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Duke Lesley 3C-LR080104 Rone Engineering . 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.: 304448 Project No.: 0711530 Date of Service: 11/06/2007 Report Date: 01/04/2008 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.): 3" - 5" Air (%):, 3% - 6% 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 Placement Date: 11/06/2007 Weather Conditions: Clear Time Sampled: 04:45am Temperature - Air: 500F Truck No: 132 Air Content: 7.1% Overall Placement Location: West parking Batch time: 04:39am Concrete: 700F Ticket No: 8865 Unit Weight (pcf): NA Measured Slump (inches) 6.0 Sam pie Location: 20' east from northwest corner 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 11/13/2007 7 6.00 28.27 94,460 3,340 Shear 1 2 12/04/2007 28 6.00 28.27 123,500 4,370 Cone/Split 1 3 12/04/2007 28 6.00 28.27 112,760 3,990 Shear Average 4,180 1 4 01/01/2008 56 6.00 28.27 156,120 5,520 Cone/Split 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/KW) Page 1 of 9 Rone Engineering . 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.: 304448 Project No.: 0711530 Date of Service: 11/06/2007 Report Date: 01/04/2008 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive stFength 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.): 3" - 5" Air (%): 3% - 6% 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 1.0.: 7752 Placement Date: 11/06/2007 Weather Conditions: Clear Time Sampled: 05:35am Temperature - Air: 510F Truck No: 107 Air Content: 7.0% Overall Placement Location: West parking Batch time: 05:19am Concrete: 680F Ticket No: 8873 Unit Weight (pcf): NA Measured Slump (inches) 5.0 Sample Location: 75' east from northwest corner 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 2 1 11/13/2007 7 6.00 28.27 119,710 4,230 Cone/Split 2 2 12/04/2007 28 6.00 28.27 149,530 5,290 Cone/Split 2 3 12/04/2007 28 6.00 28.27 147,130 5,200 Cone/Split Average 5,250 2 4 01101/2008 56 6.00 28.27 192,200 6,800 Cone/Split Remarks: Water added at site: 5 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/KW) Page 2 of9 Rone Engineering . 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.: 304448 Project No.: 0711530 Date of Service: 11/06/2007 Report Date: 01/04/2008 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.): 3" - 5" Air (%): 3% - 6% 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 Placement Date: 11/06/2007 Weather Conditions: Sunny Time Sampled: 07:30am Temperature - Air: 510F Truck No: 132 Air Content: 6.2% Overall Placement Location: West parking Batch time: 06:47am Concrete: 680F Ticket No: 8885 Unit Weight (pet): NA Measured Slump (inches) 5.0 Sample Location: 15' east, 100' from northwest corner 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 11/13/2007 7 6.00 28.27 104,160 3,680 Cone/Split 3 2 12/04/2007 28 6.00 28.27 125,740 4,450 Shear 3 3 12/04/2007 28 6.00 28.27 120,340 4,260 Cone/Split Average 4,350 3 4 01/01/2008 56 6.00 28.27 138,260 4,890 Cone/Split 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/KW) Page 3 of 9 Rone Engineering . 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.: 304448 Project No.: 0711530 Date of Service: 11/06/2007 Report Date: 01/04/2008 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.): 3" - 5" Air (%): 3% - 6% 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 Placement Date: 11/06/2007 Weather Conditions: Sunny Time Sampled: 07:55am Temperature - Air: 510F Truck No: 106 Air Content: 6.3% Overall Placement Location: West parking Measured Slump (inches) 5.5 Batch time: 07:47am Concrete: 680F Ticket No: 8892 Unit Weight (pcf): NA Sample Location: 10' east, 125' from northwest corner 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 11/13/2007 7 6.00 28.27 96,400 3,410 Cone/Split 4 2 12/04/2007 28 6.00 28.27 127,440 4,510 Cone/Split 4 3 12/04/2007 28 6.00 28.27 123,330 4,360 Shear Average 4,430 4 4 01/01/2008 56 6.00 28.27 144,210 5,100 Cone/Split 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/KW) Page 4 of 9 Rone Engineering . 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.: 304448 Project No.: 0711530 Date of Service: 11/06/2007 Report Date: 01/04/2008 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.): 3" - 5" Air (%): 3% - 6% 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 Placement Date: 11/06/2007 Weather Conditions: Sunny Time Sampled: 09:13am Temperature - Air: 540F Truck No: 107 Air Content: 6.0% Overall Placement Location: West parking Measured Slump (inches) 5.0 Batch time: 09:07am Concrete: 710F Ticket No: 8905 Unit Weight (pet): NA Sample Location: 30' east, 125' from northwest corner 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 5 1 11/13/2007 7 6.00 28.27 101,440 3,590 Shear 5 2 12/04/2007 28 6.00 28.27 130,600 4,620 Shear 5 3 12/04/2007 28 6.00 28.27 123,960 4,380 Shear Average 4,500 5 4 01/01/2008 56 6.00 28.27 173,810 6,150 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/KW) Page 5 of9 Rone Engineering . 