HomeMy WebLinkAboutMass Grading Compaction Test
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SOILS. MAW<IALS AND fNVIKONMFNTAI rNCIN~~RIN(;'
897 VIA LATA. SUITE N . COLTClN. CA n"IL'l . ('10')) 37().04i4 . (~J()')1370-()4al . r.\X (909,13iO-,1156
September 4, 1997
Project No.97055-FC1,
Regency Homes, Inc.
4532 Sharon Drive
La Palma, California 90623
Attention:
Mr. Suresh Patel
subject:
Report of Mass Grading Compaction Test
Proposed 46-lot Single Family Tract Development
Tentative Tract 28309,
Nicholas Road, Temecula, California
Reference:
Grading Plan Tract 28309
Prepared by Robert Bein. William Frost & Associates
Gentlemen:
This is to present the results of our grading observation and compaction testing conducted during the
placement and compaction of the fill placed for the site of the proposed 46-lot single family tract
development, tentative tract 28309 . Temecula, California referenced above, Dwellings planned are
expected one and/or two-story conventional wood frame and stucco construction with concrete slab-on-
grade. Grading and testing were performed in accordance with the recommendations provided in the
prevailing soils investigation report prepared by this firm and as per the project specifications presented
in the gn~ding plan prepared by Robert Bein. William Frost & Associates, Professional Engineers, Planners
& Surveyors.
The results of fill compaction tests performed are shown on Table I. The results of the laboratory
determined Maximum Dry Density-Optimum Moisture Content of the various soils type used during grading
are shown on Table II. Approximate locations of fill compaction testing are shown on Plate A.
Grading Observations and Compaction Testing:
The opinions presented are based on our during grading fill compaction testing and observations of the
grading procedures used. and represent our opinion as to the contractor's compliance with the project
plans and specifications, and did not include any superintending, supervision or direction of the actual work
performed by the contractor, or his workmen at the site,
.
In general, following site clearance, surficial soils were subexcavated to expose competent natural
subgrades on which to place new structural fill to support concrete slab-an-grade and foundations.
For uniform structural bearing, combined depths of fills and subexcavations were maintained to a minimum
30-inch below planned finiShed grades. Within areas of cut, following cuts, additional subexcavations were
made to maintain a fill blanket of 1,5 feet below footings. LOCal and import soils were used as fill blanket
compacted to a minimum 90% relative Compaction. Where applicable, within areas of transition, cut
portions were subexcavated as above and backfilled to maintain the compacted blanket fill as described.
Soils used are considered 'non-expansive' in contact with water.
During grading. line and grade for individual planned padS were supplied by the project civil engineers.
Soils Southwest, Inc. assumes no responsibility pertaining to the correctness of the building p!ld IO('-"lions
and/or of tr,e finished grade elevaliolls established.
[stablished 19B4
\
, Regency Homesrrr. 28309.tmecula
.
97055-FC1
In general, mass grading and compaction testing of the fill placed within the residential pads and beyond
were performed as described below:
1. Vegetation, surface trash and other miscellaneous debris were cleared off the areas to be
graded and such were disposed off prior to actual grading.
2. Fallowing site clearance, the planned areas were subexcavated to sufficient depths so as
to maintain a tota/2.5 feet deep compacted blanket below finished grades, including within
shallow fill areas, where required.
3. The exposed surface to refeive fills was scarified, moisture conditioned and compacted
to at least 90 percent of the applicable laboratory Maximum Dry Density as determined
per ASTM 01557-91 test method.
4. Approved on site stOCkpiled soils were placed in thin lifts by using scraper and frontend
loader. Each layer was compacted to at least the specified density before the next layer
was added,
5. Compaction of the fill was obtained by adding moisture supplied by water truck. mixing
and compacting with construction equipment.
6. Placement of compacted fill was continued to the approximate limits and grades as
determined by the project surveyor and/or by the grading contractor.
