HomeMy WebLinkAboutCT 82-08; THE CREST AT CALAVERA HILLS; COMPACTION TESTS; 1983-08-05•
•
•
•
•
•
•
•
•
•
•
REPORT OF FIELD OBSERVATION
AND RELATIVE COMPACTION TESTS
TRACT 82-8,
THE CREST AT CALAVERA HILLS, VILLAGE G
CARLSBAD, CALIFORNIA
PREPARED FOR:
Pacific Scene, Inc.
3900 Harney Street
San Diego, California 92110
PREPARED BY:
Southern California Soil & Testing, Inc.
Post Office Box 20627
6280 Riverdale Street
San Diego, California 92120
•
•
•
•
•
•
•
•
..
•
SOUTHERN CALIFORNIA SOIL AND TESTING, INC.
6280 RIVERDALE ST. SAN DIEGO, CALIF". 92120 • TELE 280-4321 • P.O. 80X 20627 SAN DIEGO, CALIF". 92120
7 4 - 8 :3 1 VEL lEW A Y PAL M DES E R T, CAL IF. 9 2 2 6 0 • TEL E :3 4 6 - 1 O.? 8
678 ENTERPRISE ST. ESCONDIDO, CALIF". 92025· TELE 74'6-4544
August 5, 1983
Pacific Scene, Inc.
3900 Harney Street
SCS&T 14143
Report No. 5
San Diego, California 92110
SUBJECT:
REFERENCES:
Gentlemen:
Report of Field Observation and Relative Compaction Tests,
Tract 82-8, The Crest at Calavera .Hills, Village G, Carlsbad,
California.
1)
2)
Earthpackage Investigation, Lake Cala-vera Hills, Vill~
age G, Prepared by Southern Cal ifo~nia Soil & Testi.ng,
Inc., dated March 24, 1983.
Updated Geotechnical Investigation, Lake Calavera
Hills, Village G, Prepared by Southern California'Soil
& Testing, Inc., dated April 26, 1983.
In accordance with your request, this report has been prepared to present
the results of the field observations and relative compaction tests per-
formed at the subject site by Southern California Soil & Testin'g, Inc.
These services were performed between June 2 and July 26,'198~ •
SOUTHERN CALIFORNIA SOIL AND TESTING, INC.
•
•
•
•
•
•
•
•
•
•
SCS&T 14143 August 5, 1983 Page 2
SITE DESCRIPTION
The subject site is an irregular shaped parcel of land that is situated in
the Calavera Hills area of Carlsbad, Cal ifornia. Topographica'lly, this
site is dominated by two relatively large drainage swales which run in a
general southwesterly di recti on. El evati ons were noted to vary from
approximately 325 feet (t4SL) adjacent to Tamarack Avenue to 200 in the
previously mentioned canyon areas. Vegetation at this site consisted of a
1 i ght to moderate growth of grasses and brush except in the canyon areas
where the ground cover was dense. This site is surrounded by both devel-
oped and undeveloped residential property.
PROPOSED CONSTRUCTION
One hundred and eight single family residential units are proposed at this
site. It is our understanding that these units will consist of one and/or
two story, wood-framed duplex structures. Structu ra 1 loadi ng conditi ons
resulting from these buildings will be low.
AVALIABLE PLANS
To assist in determining the locations and elevations of our field density
tests and to define the general extent of the site grading for this' phase
of work, we were provided with a grading plan prepared by Rick Engineering
Company. A copy of this plan is on file at our office which shows the
locations of our in-place density tests.
SITE PREPARATION
Prior to grading, the areas to be filled were cleared of debris and vegeta-
tion. The alluvial soils in the canyons were removed to firm natural
ground and stockpiled for future use. Subdrains were then installed as
SOUTHERN CALIFORNIA SOIL AND TESTING. INC.
,I
•
•
•
•
•
•
•
..
•
•
SCS&T 14143 August 5, 1983 Page 3
shown in the referenced reports and at the app roxi mate 1 ocat ions shown on
the approved plans. The canyons were then backfilled to the desired
finished grades. Benches and keys were established into the competent
formatioal soils to support the new fills. Oversized rocks were used in
the deeper fills in accordance with our previously outlined recofl1n~nda
tions. All clayey expansive soils were kept at least three feet from
finished grade, thus, allowing the use of conventional foundational sys-
tems.