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.: 304448 Project No.: 0711530 Date of Service: 11/06/2007 Report Date: 01/04/2008 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.): 3" - 5" Air (%): 3% - 6% 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 Placement Date: 11/06/2007 Weather Conditions: Sunny Time Sampled: 11 :OOam Temperature - Air: 590F Truck No: 141 Air Content: 4.7% Overall Placement Location: West parking Measured Slump (inches) 5.0 Batch time: 10:41 am Concrete: 710F Ticket No: 8917 Unit Weight (pet): NA Sample Location: 20' east, 150' from northwest corner 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 6 1 11/13/2007 7 6.00 28.27 108,720 3,850 Cone/Split 6 2 12/04/2007 28 6.00 28.27 146,440 5,180 Cone/Split 6 3 12/04/2007 28 6.00 28.27 134,230 4,750 Shear Average 4,960 6 4 01/01/2008 56 6.00 28.27 174,160 6,160 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/KW) Page 6 of 9 Rone Engineering . Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 770.1 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.: 304448 Project No.: 0711530 Date of Service: 11/06/2007 Report Date: 01/04/2008 Project: Point West Office I Services: Obtain samples of fresh concrete at the placementlocalions, 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.): 3" - 5" Air (%): 3% - 6% 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 Placement Date: 11/06/2007 Weather Conditions: Sunny Time Sampled: 12:03pm Temperature - Air: 590F Truck No: 144 Air Content: 6.2% Overall Placement Location: West parking Batch time: 11 :59am Concrete: 690F Ticket No: 8930 Unit Weight (pet): NA Measured Slump (inches) 5.0 Sample Location: 35' east, 120' from northwest corner 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 7 1 11/13/2007 7 6.00 28.27 125,760 4,450 Cone/Split 7 2 12/04/2007 28 6.00 28.27 131,530 4,650 Cone/Split 7 3 12/04/2007 28 6.00 28.27 148,340 5,250 Shear Average 4,950 7 4 01/01/2008 56 6.00 28.27 173,500 6,140 Shear 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/KW) Page 7 of 9 Rone Engineering . 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.: 304448 Project No.: 0711530 Date of Service: 11/06/2007 Report Date: 01/04/2008 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.): 3" - 5" Air (%): 3% - 6% 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 Placement Date: 11/06/2007 Weather Conditions: Sunny Time Sampled: 12:40pm Temperature - Air: 590F Truck No: 106 Air Content: 6.0% Overall Placement Location: West parking Measured Slump (inches) 5.5 Batch time: 12:31pm Concrete: 680F Ticket No: 8936 Unit Weight (pcf): NA Sample Location: 25' east, 130' from northwest corner 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) (inZ) (Ibs) (psi) Type 8 1 11/13/2007 7 6.00 28.27 86,590 3,060 Cone/Split 8 2 12/04/2007 28 6.00 28.27 105,280 3,720 Shear 8 3 12/04/2007 28 6.00 28.27 116,010 4,100 Shear Average 3,910 * 8 4 01/01/2008 56 6.00 28.27 135,550 4,790 Shear * Does not comply with specified strength 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/KW) Page 8 of 9 Rone Engineering . 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.: 304448 Project No.: 0711530 Date of Service: 11/06/2007 Report Date: 01/04/2008 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.): 3" - 5" Air (%): 3% - 6% 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 Placement Date: 11/06/2007 Weather Conditions: Sunny Time Sampled: 01 :45pm Temperature - Air: 590F Truck No: 132 Air Content: 6.1 % Overall Placement Location: West parking Measured Slump (inches) 5.0 Batch time: 01 :28pm Concrete: 700F Ticket No: 8945 Unit Weight (pet): NA Sample Location: 25' east, 120' from northwest corner 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 9 1 11/13/2007 7 6.00 28.27 93,050 3,290 Shear 9 2 12/04/2007 28 6.00 28.27 117,980 4,170 Cone/Split 9 3 12/04/2007 28 6.00 28.27 101,590 3,590 Shear Average 3,880 * 9 4 01/01/2008 56 6.00 28.27 129,910 4,590 Shear * Does not comply with specified strength Technician: David Best Started: 03:30am Report Distribution: Orig: Duke Construction, LP (Dallas, TX) Attn: Mr. Paul Byrne (1-ec copy) 1-cc City of Coppell Attn: Mr. Lee Stone 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 Remarks: Water added at site: 10 gallons Finished: 05:15pm Rone Engineering ~~ J 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/KW) Page 9 of 9