7. Where field density tests indicated a failure in aChieving the minimum 90% compaction,
additional compactive efforts were applied to the subject areas and such were tested until
the required minimum relative density was attained,
Conclusion and Recommendations
Based on the observation of the construction sequences used during grading. it is our opinion that the
compacted fill on pads has been placed in accordance with the requirements set forth in the preliminary
soils report, current use, the project plans, specifications and the local governing agency, The compacted
fills discussed is intended to support concrete slab-on-grade and foundations. General recommendations
presented in the preliminary soils report should be considered applicable on the compacted fill placed.
It is suggested that future earthwork, jf any, requiring additional fill placements beyond the limits and above
the current finished giades, should be performed under direct inspection of a soils engineer.
It is recommended that all load bearing footings shOUld be located only within the areas of the compacted
fill placed. Footing excavations shOUld be approved by Soils Southwest, Inc, and/or by the locai
government agency having jurisdiction, to ensure that suitable soils have been penetrated and that
excavations are free of loose or disturbed soils. To minimize differential settlements, foundations straddling
over cut-fill transition, shall be avoided.
At time of covering, subgrades for paving and fioor slabs should be compacted to specified density and
such should be firm, unyielding and protected by vapor barrier where (equired.
Considering non-expansive fill material, no additional footing embedment and/or reinforcements are
expected other than those as specified in the preliminary aoils report.
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September 4, 1997
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97055-FC1
Regency Homes/Tr. 28309, Temecula
To prevent future cracking of concrete slabs-on-grade. it Is recommended that no dumping of loose and/or
excess spoils derived from footing and utility trench excavations be allowed on the individual subgrades
prepared to receive concrete slabs-on-grade, Soils Southwest. Inc. will assume no responsibility, what-so-
ever, in event concrete is poured without proper inspection of slab-subgrades and foundation trenches,
Foundation trenches should be free of loose dirt and compacted pnor to concrete pour. It is recommended
that such should be approved by soils engineer and be corrected, if necessary, prior to further
construction.
To prevent foundation distress due to hydroconsolidation. use of planters adjacent to footings should be
avoided. Soils Southwest, Inc, assumes no.responSibility in event foundations are distressed during life-
time use of the property due to foundation soil saturation from planters,
Ciosure
Compacted fills placed are in accordance with the prevailing state-of the-art in the field of soil mechanics
and foundation engineering and as recommended in the prevailing soils report. Fill placed are intended
to support concrete slabs-on-grade and load bearing foundations. Soils used during grading are considered
silty, gravelly sand with little or no clay.
To minimize potential differential settlements to footings, it is suggested that following excavations,
excavated trenches shall be verified to ensure presence of only compacted fill underneath foundation
bottoms. As recommended In preliminary soils report, considering gravelly site soils, use of planters
adjacent to footings shall be restricted to minimize potential foundation settlements due to
hydroconsolidation,
To prev~nt moisture migration to moisture sensitive areas. it is recommended that vapor barrier, in form
of Visqueen or other commercially available similar products, should be used with proper protective
coverings prior to concrete pour.
Adequate construction joints are suggested in between garage slabs and driveways as required by the
local public agency,
The recommendations and opinions provided are based on our observation of grading conducted during
fill placement We offer no other warranty other than striving to perform in a manner as generally used
during site preparation and grading for similar mass grading projects within the County of San Bernardino.
Thank you for the opportunity to be of service on this project, Should you have any questions regarding
this report, please call the undersigned at your convenience.
(
~&
Respectfully submitted,
Soils Southwest, Inc.
Moloy Gup a, RCE 31708
Marco Cantu
Senior Field Personnel
dist/5.addressee
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September 4, 1997
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Regency Homes/if. 28309. Temecula 970SS-FC 1
Table I
Field Density Test Results
Test Test Test Dry Moisture Soil Relative
No. Location Depth Density Content Type Compaction.
(Pad#) Below F,G.