The fill material which consisted of silty sands and fractured rock ob-
tained from cuts made on the site were placed in six (6) to eight (8) inch
layers, watered to near optimum moisture requirements and was compacted by
means of a sheepsfoot roller and heavy construction equipment.
The mass gradi ng was performed by Chil cote, Inc. of El Cajon usi ng the
following equipment:
5 -651 Scrappers
3 -0-9 Dozer
1 -0-8 Dozer
1 -455 Komatsu Dozer
1 -824 Compactor
FIELD OBSERVATION AND TESTING
1 -988 Loader
1 -t10tor Grader
1 -850 Dozer
1 -4000 Gallon Water Truck
1 -8000 Gallon Water Pull
1 - 5 x 5 Sheepsfoot
Observations and field density tests were performed by a representative of
Southern California Soil & Testing, Inc. during the mass grading opera-
tions. The density tests were taken according to A.S.T .t4. Test 1556-74
and the results of those tests are shown on the attached plates. The
locations and elevations of the in-situ tests were deter'mined in accor-
dance with their importance and the accuracy and proximity of the survey
SOUTHERN CALIF"ORNIA SOIL AND TESTING. INC.
"
I II
•
•
•
•
•
•
•
•
•
•
•
SCS&T 14143 August 5, 1983 .Page 4
control provided by other than Southern Cal ifornia Soil & Testing, Inc.
representatives. Unless otherwise noted, their locations and elevations
were determined by pacing and hand level methods and should be considered
accurate only to the degree implied by the method used.
As used herein, the term lI observation" implies only that we observed the
progress of work we agreed to be i nvol ved with, and performed tests, on
whi ch, together, we based our op; ni on as to whether the work .essent i a l1y
complies with the job requirements, local grading ordinances and the
Uniform Building Code.
LABORATORY TESTS
r·1aximum dry density determinations were performed on representative sam-
ples of the soils used in the compacted fills according to A.S.T.H Test
1557-78, Method A. This method specifies that a four (4) inch diameter
cylindrical mold of 1/30 cubic foot volume be uS,ed and that the soil
tested be placed in five (5) equal layers with each layer compacted by
twenty-five (25) blows of a 10 pound hammer with an 18 inch drop. The
results of these tests, as presented on Plate Number 1, were used in
conjunction with the field density tests to determine the degree of "rela-
tive compaction of the compacted fill.
CONCLUSIONS
Based on field observations and the density test results, it is the 9pin-"
ion of Southern Cal ifornia Soil and Testing, Inc. that the grading was
performed basically in accordance with the recorrmendations contained in
the referenced reports, and the recorrmendations contained there-in do
apply to the subject site.
This report covers only the work performed between June 2 and July 26,
1983. Additi onal test; ng wi 11 be requi red for util ity trench backfill,
for retaining wall backfill and for pavement subgrade.
SOUTHERN CALIFORNIA SOIL AND TESTING. INC.
•
•
•
•
•
•
•
•
•
•
SCS&T 14143 August 5, 1983 Page 5
Our opinions presented herein are based on our observations and the rela-..
tive compaction test results. Due to possible variations in the unifor-
mity of compacted fi 11 s, we only that our work was performed in accordance
with the currently accepted standards of practice and in such a manner as
to have reasonable certainty that the mass grading compl ies with job
requirements. No other warranty, express or implied is given or intended.
If you should have any questions after reviewing this report, please do
not hesitate to contact this office.
This opportunity to be of professional service is sincerely appreciated.
Respectfully submitted,
SOUTHERN CALIFORNIA SOIL & TESTING, INC.
~ Robert R. Russell, R.C.E. #32142
RRR:mw
cc: (6) Su bmi tted
(1) SCS&T, Escondido
SOUTHERN CALIFORNIA SOIL AND TESTIN'G. INC.
