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Duke Lesley 3C-LR071106 Rone En~== Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7701 W Little York, Ste 600, Houston, TX 77040 4421 Freidrich, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 11/06/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. PROJECT DATA REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Cylinder Maximum Compressive Marked Date Age Diameter Area Load Strength Set No. Tested (days) (in) (in') (Ibs) (psi) 7 1 09/15/2007 7 6.00 28.27 82,570 2,920 7 2 10/06/2007 28 6.00 28.27 93,950 3,320 7 3 10/06/2007 28 6.00 28.27 100,700 3,560 Average 3,440 * 7 4 11/03/2007 56 6.00 28.27 110,030 3,890 Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 3% - 5% Test Method: ASTM C-172 ASTM C-31 (except 10.1.2) ASTM C-143 ASTM C-231 ASTM C-1064 ASTM C-138 ASTM C-39 Mix Design 1.0.: 7752 PW Placement Date: 09/08/2007 Weather Conditions: Clear Time Sampled: 11: 1 Oam Temperature - Air: 850F Truck No: 137 Air Content: 4.5% Overall Placement Location: Paving at Point West 1, building 1 - southern half of east parking Measured Slump (inches) 5.0 Batch time: 1 0:42am Concrete: 950F Ticket No: 7387 Unit Weight (pet): NA Sample Location: 240' north, 75' west from southeast corner of paving Fracture Type Shear Shear Cone/Split Cone/Split * Does not comply with specified strength Remarks: Water added at site: 10 gallons Started: 02:00am Finished: 01 :45pm Technician: Montreal Bailey Report Distribution: Orig: Duke Construction, LP (Dallas, TX) Attn: Mr. Paul Byrne (1-ec copy) 1-cc Potter Concrete Attn: Mr. Ryan Skelly 1-cc City of Coppell Attn: Mr. Lee Stone 1-cc City of Coppell Attn: Mr. Larry Davis Rone Engineering pad ~ K. Scott Watson, AET Project Manager LIMITATIONS: The test results presented herein were prepared based upon the specific samples provided for testing. We assume no responsibility for variation in quality (composition, appearance, etc.) or any other feature of similar subject matter provided by persons or conditions over which we have no control. Our letters and reports are for the exclusive use of the clients to whom they are addressed and shall not be reproduced except in full without the written approval of Rone Engineering Services, Ltd. (CH/ED) Page 7 of 7 Rone En~== Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7701 W Little York, Ste 600, Houston, TX 77040 4421 Freidrich, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 11/06/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. PROJECT DATA Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 3% - 5% Test Method: ASTM C-172 ASTM C-31 (except 10.1.2) ASTM C-143 ASTM C-231 ASTM C-1064 ASTM C-138 ASTM C-39 Mix Design I.D.: 7752 PW Placement Date: 09/08/2007 Weather Conditions: Sunny, clear Time Sampled: 10:30am Batch time: 10:09am Temperature - Air: 850F Concrete: 920F Truck No: 108 Ticket No: 7381 Air Content: 4.5% Unit Weight (pet): NA Overall Placement Location: Paving at Point West 1, building 1 - southern half of east parking Measured Slump (inches) 5.0 Sample Location: 200' north, 125' west from southeast corner of paving REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Cylinder Maximum Compressive Marked Date Age Diameter Area Load Strength Fracture Set No. Tested (days) (in) (in") (Ibs) (psi) Type 6 1 09/15/2007 7 6.00 28.27 83,530 2,950 Shear 6 2 10/06/2007 28 6.00 28.27 103,480 3,660 Shear 6 3 10/06/2007 28 6.00 28.27 107,780 3,810 Cone/Split Average 3,740 * 6 4 11/03/2007 56 6.00 28.27 117,830 4,170 Shear * Does not comply with specified strength Remarks: Water added at site: 10 gallons LIMITATIONS: The test results presented herein were prepared based upon the specific samples provided for testing. We assume no responsibility for variation in quality (composition, appearance, etc.) or any other feature of similar subject matter provided by persons or conditions over which we have no control. Our letters and reports are for the exclusive use of the clients to whom they are addressed and shall not be reproduced except in full without the written approval of Rone Engineering Services, Ltd. (CH/ED) Page 6 of 7 Rone En~~ Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7701 W Little York, Ste 600, Houston, TX 77040 4421 Freidrich, Ste 195, Austin, TX 78744 Corporate Phone: (214)630-9745 Report of Concrete Compressive Strength Test Report No.