(ft.) (pcf) (%) (%)
Test Date 5-19-97
1 36 bottom 4.0 113.4 11.6 A 91(N)
2 38 . 40 114.5 10,9 A 92(N)
3 40 " 3.0 11ls 12.3 A 91(N)
4 42 " 3,0 114,6 12,0 A 92(N)
5 44 " 3.0 116,1 11.7 A 94(N)
6 46 " 3.5 114.5 12.4 A 92(N)
7 1 " 2,5 114.0 13.1 A 92(N)
8 3 " 25 1150 11,5 A 93(N)
5-23-97
9 5 " 55 114.5 11.4 A 92(N)
10 7 " 55 116.4 10.3 A 94(N)
11 9 50 115,2 12.7 A 93(N)
12 11 " 5,0 117.6 11.0 A 95(N)
13 13 " 4.5 1162 10.7 A 94(N)
14 15 " 4.0 1161 11.5 A 94(N)
15 16 " 4.5 115.6 12,3 A 93(N)
16 18 " 4.5 117.5 11.2 A 94(N)
17 20 .. 4.0 114,8 10.3 A 93(N)
18 22 .. 3.0 114.1 11.6 A 92(N)
19 23 .. 3.0 113.3 10.7 A 91(N)
20 24 " 3.0 114.3 12.3 A 92(N)
21 26 " 3.0 1149 13.7 A 93(N)
22 28 " 2.5 1150 12.6 A 93(N)
23 30 .. 2.5 116,8 11.9 A 94(N)
24 32 2.5 116.2 12,7 A 94(N)
5-30-97
25 33 2.0 118.1 10,6 B 94(N)
26 32 2.0 1202 9.3 B 95(N)
27 31 1,S 1192 8.8 B 95(N)
28 30 1.5 118.2 11.4 B 94(N)
29 29 1.5 119.2 11.0 B 95(N)
30 28 2.0 120.4 10.9 B 96(N)
31 27 20 114.2 12.6 B 91(N)
32 26 2,0 114.9 11.3 B 91(N)
6-2-97
33 46 3.0 113.4 12.3 C 91(N)
34 45 3.0 113.9 13.4 C 91(N)
35 44 3.0 115.1 11.7 C 92(N)
36 43 3.0 113.9 12.0 C 91(N)
37 42 3.0 113.2 13.5 C 90(N)
38 41 3.0 114.7 13.0 C 92(N) '\
Page 4 September 4, 1997 SSW
Regency HomeslTr. 28309, tecula . 97055-Fe 1
Table I (continued)
Field Density Test Results
Test Test Test Dry Moisture Soil Relative
No. Location Depth Density Content Type Compaction.
(Pad#) Below FG,
(ft.) (pct) (%) (%)
Test Date 6-3-97
39 40 3.0 115.5 12.7 C 92(N)
40 39 30 114.4 13.4 C 91(N)
41 38 3.0 11433 123 C 93(N)
42 37 3.0 115.8 11.9 C 93(N)
43 36 30 114.6 14.6 C 92(N)
44 35 2.5 114.8 13.8 C 91(N)
45 34 2.5 114.4 13,2 C 91(N)
46 46 1.5 116.8 125 C 93(N)
47 45 1.5 117.1 12.7 C 94(N)
48 44 1.5 115.7 13,0 C 93(N)
6-4-97
49 43 15 118.3 11.3 C 95(N)
50 42 1.5 114.5 128 C 92(N)
51 41 1.5 115.3 13.4 C 92(N)
52 40 15 118.4 11,0 C 95(N)
6-16-97
53 39 1.5 115.7 12.9 C 93(N)
54 38 1,5 1169 12,7 C 93(N)
55 37 1,5 116.5 13.6 C 93(N)
56 36 1,5 115,8 12.5 C 93(N)
57 35 1.5 116.8 12.7 C 93(N)
58 34 1,5 117.1 11.4 C 94(N)
6-19-97
59 42 0.0 112.9 8.9 C 90(N)
60 40 0.0 114.2 7.4 C 91(N)
61 39 0.0 113.5 9.3 C 91(N)
62 38 0,0 116.4 10.4 C 93(N)
63 37 0.0 115.4 10.8 C 92(N)
64 36 0.0 113,4 8.7 C 91(N)
66 35 0.0 114.4 9.5 C 91(N)
66 34 00 112.8 9.3 C 90(N)
6-24-97
67 33 1,0 118.7 10.6 B 94(N)
68 32 1.0 120.4 9.7 B 95(N)
69 31 1.0 118.5 11.3 B 94(N)
70 30 1.0 117.7 10.2 B 93(N)
71 29 1,0 117.3 9.9 B 93(N)
72 28 1.0 118.1 10.7 B 94(N)
'5
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Regency HomeslTr. 28309. Temecula 97055-FCl
Table I (continued)
Field Density Test Results
. Test Test Test Dry Moisture Soil Relative
No. Location Depth Density Content Type Compaction.