DiHE 8-2-83 JOB NO. .14143 Paae .1
• ELEV. OR DRY DEN. % T~ST DEPTH OF MOIST. LBS./ SOIL RElATIVE NO. DATE LOCATION TEST. FT. % CU. FT. TYPE COMPo
• 1 6-2-83 Catham Canyon 230 N.G. 9.9 102.3 4 85.4
2 6-2-83 Catham Canyon 232 N.G. 9.9 106.7 4 90.7
3 6-2-83 Catham Canyon 240 11.1 109;9 4 93.0
• 4 6-3-83 Catham Canyon 254 N.G. 10.5 119.7 3 98.1
5 6-3-83 Catham Canyon 243 N.G. 13.6 117.2 3 96.1
6 6-3-83 Catham Canyon 248 13.6 118.7 3 97.3
• 7 6-6-83 Lot 84 250 N.G. 13.6 121.1 3 99.3
8 6-6-83 Lot 92 247 12.4 109.2 5 95.6
9 6-6-83 Lot 93 238 13.6 104.2 5 91.2
• 10 6-6-83 Lot 95 ~42 12.4 106.5 5 93.3
11 6-6-83 Lot 98 1226 8.7 103.8 5 90.9
12 6-6-83 Lot 100 1230 9.9 117.6 4 99.4
• 13 6-7-83 Lot 83 -Slope 950 14.9 93.9 5 82.2
14 6-7-83 Lot 99 -Slope 246 13.6 86.2 5 75.5
15 6-7-83 Retest of Number 13 250 16.3 104.7 5 91. 7
• 16 6-7-83 Retest of Number 14 246 13.6 109.3 4 92.4
17 6-7-83 Lot 94 245 14.9 105.5 5 92.3
18 6-7-83 Lot 92 250 13.6 108.1 4 91.4
19 6-7-83 Elm Street 255 102.9 102.9 5 90.1
20 6-7-83 Lot 97 239 104.1 104.1 5 91.2
21 6-7-83 Lot 100/101 ~32 N.G. 102.7 102.7 5 90.0 .. 22 6-7-83 Lot 102 ~34 104.7 lOLl.7. 5 91. 7
23 6-7-83 Lot 103 ~42 103.9 103.9 5 90.9
24 6-7-83 Lot 104 D44 110.8 110.8 4 93.7
25 6-7-83 Lot 91 1:>48 103.8 103.8 5 90 .• 7
•
•
•
•
•
•
•
•
'.-
--
' .
•
TEST
NO.
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
DATE LOCATION
6-7-83 Lot 94
6-7-83 Lot 99
6-7-83' Lot 102
6-7-83 Lot 94
6-7-83 Catham Canyon
6-7-83 Catham Canyon
6-8-83 Catham Canyon
6-8-83 Catham Canyon
6-8-83 Catham Canyon
6-8-83 Catham Canyon
6-8-83 Catham Canyon
6-8-83 Catham Canyon
6-8-83 Catham Canyon
6-8-83 Catham Canyon
6-8-83 Catham Canyon
6-9-83 Catham Canyon
6-9-83 Catham Canyon
6-9-83 Catham Canyon
6-9-83 Catham Canyon
6-13-83 Lot 71
6-13-83 Lot 74
6-14-83 Lot 76
6-14-83 Lot 77
6-14-83 Lot 79
6-14-83 Lot 82
0/\ TE, __ -8_-_2_-8_3 __
ELEV. OR
DEPTH OF MOIST.
TEST. FT. %
250 14.9
248 14.3
248 16.3
253 14.9
262 ~4.9
212 13.6
213 12.4
216 15.6
218 14.3
218 11. J.
222 17.6
227 12.4
232 13.6
231 15.6
234 14.3
232 14.9
240-14.9
243 15.6
240 16.3
248 13.6
232 14.3
215 14.3
218 14.3
238 14.9
246 14.9
JOB NO. 14143 Paoe 2
DRY DEN'.
LBS./
CU. FT.
