HomeMy WebLinkAboutTract Map 21760 GeotechReportPreciseGrading(Apr.18,1994)`tit„ Mao
GEOTECHNICAL REPORT
OF PRECISE GRADING, LOTS 63 THROUGH 77
TRACT 21760, TEMECULA
RIVERSIDE COUNTY, CALIFORNIA
10T.0
TERRA NOVA CONSTRUCTION COMPANY
P.O. BOX 612
CORONA DEL MAR, CALIFORNIA 92625
GeoSoils, Inc.
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tAPR
18^199
`tit„ Mao
GEOTECHNICAL REPORT
OF PRECISE GRADING, LOTS 63 THROUGH 77
TRACT 21760, TEMECULA
RIVERSIDE COUNTY, CALIFORNIA
10T.0
TERRA NOVA CONSTRUCTION COMPANY
P.O. BOX 612
CORONA DEL MAR, CALIFORNIA 92625
GeoSoils, Inc.
I
U
•
Geotechnical • Geologic • Environmental
24890 Jefferson Avenue • Murrieta, California 92564 • (909) 677-9651 • FAX(909)677-9301
Mailing Address: P.O. BOX 490 • Murrieta, Califomia 92564
April 13, 1994 W.O. 589 -B -RC
Terra Nova Construction Company
P.O. Box 612
Corona del Mar, California 92625
tAttention: Mr. Jim Rossman
Subject: Geotechnical Report of Precise Grading, Lots 63 through 77, Tract
' 21760, Temecula, Riverside County, California
References: 1) "Geotechnical Evaluation of Hydroconsolidation and Settlement
' Potential, Tract 21760, Temecula, County of Riverside, California," W.O.
589 -A -RC, by GeoSoils, Inc., dated June 7, 1993.
2) "Summary of Existing Graded Lots Potentially Requiring Remedial
Earthwork, Tract 21760, Temecula, County of Riverside, California," W.O.
589 -A -RC, by GeoSoils, Inc., dated March 5, 1993.
In accordance with your request, this final geotechnical report of precise grading is
' provided for Lots 63 through 77, Tract 21760, in Temecula, Riverside County. The site
was previously graded under the observation and testing services of Soil Tech, Inc.
(1990). Precise grading within the subject project, under purview of this report, began
' on March 29, 1994, and was completed on April 1, 1994. Unless superseded by
recommendations presented herein, the recommendations contained in our previous
referenced reports (GeoSoils, Inc., 1993) remain pertinent and applicable and should be
' appropriately implemented.
PREPARATION OF EXISTING GROUND
1. Major vegetation was stripped and cleared from the entire site prior to grading.
' 2
GeoSoils, Inc.
Terra Nova Construction Company W.O. 589 -B -RC
Tract 21760, Temecula April 13, 1994
' Lots 63 through 77 Page 2
' 2. On lots 68, 69, and 70: The pad areas and at least 5 feet beyond in each
direction were overexcavated 36 inches and the bottom was then scarified 12
inches, brought to at least optimum moisture content, then compacted to obtain
' a minimum relative compaction of 90 percent of the laboratory standard ASTM D
1557.
' 3. On lots 63, 64, 65, 66, 67, 71, 72, 73, 74, 75, 76, and 77: The pad area and at
least 5 feet beyond in each direction was scarified to a depth of about 12 inches,
' brought to at least optimum moisture content, then compacted to a minimum
relative compaction of 90 percent of the laboratory standard.
' Fill Placement
Fills consisted of native onsite materials that were placed in thin 6- to 8 -inch lifts, brought
to at least optimum moisture content, then compacted to obtain a minimum relative
compaction of 90 percent of the laboratory standard.
' Field Testing
1. Field density tests were performed using nuclear densometer-methods ASTM D
' 2922 and D 3017. The test results are presented in the enclosed Table I. The
estimated locations of the field density tests are shown on the enclosed Field
Density Test Location Map, Plates 1 and 2.
' 2. Field density tests were taken at periodic intervals and random locations to check
the compactive effort provided by the contractor. Based upon the grading
' operations observed, the test results presented herein are considered
representative of the compacted fill.
' - 3. Visual classification of the soils in the field was the basis for determining which
maximum dry density value to use for a given density test.
4. Compaction tests have been numbered in a continuous sequence for the tract.
Only tests taken on the subject lots are presented herein on Table I.
1
J
1 3
GeoSoils, Inc.
'
Terra Nova Construction Company
Tract 21760, Temecula
W.O. 589 -B -RC
'
Lots 63 through 77
April 13, 1994
Page 3
'
LABORATORY TESTING
'
Maximum Density Testing
The laboratory maximum dry density and optimum moisture content for the major soil
types within this construction
phase were determined in general accordance
test method D 1557. The following table presents the
with ASTM
results:
'
Soil Type Maximum Dry
Optimum Moisture
Density pcf
Content. %
'
E - Sandy Silt, Yellowish 121.5
Brown
13.0
' Expansion Index
Expansive soil conditions have been evaluated for each lot. Representative samples of
' the soils near pad grade were recovered for expansion index testing.
Expansion Index tests were performed
pad grade in general accordance wit
2904(b) of the Uniform Building Code.
