Hammond- LR150508 RUNE GEOTECHNICAL ENGINEERING
ENVIRONMENTAL CONSULTING
ENGINEERING CONSTRUCTION MATERIAL TESTING
May 8, 2015
Mr. Jason Rose
Hass Rose at Lost Creek, LLC
141 Dickens Drive
Coppell, Texas 75019
RE: Moisture Evaluation No. 1
Hammond Street Townhomes
Coppell, Texas
Rone Project No. 15-20110
Dear Mr. Rose,
Rone Engineering Services, Ltd. (Rone) recently visited the referenced site to drill verification
borings following several passes of water injection. The first set of borings were drilled on April
23, 2015 and the second set of borings were drilled on April 30, 2015. This letter summarizes
our test results and recommendations.
Moisture conditions at the site were evaluated with ten verification borings at this time. The
Borings are identified as:
Borings B-1 through B-7, B-3R, B-10 and B-11
The first set of borings (B-1 through B-7) were drilled in every other lots covering Lots 1
through 13. Continuous Shelby tube samples were obtained to a depth of 12 feet below the
existing ground surface. The samples were wrapped in the field to preserve their moisture
content and returned to our laboratory for testing. Laboratory testing included free swell tests
to aid in assessing swell characteristics of the injected soils, along with moisture content
determinations and hand penetrometer strength tests. We understand it is desired to limit the
swell potential to 3-inches or less.
Swell test results ranged from 0.4 percent to 4.9 percent in the samples tested for the first set
of borings (B-1 through B-7). Hand penetrometer readings generally ranged from 1.00 tsf to
4.50+ tsf indicating soft to hard clay. Based on the swell test results and the available
geotechnical information, it is our opinion that the swell potential of the injected subgrade at
boring locations B-1, B-2 and B-4 through B-7 will be 3-inches or less.
However, the injected subgrade at boring location B-3 did not meet the swell potential of 3-
inches or less. Therefore, swell potential was re-evaluated for Lots 4 through 6 (corresponding
to verification Boring B-3) following additional passes of water injection. Three more
DALLAS I FORT WORTH I AUSTIN I SAN ANTONIO HOUSTON
——_——_——_-______________7
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SCALE:NTS
PROJECT NO: 15-20110
PLATE A.1 FILE NAME: 1520110.DWG
R O N E BORING LOCATION DIAGRAM
DRAWN BY: CM DATE: 5-7-2015
HAMMOND STREET TOWNHOMES REVISED BY: DATE:
E N G I N E E R I N G HAMMOND STREET REVISED BY: DATE:
COPPELL,TEXAS APPROVED BY: PT DATE: 5-7-2015
HAMMOND STREET TOWNHOMES
MOISTURE EVALUATION
LOTS 1 THROUGH 13
APRIL 23, 2015
Boring No. Sample Moisture Hand Free Final Moisture
Depth (ft) Content (%) Penetrometer Swell Content After
(tsf) (%) Swell (%)
0-1 23 2.50
1-2 24 2.25
2-3 23 2.00
3-4 21 3.00 0.5 22
4-5 22 3.00
B- 1 5-6 24 2.50
6-7 25 2.50
7-8 25 2.75 0.8 26
8-9 24 3.00
9-10 24 3.25
10-11 24 3.50 0.5 24
11-12 21 4.00
0-1 22 2.25
1-2 21 1.50
2-3 25 1.50
3-4 25 2.50 0.9 26
4-5 25 2.75
B- 2 5-6 26 2.50
6-7 25 2.75
7-8 24 3.50 1.3 25
8-9 23 3.75
9-10 20 4.5+ 3.3 23
10-11 21 4.50
11-12 19 4.5+
0-1 32 1.50
1-2 21 2.50
2-3 25 1.75
3-4 28 2.25 0.9 29
4-5 28 2.50
B- 3 5-6 23 4.5+
6-7 23 4.5+ 4.9 27
7-8 24 4.5+
8-9 23 4.5+
9-10 23 4.5+ 4.1 27
10-11 25 2.25
11-12 22 4.5+
HAMMOND STREET TOWNHOMES
MOISTURE EVALUATION
LOTS 1 THROUGH 13
APRIL 23, 2015
Boring No. Sample Moisture Hand -Free Final Moisture
Depth (ft) Content (%) Penetrometer Swell Content After
(tsf) (%) Swell (%)
0-1 29 1.00
1-2 23 2.25
2-3 24 2.75
3-4 25 2.75 1.3 26
4-5 27 2.75
B-4 5-6 26 2.50
6-7 27 2.25
7-8 23 4.25 2.5 25
8-9 21 4.50
9-10 20 4.5+
10-11 24 3.00
11-12 20 4.5+ 2.0 21
0-1 26 1.75
1-2 24 2.00
2-3 27 2.50 0.7 27
3-4 28 2.25
4-5 26 3.00
B- 5 5-6 26 3.00 0.7 27
6-7 25 3.00
7-8 23 3.75
8-9 21 3.25
9-10 20 3.50 0.7 21
10-11 19 4.50
11-12 20 3.75
0-1 27 2.00
1-2 21 2.50
2-3 27 3.00 1.1 28
3-4 27 2.50
4-5 27 2.50
B- 6 5-6 26 4.25 2.4 29
6-7 25 4.00
7-8 23 4.25
8-9 25 3.75 1.9 27
9-10 24 3.25
10-11 19 3.75
11-12 16 4.5+
HAMMOND STREET TOWNHOMES
MOISTURE EVALUATION
LOTS 1 THROUGH 13
APRIL 23, 2015
Boring No. Sample Moisture Hand Free Final Moisture
Depth (ft) Content (%) Penetrometer Swell Content After
(tsf) (%) Swell (%)
0-1 22 2.00
1-2 19 2.50
2-3 23 2.75 0.8 24
3-4 23 2.00
4-5 23 2.75
B- 7 5-6 22 3.00
6-7 21 4.50 1.1 22
7-8 16 4.5+
8-9 23 4.5+ 0.4 24
9-10 16 4.00
10-11 17 4.25
11-12 18 4.00
HAMMOND STREET TOWNHOMES
MOISTURE EVALUATION
LOTS 4 THROUGH 6
APRIL 30, 2015
Boring No. Sample Moisture Hand Free Final Moisture
Depth (ft) Content (%) Penetrometer Swell Content After
(tsf) (%) Swell (%)
0-1 40 0.00
1-2 28 0.25
2-3 39 0.00
3-4 34 0.50 0.0 34
4-5 38 0.00
B- 3R 5-6 37 0.00
6-7 39 1.25 0.0 36
7-8 37 1.00
8-9 35 2.25
9-10 26 3.00 1.2 27
10-11 33 1.25
11-12 21 4.25
0-1 22 1.25
1-2 29 2.25 0.9 30
2-3 28 2.00
3-4 26 2.25
4-5 29 2.25
B-10 5-6 20 2.25
6-7 24 4.50 2.3 27
7-8 21 4.5+
8-9 23 4.5+
9-10 22 4.5+
10-11 20 4.5+ 2.7 22
11-12 21 4.50
0-1 25 2.50
1-2 26 3.00 1.8 27
2-3 26 1.25
3-4 27 2.00
4-5 29 2.00
B-11 5-6 28 3.00 1.1 29
6-7 28 2.25
7-8 25 3.25
8-9 24 3.75
9-10 22 4.50 2.2 24
10-11 23 3.50
11-12 21 3.75