HomeMy WebLinkAboutCT 01-09; LA COSTA TOWN SQUARE BUILDING 15 MICHAELS; FINAL SOILS REPORT; 2016-01-29APPENDIX I
SUBSURFACE EXPLORATION
APPENDIX I
The subsurface conditions were explored by digging 7 test pits on December 16, 2015 to depths
between about 1 ½ feet and 6½ feet below the existing ground surface using a back hoe and hand
tools . Figure 2 show the approximate locations of the test pits. The field investigation was
performed under the observation of an SCST engineer who also logged the test pits and obtained
samples of the materials encountered.
The soils are classified in accordance with the Unified Soil Classification System as illustrated
on Figure 1-1. Logs of the test pits are presented on Figures 1-2 through 1-8.
LOG OF EXPLORATORY BORING T-3
Date Drilled: 12/16/2015 Logged by: AKN
Equipment: CAT 420F2 with 18-inch bucket Project Manager: TH
Elevation (ft): Estimated 335 Depth to Groundwater (ft): Not encountered
SAMPLES ~ 13 ~ (f)
I-8 I-z I-(f)
w w
:S I-I I-
(f) z CJ >-
I 0 z 0 w a:
I-(f) w ~ 0 s 0
0... SUMMARY OF SUBSURFACE CONDITIONS > _J I-w ::::, a: ::::, w t:: <(
0 (() a: z a: 0 ::::, ::::, 0 I-(f) >-(()
0 a: <(
_J
~ 0
CL FILL (Qf): SANDY CLAY with GRAVEL, light brown, very moist, soft to medium stiff,
'-½ cobbles up to 6-inches in diameter.
'-1
'--1½
I-2
-2½ CH FAT CLAY with GRAVEL, greenish gray, moist, very stiff, boulders up to 18-inches or
more in diameter. '-3
-3½
-4
-4½ TEST PIT TERMINATED AT 4½ FEET
-5
-5½
I-6
i-6½
-7
-7½
-8
-8½
-9
-9½
-10
~c~ La Costa Town Square Lot 15
SOUTHERN CALIFORNIA Carlsbad, CA w ii~ SOIL & TESTING, INC. By: EM December, 2015
Job Number: 150536N-1 1-4
LOG OF EXPLORATORY TEST PIT T-5
Date Drilled: 12/16/201 5 Logged by: AKN
Equipment: CAT 420F2 with 18-inch bucket Project Manager: TH
Elevation (ft): Estimated 340 Feet Depth to Groundwater (ft): Not encountered
SAMPLES ~ 'G ~ (/)
f--E, f--z f--(/)
w w
g f--I f--
(/) z S2 >-
I 0 z 0 w a::
f--w ~ 0 s 0 a.. (/) SUMMARY OF SUBSURFACE CONDITIONS > ....J f--w ::::i ii: ::::i w t:: <(
0 £l) a:: z a:: 0 ::::i ::::i 0 f--(/) >-£l)
6 a:: <( ....J
~ 0
SC FILL (Qf): CLAYEY SAND with GRAVEL, light brown, moist, dense to very dense.
-½
'-1 '
'-1½ TEST PIT TERMINATED AT 1 ½ FEET
-2
-2½
-3
-3½
- 4
-4½
-5
-5½
-6
-6½
'-7
-7½
-8
-8½
-9
-9½
-10
~ I.? La Costa Town Square Lot 15 z
ii: SOUTH ERN CALIFORNIA Carlsbad, CA w w s iii SOIL & TESTING, INC. By: EM December, 2015
Job Number: 150536N-1 1-6
•
LOG OF EXPLORATORY TEST PIT T-7
Date Drilled: 12/16/201 5 Logged by: AKN
Equipment: CAT 420F2 with 18-inch bucket Project Manager: TH
Elevation (ft): Estimated 340 Feet Depth to Groundwater (ft): Not encountered
SAMPLES ~ ~ 't, (/)
I--3: I-z I-(/)
w w
g I-I I-z ('.J >-
I (/) z 0 w a:
I-() w ~ () s 0 a.. (/) SUMMARY OF SUBSURFACE CONDITIONS > _J I-w ::> a: ::> w t: <(
0 co a: z a: 0 ::> ::> 0 I-(/) >-co
0 a: <(
0 _J
2
SC FILL (Qt): CLAYEY SAND with GRAVEL, light brown, moist, dense to very dense.
I-½
I-1
-1½ TEST PIT TERMINATED AT 1 ½ FEET
-2
-2½
-3
-3½
- 4
-4½
-5
-5½
-6
--6½
I-7
-7½
-8
-8½
-9
-9½
-10
~ l.7 La Costa Town Square Lot 15 z ii: SOUTHERN CALIFORNIA Carlsbad, CA w w iii SOIL & TESTING, INC. By: EM December, 2015
Job Number: 150536N-1 1-8
JOB NAME: La Costa Square -Lot 15 JOB NUMBER: 150536N.1
IN-PLACE DENSITY TESTS
TEST ELEVATION MOISTURE DRY DENSITY SOIL REL.COMP.
NO. DATE LOCATION (feet,MSL) (percent) (p.c.f.) TYPE (percent)
MAXIMUM DENSITY AND OPTIMUM MOISTURE SUMMARY (ASTM D1557)
Soil Maximum Optimum
_TuQg Soil Description Densitll1 pcf Moisture1 %
1 Tan Fine Silty Sand 113.3 14.5
2 Tan Fine Silty Sand 106.3 14.7
3 Brown Clayey Sand 119.2 9.7
5 Brown Clayey Sand 129.8 9.1
5a Rock Percent-%5 131.4 8.7
5b Rock Percent-% 10 133.1 8.3
5c Rock Percent-% 15 134.8 7.9
5d Rock Percent-%20 136.5 7.5
5e Rock Percent-%25 138.3 7.1
5f Rock Percent-%30 140.1 6.7
9 Brownish Tan Clayey Sand with Gravel 128.0 9.1
10 Brown Silty Sand 125.4 8.6
11 Tan Silty Sand 127.2 9.2
17 -3" Screening Res. "Cut" 127.5 10.2
17a Rock Percent-%5 128.7 9.8
17b Rock Percent-% 10 130.0 9.3
17c Rock Percent-% 15 131.2 8.9
17d Rock Percent-%20 132.5 8.4
17e Rock Percent-%25 133.9 8.0
17f Rock Percent-%30 135.2 7.5
22 3" Manufactured Capping Material 133.0 10.5
22a Rock Percent-%5 134.4 10.0
22b Rock Percent-% 10 135.8 9.6
22c Rock Percent-% 15 137.2 9.1
22d Rock Percent-%20 138.6 8.7
22e Rock Percent-%25 140.1 8.2
22f Rock Percent-%43 145.7 6.5
B1 Class II Base 137.3 8.2
TABLE 2