110.9
106.0
110.4
110.1
102.6
103.4
103.5
105.0
102.7
104.6
107.9
109.7
116.5
115.9
112.5
113.3
111. 7
112.8
109.9
112.9
111.5
113.4
115.1
114.8
110.2
%
SOIL RELATIVE
TYPE COMPo
4 93.7
5 92.8
4 93.3
4 93.1
5 90.0
5 90.5
5 90.6
4 97.2
5 90.0
5 91.6
4 91.2
4 92.7
4 90.0
4 07.9
3 92.2
4 93.3
4 93.6
4 94.5
4 92.1
4 95.4
4 94.2
4 96.1
4 97.3
4 97.0
4 93.1
•
•
•
•
-.
•
•
TEST
NO.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
6q
67
'68
69
70
71
72
73
74
75
DATE LOCATION
6-14-83 Catham Canyon
6-14-83 Catham Canyon
6-14-83 Lot 73
6-14-83 Lot 75
6-14-83 Lot 77
6-15-83 Lot 79
6-15-83 Lot 81
6-15-83 Catham Canyon -Slope
6-15-83 Catham Canyon -Slope
6-15-83 Lot 75
6-15-83 Lot 94 -Slope
6-15-83 Lot 84
6-15-83 Lot 72
6-15-83 Lot 74
6-16-83 Retest of Number 61
6-16-83 Retest of Number 62
6-16-83 Lot 104
6-16-83 Lot 76
6-16-83 Lot 77
6-16-83 Lot 74
6-16-83 Lot 79
6-16-83 Lot 82
6-16-83 Lot 79
6-17-83 Catham Canyon
6-17-83 Catham Canyon
O/\TE 8-2-83
ELEV. OR
DEPTH OF MOIST.
TEST. FT. %
244 9.9
242 11.1
236 11.1
238 12.4
240 13.0
243 14.9
248 17.0
250 13.0
248 15.6
250 15.6
242 17.6
256 16.9
250 13.6
248 14.3
242 14.3
256 14.9
246 1.4.3
247 15.6
246 16.3
250 16.3
240 13.6
250 13.6
243 15.6
247 9.9
252 14.9
JOB NO. 14143 Page 3
DRY DEN.
LBS./
CU. FT.
107 .3
108.D
110.4
109.9
109.9
115.8
111.0
100.7
101.9
115.6
97.6
96.2
112.0
112.9
1.02.1
104.5
111.8
106.0
104.9
104.1
106.5
111.9
113.8
107.7
109.9
%
SOIL RELATIVE
TYPE COMPo
4 90.7
4 91.3
4 93.3
4 92.9
4 92.9
4 97.9
4 93.2
5 88.2
5 89.3
5 97.7
5 85.4
5 84.2
4 94.7
4 95.4
5 90.0
5 91.'5
4 94.5
5 92.8
5 91.8
5 91.2
4 93 •. 2
4 98.0
4 97.0
4 94.,1
4 96.2
•
•
•
•
•
•
•
•
•
•
•
TEST
NO.
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
DATE LOCATION
6-17-83 Elm Street
6-20-83 Lot 21
6-20-83 Lot 23
6-20-83 Lot 27
6-20-83 Nantucket Court
6-20-83 Nantucket Court
6-20-83 Nantucket Court
6-20-83 Lot 83
6-21-83 Lot 91
6-21-83 Lot 95
6-21-83 Lot 101
6-21-83 Lot 93
6-21-83 Lot 97
6-21-83 Lot 100
6-21-83 Lot .104
6-22-83 Lot 25
6-22-83 Lot 27
6-22-83 Lot 26
6-22-83 Lot 28
6-22-83 Lot 26
-6-23-83 Lot 27 -Slope
6~23-83 Lot 25 -Slope
6-23-83 Lot 84
6-23-83 Lot 92
6-23-83 Lot 94
D/HE 8-2-83
ELEV. OR
DEPTH OF MOIST.
TEST. FT. %
14.9
256 N.G. 15.6
258 15.6
255 14.9
257 14.3
256 13.6
261 14.9
252 14.9
246 9.9
242 12.4
238 13.6
250 15.6
254 14.9
244 15.6
251 14.9
263 14.3
265 14.3
264 15.6
267 15.6
266 15.6
262 15.6
266 15.6
255 13.6
254 13.6
253 14.9
JOB NO . __ 1_41_4_3 __ Pa_9_e 4
DRY DEN.