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 11/06/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 3% - 5% Test Method: ASTM C-172 ASTM C-31 (except 10.1.2) ASTM C-143 ASTM C-231 ASTM C-1064 ASTM C-138 ASTM C-39 PROJECT DATA Mix Design I.D.: 7752 PW Placement Date: 09/08/2007 Weather Conditions: Sunny, clear Time Sampled: 08:15am Batch time: 07:57am Temperature - Air: 850F Concrete: 920F Truck No: 108 Ticket No: 7364 Air Content: 4.8% Unit Weight (pet): NA Overall Placement Location: Paving at Point West 1, building 1 - southern half of east parking Measured Slump (inches) 5.25 Sample Location: 150' north, 100' west from southeast corner of paving REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Cylinder Maximum Compressive Marked Date Age Diameter Area Load Strength Fracture Set No. Tested (days) (in) (in2) (Ibs) (psi) Type 5 1 09/15/2007 7 6.00 28.27 80,190 2,840 Cone/Split 5 2 10/06/2007 28 6.00 28.27 108,250 3,830 Cone/Split 5 3 10/06/2007 28 6.00 28.27 102,950 A.~~ Cone/Split Average 5 4 11/03/2007 56 6.00 28.27 116,740 Cone/Split , * Does not comply with specified strength Remarks: Water added at site: 10 gallons LIMITATIONS: The test results presented herein were prepared based upon the specific samples provided for testing. We assume no responsibility for variation in quality (composition, appearance, etc.) or any other feature of similar subject matter provided by persons or conditions over which we have no control. Our letters and reports are for the exclusive use of the clients to whom they are addressed and shall not be reproduced except in full without the written approval of Rone Engineering Services, Ltd. (CH/ED) Page 5 of 7 Rone Eni== Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7701 W Little York, 8te 600, Houston, TX 77040 4421 Freidrich, 8te 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 11/06/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. PROJECT DATA Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 3% - 5% Test Method: ASTM C-172 ASTM C-31 (except 10.1.2) ASTM C-143 ASTM C-231 ASTM C-1064 ASTM C-138 ASTM C-39 Mix Design 1.0.: 7752 PW Placement Date: 09/08/2007 Weather Conditions: Clear Time Sampled: 07: 15am Temperature - Air: 800F Truck No: 135 Air Content: 4.8% Overall Placement Location: Paving at Point West 1, building 1 - southem half of east parking Measured Slump (inches) 6.5 Batch time: 06:52am Concrete: 880F Ticket No: 7355 Unit Weight (pet): NA Sample Location: 110' north, 50' west from northeast corner of paving REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Cylinder Maximum Compressive Marked Date Age Diameter Area Load Strength Fracture Set No. Tested (days) (in) (in') (Ibs) (psi) Type 4 1 09/15/2007 7 6.00 28.27 91,230 3,230 Shear 4 2 10/06/2007 28 6.00 28.27 116,720 4,130 Shear 4 3 10/06/2007 28 6.00 28.27 114,500 4,050 Cone/Split Average 4,090 4 4 11/03/2007 56 6.00 28.27 125,410 4,440 Shear LIMITATIONS: The test results presented herein were prepared based upon the specific samples provided for testing. We assume no responsibility for variation in Quality (composition, appearance, etc.) or any other feature of similar subject matter provided by persons or conditions over which we have no control. Our letters and reports are for the exclusive use of the clients to whom they are addressed and shall not be reproduced except in full without the written approval of Rone Engineering Services, Ltd. (CH/ED) Page 4 of 7 Rone Eni== Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7701 W Little York, 8te 600, Houston, TX 77040 4421 Freidrich, 8te 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 11/06/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. PROJECT DATA Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 3% - 5% Test Method: ASTM C-172 ASTM C-31 (except 10.1.2) ASTM C-143 ASTM C-231 ASTM C-1064 ASTM C-138 ASTM C-39 Mix Design 1.0.: 7752 PW Placement Date: 09/08/2007 Weather Conditions: Clear Time Sampled: 05:20am Temperature - Air: 790F Truck No: 108 Air Content: 4.3% Overall Placement Location: Paving at Point West 1, building 1 - southern half of east parking Measured Slump (inches) 6.0 Batch time: 05:03am Concrete: 860F Ticket No: 7345 Unit Weight (pet): NA Sample Location: 65' north, 100' west from southeast corner of paving REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Cylinder Maximum Compressive