Amberpoint BP-LR020206February 6, 2002
i(N(iINEF~RING. INC
Transwestern Commercial Services
5001 Spring Valley Road, Suite 600W
Dallas, Texas 75244
Att n~~ ~ v~'~'~' d ~
R,~ Moisture Evaluation No. 1
f Amberpoint Building No. 1
/ Coppell, Texas ~
L HB~029.0038
Gentlemen:
HBC Engineering (HBC) has completed its first evaluation of moisture levels achieved by water
pressure injection at the above referenced site. This evaluation was performed at the northeast
portion of the Building No. 1 pad. The building pad was injected with four passes with water prior to
this evaluation.
A total of 6 borings were drilled at the site on February 4, 2002. Each boring was continuously
sampled to a depth of about 8 feet with steel tubes. The samples were extruded, logged, sealed and
packaged at the site for transportation to the laboratory. In the laboratory, moisture content and hand
penetrometer readings were determined on one foot intervals.
A diagram depicting the boring locations is attached. Laboratory data is provided on the attached
Summary of Laboratory Tests.
Review of moisture content determinations and hand penetrometer tests indicate that the moisture
levels are generally several percentage points below the desired levels with some intervals in some
borings near the desired levels. Therefore, HBC recommends that this portion of the slab be injected
by two additional injections using water and surfactant. Additional moisture evaluations will be
required once the additional passes with water are completed.
Mr. Jim Gaspard
Transwestern Commercial Services
February 6, 2002
Page 2
Please contact us if there are any questions concerning the test results or recommendations.
Sincerely,
HBC ENGINEERING
~.zfwell, P.E.
Project Engineer
O'Brien & Associates / Richard Nordyke (1)
TechniStructures, inc. / Keith Leslie (1)
City of Coppell - Const. Insp. / Larry Davis (1)
City of Coppell - Bldg. Insp. / Lee Stone (1)
Hill & Wilkinson, Ltd. / Bryan Diagle/Kirk Woltman (1)
Halff Associates / Jaime Beard/Travis Markham (1)
State Farm Insurance / Bill Rogalski (1)
SANDY LAKE ROAD
.........
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BORING LOCATION DIAGRAM
M~ST~E EVALUATI~ No. ~
~ AMBE~RI~ BU~ NO. 1
COPPELL, ~XAS
Proje=t No., 94018270 Date, 01/80/02
MOISTURE EVALUATION NO. 1
SUMMARY OF LABORATORY TESTS
PROJECT NAME: Amberpoint Building No. 1
Coppell, Texas
PROJECT NO.: 94021029,0038 DATE: 02/00/02
Boring Depth Percent Hand
Number I feet) Moisture Penetrometer
1 O-t 24 3.25
1-2 23 2.50
2-3 19 4.5+
3-4 24 3.30
4-5 21 4.5+
5-6 24 4.00
6-7 21 4.5+
7-8 22 4.5+
2 0-1 24 1.50
1-2 17 4.5+
2 3 16 4.5+
3-4 18 4.5+
4-5 21 4.5+
5-6 20 4.5+
6-7 16 4.5+
3 0-1 23 4.00
1-2 22 3.25
2-3 18 4.5+
3-4 24 2.25
4-5 22 4.00
5 6 23 3.75
6-7 15 4,5+
7-8 16 4.5+
4 0-1 21 1.25
1-2 27 2.00
2-3 24 2.00
3-4 21 3.75
4-5 19 4.25
5-6 20 4.5+
6-7 20 4.5+
7-8 18 4.5+
5 0-1 22 2.25
1-2 22 3.25
2-3 19 4.5+
3-4 20 4.5+
4-5 21 4.5+
5-6 22 4.5+
6-7 21 4.5+
7-8 20 4.5+
6 0-1 28 1.25
1-2 26 1.50
2-3 24 4.5+
3-4 18 4.5+
4-5 19 4.5+
5-6 24 4.50
6-7 21 4.25
7-8 20 4.5+