Aptim Environmental & Infrastructure, LLC
6401 Congress Avenue, Suite 140
Boca Raton, Florida 33487
Phone # 1-561-391-8102
Legend for Geotechnical Data
Grain Size Scale for Sediments
Proportional Definition of Descriptive Terms
Descriptive Term
Range of Proportions
Sandy, gravelly, etc.
35 % to 50 %
Some
20 % to 35 %
Little
10 % to 20 %
Trace
1 % to 10 %
Consistency of Cohesive Soils
Description
Consistency
Index
Approximate
Undrained Shear
Strength (kPa)
Field Identification
Hard
Over 300
Indented with difficulty by thumbnail, brittle.
Very Stiff
>1
150-300
Readily indented by thumbnail, still very tough.
Stiff
0.75-1
75-150
Readily indented by thumb but penetrated only with difficulty. Cannot
be moulded in the fingers.
Firm
0.5-0.75
40-75
Can be penetrated several centimeters by thumb with moderate effort
and moulded in fingers by strong pressure.
Soft
< 0.5
20-40
Easily penetrated several centimeters by thumb, easily moulded.
Very Soft
Less than 20
Easily penetrated several centimeters by fist, exudes between fingers
when squeezed in fist.
Source:
Engineering Properties of Soils and Rocks, Fourth Edition by Fred G. Bell
USCS Classifications
Refers to the Army Corps of Engineers Unified Soils Classification System. Class types
are defined primarily by grain size, sorting and percent of material passing the #200 sieve.
Classification of materials on the core logs based on visual field examinations are identified on
the core logs under the Classification of Materials Description. Classifications based on
laboratory sieve analyses are identified on the core logs in the Legend and under Remarks.
Note:
Information is after ACOE Atlantic Division Manual # 1110-1-1 titled
Engineering and Design
Geotechnical Manual for Surface and Subsurface Investigations
LEAN CLAY, very soft, trace shell hash, trace silt,
shell hash and silt distributed in laminae, very dark
gray (2.5Y-3/1), (CL).
LEAN CLAY, firm, trace coral, trace sand, fine
grained, quartz, trace shell fragments, trace shell
hash, trace silt, silt distributed in laminae, shell hash
distributed between 2.7' & 3.2', 0.5" bivalve fragment
@ 2.9', sand distributed in laminae between 3.2' &
4.2', (0.5" x 0.75") coral fragment with annelids @
3.2', dark greenish gray (5GY-4/1), (CL).
SAND, fine grained, quartz, trace clay, firm, trace shell
hash, trace silt, silt and fat clay interbedded with sand,
shell hash typically distributed in laminae between 6.6'
& 6.8', 3.0" pocket of shell hash @ 8.3', gray
(2.5Y-5/1), (SW-SM).
Sandy SILT, little clay, trace shell fragments, trace
whole shell, sand component is fine grained quartz,
clay distributed in pockets up to 1.5", (0.25" x 0.5")
whole bivalve @ 9.0', shell fragments distributed
between 10.3' & 10.5', dark greenish gray (10GY-4/1),
(ML).
SAND, fine grained, quartz, little clay, trace shell hash,
trace silt, shell hash distributed between 11.0' & 11.6',
1.5" clay pocket @ 12.4', 2.75" clay pocket @ 13.2',
gray (5Y-5/1), (SW-SM).
FAT CLAY, firm, little sand, fine grained, quartz, trace
shell hash, trace silt, interbedded sand and clay
throughout layer, shell hash distributed within sand,
dark greenish gray (10GY-4/1), (CH).
FAT CLAY, firm, trace shell fragments, trace silt, trace
whole shell, shell fragments are typically bivalve
fragments up to 2.0", (1.0" x 1.25") shell fragment with
annelids @ 15.6', 2.0" gastropod fragment and 3.0"
whole bivalve @ 17.3', gray (N-5/0), (CH).
FAT CLAY, very stiff, trace sand, fine grained, quartz,
sand distributed in laminae, Bit sample from 18.7' to
19.0', gray (N-5/0), (CH).
No recovery.