Marked Date Age Diameter Area Load Strength Fracture Set No. Tested (days) (in) (in') (Ibs) (psi) Type 3 1 09/15/2007 7 6.00 28.27 88,740 3,140 Cone/Split 3 2 10/06/2007 28 6.00 28.27 116,120 4,110 Shear 3 3 10/06/2007 28 6.00 28.27 116,130 4,110 Cone/Split Average 4,110 3 4 11/03/2007 56 6.00 28.27 118,610 4,190 Shear LIMITATIONS: The test results presented herein were prepared based upon the specific samples provided for testing. We assume no responsibility for variation in quality (composition, appearance, etc.) or any other feature of similar subject matter provided by persons or conditions over which we have no control. Our letters and reports are for the exclusive use of the clients to whom they are addressed and shall not be reproduced except in full without the written approval of Rone Engineering Services, Ltd. (CH/ED) Page 3 of 7 Rone En~~ Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7701 W Little York, 8te 600, Houston, TX 77040 4421 Freidrich, 8te 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 11/06/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. PROJECT DATA Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 3% - 5% Test Method: ASTM C-172 ASTM C-31 (except 10.1.2) ASTM C-143 ASTM C-231 ASTM C-1064 ASTM C-138 ASTM C-39 Mix Design I.D.: 7752 PW Placement Date: 09/08/2007 Weather Conditions: Clear Time Sampled: 04:40am Temperature - Air: 790F Truck No: 144 Air Content: 4.0% Overall Placement Location: Paving at Point West 1, building 1 - southern half of east parking Measured Slump (inches) 4.0 Batch time: 04:21 am Concrete: 860F Ticket No: 7337 Unit Weight (pet): NA Sample Location: 30' north, 25' west from southeast corner of paving REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Cylinder Maximum Compressive Marked Date Age Diameter Area Load Strength Fracture Set No. Tested (days) (in) (in") (Ibs) (psi) Type 2 1 09/15/2007 7 6.00 28.27 132,780 4,700 Cone/Split 2 2 10/06/2007 28 6.00 28.27 163,580 5,790 Shear 2 3 10/06/2007 28 6.00 28.27 169,960 6,010 Cone/Split Average 5,900 2 4 11/03/2007 56 6.00 28.27 182,600 6,460 Shear LIMITATIONS: The test results presented herein were prepared based upon the specific samples provided for testing. We assume no responsibility for variation in quality (composition, appearance, etc.) or any other feature of similar subject matter provided by persons or conditions over which we have no control. Our letters and reports are for the exclusive use of the clients to whom they are addressed and shall not be reproduced except in full without the written approval of Rone Engineering Services, Ltd. (CH/ED) Page 2 of 7 Rone Eni~ Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7701 W Little York, Ste 600, Houston, TX 77040 4421 Freidrich, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 11/06/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. PROJECT DATA REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Cylinder Maximum Compressive Marked Date Age Diameter Area Load Strength Fracture Set No. Tested (days) (in) (in') (Ibs) (psi) Type 1 1 09/15/2007 7 6.00 28.27 140,000 4,950 Cone/Shear 1 2 10/06/2007 28 6.00 28.27 183,740 Cone/Split 1 3 10/06/2007 28 6.00 28.27 180,770 Cone/Split Average 1 4 11/03/2007 56 6.00 28.27 197,010 Cone/Split Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 3% - 5% Test Method: ASTM C-172 ASTM C-31 (except 10.1.2) ASTM C-143 ASTM C-231 ASTM C-1064 ASTM C-138 ASTM C-39 Mix Design 1.0.: 7752 PW Placement Date: 09/08/2007 Weather Conditions: Clear Time Sampled: 03:30am Temperature - Air: 790F Truck No: 142 Air Content: 4.1 % Overall Placement Location: Paving at Point West 1, building 1 - southem half of east parking Measu red Slump (inches) 4.5 Batch time: 02:55am Concrete: 860F Ticket No: 7325 Unit Weight (pet): NA Sample Location: 15' north, 10' west from southeast corner of paving LIMITATIONS: The test results presented herein were prepared based upon the specific samples provided for testing. We assume no responsibility for variation in quality (composition, appearance, etc.) or any other feature of similar subject matter provided by persons or conditions over which we have no control. Our letters and reports are for the exclusive use of the clients to whom they are addressed and shall not be reproduced except in full without the written approval of Rone Engineering Services, Ltd. (CH/ED) Page 1 of 7