(Pad #) Below F.G.
(ft.) (pcf) (%) (%)
Test Date: 6-25-97
73 1 2.0 1134 11.6 A 91(N)
74 2 2,0 114.5 10.9 A 92(N)
75 3 2.0 113.5 123 A 91(N)
76 4 30 114.6 12,0 A 92(N)
77 5 4.0 116.1 11.7 A 94(N)
78 6 4.0 114.5 12.4 A 92(N)
79 7 4.0 114.0 13.1 A 92(N)
80 8 4.0 115,0 11.5 A 93(N)
81 9 4.0 114.5 11.4 A 91(N)
82 10 4.0 116.4 10.3 A 93(N)
83 11 4.0 115.2 12.7 A 91(N)
84 12 3.5 117,6 11,0 A 90(N)
85 13 3.5 116.2 10,7 A 95(N)
86 14 3,5 116.1 11.5 A 95(N)
87 15 3.5 1156 12.3 A 96(N)
88 16 3,5 1175 11.2 A 97(N)
6-26-97
89 17 3.5 1148 10.3 A 93(N)
90 18 3.5 114.1 11,6 A 92(N)
91 19 3.0 113.3 10.7 A 91(N)
92 20 2,5 114.3 12,3 A 92(N)
93 21 2.5 114.9 13,7 A 93(N)
94 21 2.5 115.0 12.6 A 93(N)
95 23 2,5 116,8 11.9 A 94(N)
96 24 2.5 116.2 127 A 94(N)
97 24 1.5 113.4 12.3 C 91(N)
98 23 1,5 113,9 13.4 C 91(N)
99 22 15 115.1 11.7 C 92(N)
100 21 1.5 113,9 12.0 C 91(N)
101 20 1.5 113.2 13,5 C 90(N)
102 19 1.5 114.7 13.0 C 92(N)
103 18 2.0 115.5 12.7 C 92(N)
104 17 2,0 1144 13.4 C 91(N)
6-27 -97
105 16 2.0 116.3 12.3 C 93(N)
106 15 2.0 122.7 11.9 C 93(N)
107 14 20 120.6 14,6 C 92(N)
Page 6
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September 4, 1997
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Regency Homes/Tr, 28309. .eCUla . 9705S-Fel
Table I (continued)
Field Density Test Results
Test Test Test Dry Moisture Soil Relative
No, Location Depth Density Content Type Compaction,
(Pad#) Below F.G,
(ft.) (pet) (%) (%)
Test Date: 6-27-97
108 13 2.0 114.8 13.8 C 93(N)
109 12 2.0 114.4 13.2 C 93(N)
110 11 20 116.8 12,5 C 92(N)
111 10 2.0 117.1 127 C 91(N)
112 9 2,0 115.7 130 C 91(N)
6-27-97
113 8 2.0 1183 11.3 C 95(N)
114 7 2.0 1145 12,8 C 92(N)
115 6 20 115.3 13.4 C 92(N)
116 5 2.0 118.4 11.0 C 95(N)
117 4 1.5 115,7 12.9 C 93(N)
118 3 1.0 116,9 12.7 C 93(N)
119 2 1.0 1165 13.6 C 93(N)
120 1 1,0 115.8 125 C 93(N)
7 -S-97
121 7 1.0 120,1 9.5 0 93(S)
122 6 1.0 117.0 9,0 0 91(S)
123 5 10 119.5 8,0 D 93(S)
124 4 10 116.9 90 D 91(S)
125 3 1.0 1162 12.0 D 90(S)
7-21-97
126 33 0.0 119,3 7,3 C 95(N)
127 33 0.0 119,3 6.9 C 95(N)
128 32 0.0 119.9 5.9 C 96(N)
129 32 00 120.9 7.0 C 97(N)
130 31 0.0 118.9 6.2 C 95(N)
131 31 00 118.5 6.0 C 95(N)
132 30 0.0 119.2 7.1 C 95(N)
133 30 00 118,7 65 C 95(N)
134 29 0,0 119,7 58 C 96(N)
