading Plans were prepared by TEC Inc.,
Temecula, dated May 1988, and were used to plot our data and
guide the grading, along with field staking.
proiect Descriotion
The proposed development consisted cutting the northwest side of
the property placing fill for the pad and driveway to the east
and south. A long access driveway was graded. In general, the
grading required cuts up to 3 feet on the west and fills to 3
feet on the south and east. Cut and fill slopes were constructed
at finished inclinations of 2:1 (horizontal to vertical) or
flatter. The house and garage pad was constructed in transition
from fill to natural and was over excavated to a minimum depth of
30 inches from finished grades. The cut slopes and daylight cuts
consist of dense sedimentary bedrock of the Pauba Formation that
had no adversely oriented bedding to develop stability problems,
and are stable as constructed. The fill slopes are stable as
constructed, based on high strength values. The granular nature
of the fill slopes could be easily eroded and should be planted
as soon as possible.
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INDEX MAP
OF
LOT 27, TRACT 9833-3
CALLE DE VELARDO, SANTIAGO ESTATES, TEMECULA AREA
RIVERSIDE COUNTY, CALIF
SOURCE: U.S.G.S. 7~ MIN. QUAD. PECHANGA 1968 (PR 1988)
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99104-01
Page 3
puroose of Gradina
The purpose of the grading was to prepare the site for the
proposed construction of the one and two-story single family
residence, attached garage, and driveway access.
GRADING PROCEDURES
Gradina Procedures
The site was stripped of the light growth and grasses, in the
areas to receive fill and the pad area, and removed off-site. The
areas to receive fill were then overexcavated 1 1/2 - 2 feet or
until the dense underlying sedimentary bedrock was encountered.
Fill keys were necessary as shown on Plate 1. The fill materials
were brought to near optimum moisture utilizing a 5000-gallon
water truck when necessary, and compacted with a Caterpillar D6M
bulldozer.
The grading contractor was Blackmore Construction Inc., 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.
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99104-01
Page 4
ExDansion 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 21 which is very low expansion. The foundation
should have a minimum of one No. 4 bar top and bottom as
reinforcement.
Sulfate Testina
A finished grade sample was obtained and tested for water
soluable sulfate. The results were 185ppm indicating normal Type
II concrete may be used for foundations and slabs.
SUMMARY
Our description of grading and backfill operations, as well as
observations and testing services, were limited to those grading
operations performed between December 29 and 30, 1998. The
conclusions and recommendations contained herein have been based
upon our observation and testing as noted. It is our opinion,
that the work preformed in the areas denoted has generally been
accomplished in accordance with the recommendations of the
referenced report, U.B.C. Chapter 33, the Riverside County
Grading Code, as amended by Ordinance No. 457 specifications, and
the requirements of the regulating agencies and is accetable for
its intended purpose.
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.
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Attachments:
Index Map - Page 2
Plate 1 (20-scale) - Grading Plan
Table I - Results of Compaction Tests
Table II - Summary of Maximum Density Testing
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TABLE J:
RESULTS OF COMPACTION TESTS
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JOB NO.: 99104~01 NAME: TFr DATE: 1/7/99
MOISTURE UNIT DRY RELATIVE SOIL
TEST NO. DATE DEPTH CONl~NT DEN~gY COMPA,~TlON TYPE
(110 (PC (110 . !,
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1 12/29/98 1205 10.2 120.6 92.3 A 1st Lift key/fiI
2 12/30 1.207 P~d ..
9.8 ,118.7 90.8 II .finish/over
3 'II 1205 8.7 121.2 92.7 II DrilLeway fini sh
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TABLE ]I
. LABORATORY TEST RESULTS,
JOB NO,: QQln4_nl NAME: TEC DATE: 1/7/99
SOIL TYPE CLASSIFICATION MAXIMUM OPTIMUM
DENSITY (PCF) MOISTURE 1%)
A. On-site yellowish 'brown sil ty sand \1i th
minor clay 130.7 10.8
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