LBS./
CU. FT.
112.9
112.8
107.8
110.5
103.6
105.1
105 .. 0
103.8
103.7
104.0
102.6
107.8
113.4
113.5
110.8
108.8
107.3
113.0
113.8
115.4
102.8
101.9
112.6
113.9
109.1
% SOIL RELATIVE
TYPE COMPo
5 98.8
5 98.7
5 94.4
5 96.7
5 90.7
5 92.0
5 92.0
5 90.9
5. 90.8
5 91.1
5 90.0
5 94.4
5 95.9
5 96.0
5 97.0
5 95.,3
5 94.0
4 95.5
4 96.1
4 97.5
5 90.0
5 89.2
5 98.6
5 99.7
5 95.5
r Dl\TE 8-2-83 JOB NO. 14143 Page S
ELEV. OR DRY DEN. % TEST DEPTH OF MOIST. LBS./ SOIL RELATI VE NO. DATE LOCATION TEST. FT. % CU. FT. TYPE COMPo
101 6-23-83 Lot 97 254 14.9 107.2 5 93.9
102 6-23-83 Lot 100 253 13.6 104.3 5 91.3
103 6-23-83 Lot 102 252 14.3 104.6 5 91.6
104 6-23-83 Lot 101 254 FG 14.3 110.1 5 96.4
105 6-28-83 Lot 98 256 FG 14.3 111.4 5 97.6
106 6-28-83 Lot 95 257 FG 12.4 108.2 5 94.8
• 107 6-28-83 Lot 91 258 FG 13.6 108.5 5 95.0
108 6-28-83 Lot 83 258.5 13.6 105.6 5 92.4
109 6-29-83 Lot 57 256 NG 12.4 107.8 5 94.4
• 110 6-29-83 Lqt 60 259 12.4 110.0 4 9'2.9
111 6-29-83 Lot 62 262 14.9 116.4 , 3 95.4
112 6-29-83 Lot 64 264 ,14.9 105.8 4 90.0
• 113 6-29-83 Lot 60 266 14.9 107:9 4 91.1
114 6-29-83 Lot 63 268 15.6 114.6 3 93.9
115 6-29-8,3 Lot 62 270 14.3 116;8 3 95.7
• 116 6-29-83 Lot 66 266 14.9 113.4 3 93.4
117 6-29-83 Lot 64 270 12.4 115.9 3 95.0
118 6-29-83 Lot 58 273 13.6 114.8 3 94.1
• 119 7-12-83 Elm Street 284 . 14.3 118.5 3 97.1
120 7-12-83 Elm Street 281 14.3 114.6 3 93.9
121 7-13-83 Lot 88 246 FG 13.4 106.2 4 92.9
• 122 7-13-83 Lot 71 253 FG 9.8 118.9 2 98.9
123 7-13-83 Lot 80 250 FG 9.5 113.9 5 99.7
124 7-13-83 Retest #58 250 10.2 109.7 5 96.1
• 125 7-13-83 Retest #59 248 15.6 104!S 5 91.5
•
DATE 8-2-83 JOB NO. 14143 Page 6
• TEST ELEV. OR DRY DEN. %.