Lots
for the typical foundation soil types exposed at
i UBC Standard #29-2 as outlined in Section
These test results are shown below:
Expansion Index UBC Classification
63-70
71-77 27 Low
21 Low
CONCLUSIONS AND RECOMMENDATIONS
Recommendations for foundation design parameters, foundation construction, and utility
trench backfill were presented in our referenced report, dated June 7, 1993. All findings,
conclusions, and recommendations remain pertinent and applicable except as
superseded herein.
REGULATORY COMPLIANCE
Processing of original/existing ground and placement of compacted fills under the
Purview of this report have been completed under the observation and selective testing
services provided by representatives of GeoSoils, Inc. Earthwork was performed in
' general compliance with the Grading Code of the City of Temecula, California.
0
GecSaii.c_ lr" .
' Terra Nova Construction Company W.O. 589 -B -RC
Tract 21760, Temecula April 13, 1994
' Lots 63 through 77 Page 4
Our findings were made in conformance with generally accepted professional
engineering practices, and no further warranty is implied or made. GeoSoils, Inc.
' assumes no responsibility or liability for work, testing, or recommendations performed
or provided by others. This report is subject to review by the controlling authorities for
this project.
' We appreciate this opportunity to be of service. If you have any questions, please call
us at (909) 677-9651.
Respectfully submitted, QR�fESS/pn�
GeoSoils, Inc. y�Q v�PM A. e'
C Aidon
3 No. GE 2U z �l
William A. CiJ, Ir
4 ��
Geotechnical Engineer, P 2 � `�` �N@
F 7F CAOr`
Sherry L. Eaton
Project Manager
' Enclosures: Table I - Field Density Test Summary
Plates 1-2 - Field Density Test Location Map
' Distribution: (6) Addressee
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GeoSoils, Inc.
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' WORK ORDER: 589 -8 -RC
TABLE I TERRA NOVA
'
FIELD DENSITY
TEST SUMMARY
TEST
NO
DATE
LOCATION
ELEV
MOIST
DRY
TEST SOIL
'
Lot No.
OR
DEPTH
CONT
DEN
REL
METH TYPE
%
PCF
COMP
'
170
171
3-29-94
3-29-94
68
1106.1
14.6
109.0
91.2
N E
172
3-29-94
68
67
1106.1
16.1
107.9
90.3
N E
173
3-29-94
67
1106.5
14.4
107.8
90.2
N E
'
174
3-29-94
66
1106.5
1103.7
14.6
108.5
90.8
N E
175
3-29-94
66
16.1
108.1
90.5
N E
176
3-29-94
65
1103.7
16.1
110.0
92.1
N E
177
3-29-94
65
1099.9
15.1
113.1
94.6
N E
'
178
3-29-44
64
1099.9
14.5
113.8
95.2
N E
179
3-29-94
64
1096.0
13.1
117.6
94.8
N D
180
3-29-94
63
1096.0
13.0
118.6
95.6
N D
'
181
3-29-94
63
1091.6
11.8
118.9
92.9
N A
182
3-30-94
68
1091.6
14.7
118.0
92.2
N A
183
3-30-94
68
1109.1
18.8
108.3
90.6
N E
'
184 *
3-30-94
69
1109.1
1109.2
19.0
107.6
89,9
N E
184 A
3-31-94
69
17.6
100.2
83.8
N E
185 *
3-30-94
69
1109.2
15.7
110.1
92.1
N E
185 A
3-31-94
69
1109.2
23.8
85.1
71.2
N E
'
186 *
3-30-94
69
1109.2
17.8
108.9
91.1
N E
186 A
3-31-94
69
1109.2
22.6
90.1
75.4
N E
187
3-30-94
7.1
1109.2
16.4
109.0
91.2
N E
'
188
3-30-94
71
1113.5
16.3
108.0
90.4
N E
189
3-30-94
72
1113.5
16.6
108.1
90.5
N E
190
3-30-94
72
1112.3
14.9
112.9
94.5
N E
'
191
3-30-94
73
1112.3
1109.1
14.2
17.1
110.8
92.7
N E
192
3-30-94
73
109.4
91.5
N E
193 *
3-30-94
74
1109.1
17.3
108.2
90,5
N E
193 A
3-31-94
74
1106.2
22.8
102.7
85.9
N E
194 *
3-30-94
74
1106.2
16.6
109.1
91.3
N E
194 A
3-31-94
74
1106.2
24.2
102.6
85.9
N E
'
195
196
3-31-94
3-31-94
75
1106.2
1097.5
16.4
14.6
110.8
111.5
92.7
93.3
N E
75
N E
197
3-31-94
76
1097.5
14.7
111.4
93.2
N E
198
3-31-94
76
1094,7
14.4
107.7
90.1
N E
'
199
3-31-94
77
1094.7
14.6
108.7
91.0
N E
200
3-31-94
77
1092.1
15,0
109.5
91,6
N
EE
201
3-31-94
70
1092.1
14.5
110.9
92.8
N
202
3-31-94
70
1110.6
14.6
112.3
94.0
N E
'
203
4-1-94
70
111 0.6
14.6
110.2
92,2
N E
204
4-1-94
70
1113.6
15.4
108.7
91.0
N E
'
205
206
4-1-94
4-1-94
69
1113.6
1112.2
15.9
15.2
110.0
110.7
92.1
92.6
N
69
N E
1112.2
14.6
110.8
92.7
N E
'
LEGEND: * -
Failing Test
A -
Retest
A
....... ....... ....... ........
Joe
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Limits of compacted fill under purview of this report
o�A
Approximate location of field density test
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