PA9901-LR000310 ENVIRONMENTAL, 'TECHNICAL AND CONSTRUCTION M RIALS SERVICES
March 10, 2000
Hisaw & Associates
3116 Callaway Drive, Suite 116
Carrollton, Texas 75006 ENGINEERING, INC.
Attn: Mr. Bill Morgan
a division of 1 Ferracon
Re: Moisture Evaluation No. 2
Wagon Wheel Park
Coppell, Texas
HBC Project No. 94001043
Gentlemen:
HBC Engineering, Inc. (HBC) has completed its second evaluation of moisture levels achieved by
water pressure injection at the above referenced site. The concession area was injected with 2
additional passes of water prior to this evaluation for a total of 6 passes. HBC personnel observed
the injection process on a full -time basis.
A total of 4 borings were drilled on March 8, 2000. Each boring was continuously sampled to a depth
of 10 feet with thin - walled 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.
A review of the moisture content determinations and hand penetrometer tests indicates that the
moisture contents at some intervals are at or near the desired levels; however, most intervals below
a depth of 5 feet are below the desired levels. It is HBC's recommendation that the concession area
receive two additional water injections. Additional laboratory testing will not be required after the
specified water injection process. Select fill should be placed on the building pad as soon as possible
after completion of the water injection to minimize the loss of moisture in the clays prior to placement
of the slab.
Please contact us if there are any questions concerning the test results or recommendations.
Sincerely,
HBC ENGINEERING, INC.
tfl
Bryan S. Moulin
Project Manager
Brian A. P ell, P.E.
Project Engineer
cc: City of Coppell- Engineering Dept. (1)
Houston Dallas Fort Worth Austin Wichita Falls
11555 Clay Road 8901 Carpenter Frwy. 2301 E. Loop 820 North 3913 Todd Lane 3100 Seymour Hwy.
Suite 100 Suite 100 Flagstone Si Loop 820 Suite 312 Suite 105
Houston, TX 77043 Dallas, TX 75247 Fort Worth, TX 76118 Austin, TX 78744 Wichita Falls, TX 76310
(713) 690-8989 (214) 630-1010 (817) 268 -8600 (512) 442-1122
(940) 766 -6092
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APPROXIMATE SCALE
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APPROXIMATE SCALE
NOTE: BORING LOCATIONS ARE APPROXIMATE
BORING LOCATION DIAGRAM
MOISTURE EVALUATION No. 2
WAGON WHEEL PARK
COPPELL, TEXAS
NBC Protect No.. 94001043 Date. 03/09/00
F
MOISTURE EVALUATION NO. 2 ENGINEERING, INC.
SUMMARY OF LABORATORY TESTS
PROJECT NAME: Wagon Wheel Park
Coppell, Texas
PROJECT NO.: 94001043 DATE: 3/9/00
Boring Depth Percent Hand
Number (feet) Moisture Penetrometer
B -1 0 -1 20 2.0
1 -2 20 2.3
2 -3 22 2.0
3 -4 22 2.8
4 -5 21 4.5+
5 -6 20 4.5+
6 -7 20 3.8
7 -8 18 4.5+
8 -9 13 4.5+
9 -10 10 4.5+
B -2 0 -1 23 1.3
1 -2 26 1.5
2 -3 29 1.0
3 -4 23 2.0
4 -5 21 4.5+
5 -6 20 4.5+
6 -7 24 4.5+
7 -8 23 4.5+
8 -9 21 4.5+
9 -10 21 4.5+
B -3 0 -1 18 3.3
1 -2 17 4.5+
2 -3 17 4.5+
3 -4 17 4.5+
4 -5 20 4.5+
5 -6 21 4.5+
6 -7 21 4.5+
7 -8 20 4.3 •
8 -9 21 4.5+
9 -10 19 4.5+
MOISTURE EVALUATION NO. 2 ENGINEER fl LNC.
SUMMARY OF LABORATORY TESTS
PROJECT NAME: Wagon Wheel Park
Coppell, Texas
PROJECT NO.: 94001043 DATE: 3/9/00
Boring Depth Percent Hand
Number (feet) Moisture Penetrometer
B -4 0 -1 18 2.8
1 -2 19 2.8
2 -3 23 1.8
3 -4 23 2.0
4 -5 23 3.3
5 -6 23 2.3
6 -7 23 4.5+
7 -8 24 3.8
8 -9 20 4.5+
9 -10 20 4.5+