135 29 00 120,1 6.3 C 96(N)
136 28 0.0 119,1 5.7 C 95(N)
137 28 0,0 120.1 6.0 C 96(N)
138 27 0.0 119.0 72 C 95(N)
139 27 00 118.3 6,0 C 95(N)
140 26 0.0 119.9 5,3 C 96(N)
Page 7
September 4, 1997
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. Regency Homes/Tr. 28309, '-ecula . 97055.FC1
Table I (continued)
Field Density Test Results
Test Test Test Dry Moisture Soil Relative
No. Location Depth Density Content Type Compaction,
(Pad #) Below F.G.
(ft.) (pel) (%) (%)
Test Date: 7-21.97
141 26 0.0 119.0 67 C 95(N)
142 25 0.0 1203 52 C 96(N)
143 25 0.0 120.4 5.7 C 96(N}
.
7 -22-97
144 24 0.0 120.1 9.5 D 93(N)
145 22 0,0 117.0 9.0 D 91(N)
146 21 0.0 1195 8,0 D 93(N)
147 15 0,0 116.9 9.0 D 91(N)
148 14 0,0 116,2 12,1 D 90(N)
149 13 0.0 121.6 10,2 D 94(N)
150 12 0.0 119,7 11.0 0 93(N}
151 11 0,0 122,6 10.3 0 95(N}
152 10 0.0 118.4 10.2 D 92(N}
153 9 0,0 119.1 11.0 0 92(N)
154 8 0,0 121.2 9.1 D 94(N}
7-29-97
155 1 0.0 118.4 10,0 D 92(S}
156 2 0.0 119,1 11,0 0 92(S)
157 3 0.0 121.2 90. D 94(S}
158 4 0.0 122,7 90 D 95(S)
159 5 0,0 120.6 10,0 0 93(S}
160 6 00 122.6 8.0 0 95(S)
161 7 0.0 121.7 90 D 94(8)
162 8 0,0 1219 10.0 D 94(S)
163 9 0.0 120.7 100 0 94(S}
164 10 0,0 121.7 90 0 94(8)
165 11 00 120.4 11.0 0 93(8)
166 12 0,0 121.4 10.0 D 94(S)
167 13 0.0 123.6 9.0 0 96(S)
168 14 0.0 121.6 10.0 D 94(S)
169 15 0.0 119.7 11.0 D 93(S)
170 16 0.0 122,6 10,0 D 95(S}
171 17 0.0 123.4 9.0 D 96(S)
172 18 00 120.6 10,0 0 93(S)
173 19 0.0 123.6 10.0 0 96(N)
174 20 0.0 124,5 10,0 0 96(N)
Test Method used: ASTM 02992.78 (N)-(Nuciear Density Gauge)
(S)-(Denotes Sand Cone Method)
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September 4, 1997
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Regency Homes/Tr. 28309, eeCUla
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970S5-Fe 1
Soil
Type
Table II
Laboratory Maximum Ory Density
Soil
Description
Optimum
Moisture
(%)
Maximum Dry
Density
(pet)
A Silty. sand, slightly gravelly 11.3 124
light brown, with some rocks
B Import-fine sand. silty, brown 107 126
C Import-sand, gravelly. D.G. origin. 12.0 125
light brown
D Import soil- sand, siity, It.brn. 10,0 129
Test Method used: ASTM 01557-91
Page 9
September 4, 1997
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