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 silt, silt distributed in
laminae, dark gray (10YR-4/1), (CL).
LEAN CLAY, soft, some silt, trace sand, fine grained,
quartz, trace shell fragments, trace shell hash, silt
distributed in laminae and throughout layer, sand
distributed in laminae, (1.0" x 1.5") bivalve fragment
@ 5.3', dark gray (5Y-4/1), (CL).
LEAN CLAY, very stiff, little sand, fine grained, quartz,
trace organics, trace shell fragments, shell fragments
are bivalve fragments up to 0.25", color is mottled
light olive brown (2.5Y-5/4) and greenish gray
(10Y-6/1),(CL).
FAT CLAY, hard, little organics, little sand, fine
grained, quartz, trace shell fragments, trace silt, trace
whole shell, sand typically distributed in laminae, shell
fragments are bivalve fragments typically up to 1.0",
2.0" sand pocket @ 10.4', 1.5" bivalve fragment @
13.0', (1.5" x 1.75") whole articulated bivalve @ 14.3',
light brownish gray (2.5Y-6/2), (CH).
Sandy FAT CLAY, very stiff, little organics, trace shell
fragments, trace silt, trace whole shell, sand
component is fine grained quartz in wavy bedding,
shell fragments are bivalve fragments up to 0.75",
(1.5" x 1.75") whole articulated bivalve @ 15.0', (0.75"
x 1.25") whole articulated bivalve @ 15.4', (1.5" x
1.75") whole bivalve @ 17.2', color is mottled white
(2.5Y-8/1), yellowish brown (10YR-5/4) and light
brownish gray (2.5Y-6/2), (CH).
No recovery.
End of Boring
-33.8
-38.0
-39.6
-44.9
-48.3
-49.3
3.6
7.8
9.4
14.7
18.1
19.1
T1
T2
T3
Sample #T1, Depth = 9.1'
Ave. Field Vane (tsf): 0.31
Sample #T2, Depth = 11.9'
Ave. Field Vane (tsf): 0.51
Sample #T3, Depth = 14.1'
Ave. Field Vane (tsf): 0.61
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
18.1 Ft.
SF
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
19.1 Ft.
STARTED
3.0 In.
X = 3,561,429 Y = 13,791,405
-30.2
VERTICAL
VERTICAL
INCLINED
0.0 Ft.
8. TOTAL DEPTH OF BORING
TXGLO1-VC-23-004
AUTO HAMMER
MANUAL HAMMER
APTIM
6. THICKNESS OF OVERBURDEN
CONTRACTOR FILE NO.
7. DEPTH DRILLED INTO ROCK
10-06-23
-30.2 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
10-06-23
%
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-23-004
JUN 04
SAJ FORM 1836
OF 1 SHEETS
REGION1_RECON_GEOTECH.GPJ 3/25/24
1
5
'
1'
16'
..,, ..
4 .
2'
12'
17'
..
18
'
14'
1
9
'
1
5
'
20'
Texas General
Land Office
Texas GLO
Region 1
Geotechnical
Reconnaissance
Survey
TXG LOl-VC-23-004
Da te Collected:
10/6/23
Top Elev. (ft NAVD88): -30.2
Bottom Elev. (ft NAVD88): -48.3
Core Length (ft): 18.1
>,
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
TXGLO1-VC-23-001
3.0
1.5
0.15
147.10
Stiff
6.0
1.0
0.10
98.07
Stiff
10.3
4.5
0.46
441.30
Hard
13.4
5.5
0.56
539.37
Hard
16.3
2.5
0.26
245.17
Very Stiff
9.1
3.0
0.31
294.20
Very Stiff
11.9
5.0
0.51
490.33
Hard
14.1
6.0
0.61
588.40
Hard
4.8
6.0
0.61
588.40
Hard
7.5
5.0
0.51
490.33
Hard
13.5
5.5
0.56
539.37
Hard
16.5
3.5
0.36
343.23
Hard
TXGLO1-VC-23-006
9.0
5.5
0.56
539.37
Hard
15.1
1.5
0.15
147.10
Stiff
7.1
5.5
0.56
539.37
Hard
8.1
9.0
0.92
882.60
Hard
10.2
8.0
0.82
784.53
Hard
16.0