DEPTH OF MOIST. LBS,./ SOIL RELATIVE NO. DATE LOCATION TEST. FT. % CU. FT. TYPE COMPo
• 126 7-13"-83 Lot 78 -Slope 240 9.0 106.6 5 93.4
127 7-13-83 Lot 78 249 FG 8.4 114 . .2 2 95.0
128 7-18-83 Lot 57 274 9.9 103.2 5 90.4
• 129 7-18-83 Lot 55 276 FG 11.1 102.8 5 90.0
130 7-18-83 Lot 63 272 FG 11.1 103.6 5 90.7
131 7,'18-83 Lot 53 275 11.1 104.5 5 91.5
• 132 7-18-83 Lot 61 273 FG 12.4 105.4 5 92.3 ,
I "I
1
133 7 18-83 Lot 65 270 13.0 107.3 5 93.9 1
134 7-18-83 Lot 59 274 FG 9.9 104.0 5 91.1
• 135 7-18-83 Lot 73 251. 5 F 13.6 105.8 5 92.6
136 7-18-83 Lot 82 252 FG 13.6 104.3 5 91:4
137 7-18-83 Lot 81 -Slope 240 14.3 109.8 5 96.1
• 138 " 7-21-83 Lot 41 273 FG 11.1 i09~\5 "5 95.9
139 7-21-83 Lot 40 249 FG 8.9 111.5 5 97.6
140 7-21-83 Lot 52 276 FG 13.1 105.9 5 9'2.7
• 141 7-21-83 Lot 61 -Slope 265 11.1 99.6 5 87.2
"142 7-21-83 Lot 64 272 13~6 101.8 5 90.0
143 7-21-83 Lot 66 270 11.1 110.6 5 -96.8
• 144 7-21-83 Lot 64 -Slope 269 ~2.0 113.5 5 99.4
145 7-21-83 Lot 66 271 FG 14.4 103.6 5 90.7
146 7-21-83 Lot 61 271 14.4 105.3 5 92.2
• 147 7-21-83 Lot 59 -Slope 270 16.3 98.7 5 86.4 !
148 7-21-83 Lot 35 279.5 F 9.0 113.9 4 96.2
149 7-21-83 Lot 49 278 FG 8'.'8 115.1 4 -97.3
• 150 7-21-83 Lot 36 277 8.2 112.3 5 98.3 /
• r "-"" -"-
•
•
•
•
•
•
•
•
•
•
•
TEST
NO.
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
DATE LOCATION
7-21-83 Lot 37
7-21-83 Lot 23
7-21-83 Lot 21
7-21-83 Lot 27
7-25-83 Lot 54
7-25-83 Lot 43
7-25-83 Lot 70
7-25-83 Lot 33
7-25-83 Lot 24
7-25-83 Lot 29
7-25-83 Lot 23
7-25-83 Retest #97
7-26-83 Lot 37
7-26-83 Lot 25
7-26-83 Lot 30
7-26-83 Retest of Number 141
7-26-83 Retest of Number 147
Catham Canyon -Slope
Catham Canyon -Slope
Catham Canyon -Slope
Catham Canyon -Slope
Lot 74 -Slope
Lot 75 -Slope
Lot 77 -Slope
0/\ TE. __ 8-_2_-8_3 __
ELEV. OR
DEPTH OF MOIST.
TEST. FT. %
263 10.6
237 7.8
279 7.6
267 8.1
276 FG 8.1
271 FG 11.1
273.5 11.1
277 FG 7.5
264 FG 11.1
270 13,6
262 FG 13.0
266 11.1
278 FG 13.6
268 FG 12.4
272 FG 13.6
265 12.4
270 11.1
251 16 .. 6
247 13.3
251 16.3
246 11.6
216 1~.2
244 11.6
235 10.2
JOB NO. 14143 Page 7
DRY DEN.
LBS./
CU. FT.
107.9
106.2
106.9
11.5
109.8
107.9
108.4
105.9
112.9
110.8
107.9 .
106.3
107.2
109.3
110.6
106.8
103.0
105.0
107.4
107.0
108.0
10J.7
108.5
110.0
% SOIL RELATI VE
TYPE COMPo
5 94.5
5 92.9
5 93.6
5 97.6
5 96.2
5 94.5
5 94.9
5 92.7
5 98.8
5 97.1
5 94.5
5 93.1
5 93.8
5 95.6
5 96.8
5 93.5
5 90.2
5 91.9
5 93.7
5 93.7
5 92.9
5 90.8
5 95.0
5 96.4
•
•
•
•
•
•
•
•
•
SOIL TYPE OPTIMUM MOISTURE
(eercent)
1 14.1
2 10.9
3 10.5
4 11.3
5 10.7
MAXIMUM DRY DENSITY
(lbs~/Ci.l.ft.)
118.2
120.2
122.0
119.3
114.2
SCS&T 14143
8-5-83
SOUTHERN CALIFORNIA SOIL AND TESTING. INC.