End of Boring
-20.1
-23.3
-27.6
-29.8
-32.6
-34.2
-36.6
-38.1
-38.5
1.0
4.2
8.5
10.7
13.5
15.1
17.5
19.0
19.4
T1
T2
T3
Sample #T1, Depth = 0.5'
Ave. Field Vane (tsf): 0.00
Sample #T2, Depth = 2.2'
Ave. Field Vane (tsf): 0.05
Sample #T3, Depth = 18.0'
Ave. Field Vane (tsf): 0.26
3. DRILLING AGENCY
2. BORING DESIGNATION
0
0.0 Ft.
LOCATION COORDINATES (ft)
TX GLO Region 1 Recon Geotechnical Sand Search
Jefferson, Chambers, Galveston and Brazoria Co.
15. DATE BORING
0.0
19 Ft.
SM
10. COORDINATE SYSTEM/DATUM
11. MANUFACTURER'S DESIGNATION OF DRILL
DISTURBED
UNDISTURBED (UD)
18. SIGNATURE AND TITLE OF INSPECTOR
14. ELEVATION GROUND WATER
Texas State Plane South
COMPLETED
19.4 Ft.
STARTED
3.0 In.
X = 3,340,423 Y = 13,713,939
-19.1
VERTICAL
VERTICAL
INCLINED
0.0 Ft.
8. TOTAL DEPTH OF BORING
TXGLO1-VC-23-053
AUTO HAMMER
MANUAL HAMMER
APTIM
6. THICKNESS OF OVERBURDEN
CONTRACTOR FILE NO.
7. DEPTH DRILLED INTO ROCK
10-12-23
-19.1 Ft.
DIVISION
INSTALLATION
16. ELEVATION TOP OF BORING
17. TOTAL RECOVERY FOR BORING
NAVD88
3
APTIM SEAS VC-700 Vibracore
9. SIZE AND TYPE OF BIT
12. TOTAL SAMPLES
13. TOTAL NUMBER CORE BOXES
DEG. FROM
VERTICAL
5. DIRECTION OF BORING
BEARING
4. NAME OF DRILLER
HORIZONTAL
APTIM
DRILLING LOG
NAD 1983
1. PROJECT
10-12-23
%
REC.
Boring Designation
REMARKS
The USCS classification system defines silt as the
percent passing the No.200 (0.075 mm) sieve
SHEET 1
BOX OR
SAMPLE
CLASSIFICATION OF MATERIALS
Depths and elevations based on measured values
ELEV.
(ft)
LEGEND
DEPTH
(ft)
0
5
10
15
20
25
TXGLO1-VC-23-053
JUN 04
SAJ FORM 1836
OF 1 SHEETS
REGION1_RECON_GEOTECH.GPJ 3/25/24
15
'
16
'
17'
(
18'
1
19'
20'
Texas General
Land Office
Texas GLO
Region 1
Geotechnical
Reconnaissance
Survey
TXGLOl-VC-23-0
53
Date Collected: 10/12/23
Top Elev.(ft NAVD88): -19.1
Bottom Elev.(ft NAVD88): -38.1
Core Length (ft):19.0
>
APTIM
6401 Congress Avenue, Suite 140
Boca Raton, FL 33487
(561)391-8102
CORE ID
SAMPLE DEPTH
(ft)
TORVANE
(kg/cm²)
TORVANE
(tsf)
TORVANE
(kpa)
DESCRIPTION
1
Mini Vane Shear Test Results
2.2
2.8
0.28
269.68
Very Stiff
4.8
1.5
0.15
147.10
Stiff
3.0
1.5
0.15
147.10
Stiff
4.0
5.0
0.51
490.33
Hard
5.1
1.5
0.15
147.10
Stiff
9.4
6.5
0.67
637.43
Hard
15.5
9.5
0.97
931.63
Hard
4.8
1.0
0.10
98.07
Stiff
8.1
1.5
0.15
147.10
Stiff
10.4
2.0
0.20
196.13
Very Stiff
11.7
2.0
0.20
196.13
Very Stiff
14.7
2.5
0.26
245.17
Very Stiff
1.0
1.0
0.10
98.07
Stiff
1.8
1.5
0.15
147.10
Stiff
3.1
3.5
0.36
343.23
Hard
6.4
10.0
1.02
980.67
Hard
11.0
10.0
1.02
980.67
Hard
1.0
0.0
0.00
0.00
Very Soft
3.0
0.0
0.00
0.00
Very Soft
11.5
7.5
