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Duke Lesley 1A-LR080206 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.: 311788 Project No.: 0713408 Date of Service: 01/28/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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: ':>otter Concrete Plant: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 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.: 7753 Placement Date: 01/28/2008 Weather Conditions: Clear Time Sampled: 03:20am Temperature - Air: 470F Truck No: 136 Air Content: 5.5% Overall Placement Location: (Paving) South side loading parking spaces Sample Location: Grid line L/35.7, 90' south REPORT OF TESTS Batch time: 02:54am Concrete: 580F Ticket No: 18794 Unit Weight (pet): NA Measured Slump (inches) 5.75 Cylinder Marked Date Set No. Tested 1 1 02/04/2008 1 2 02/25/2008 1 3 02/25/2008 4 03/24/2008 Age (days) 7 Diameter (in) 6.00 28 28 56 ~E3 ~~ ffij Q DO D Type 1 Type 2 Type 3 Type 4 Type 5 Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 108,700 Area (in') 28.27 Type 6 Compressive Strength (psi) 3,840 Fracture Type Type2 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. (CHIKW) Page 1 of 11 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.: 311788 Project No.: 0713408 Date of Service: 01/28/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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 D.\TA Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 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.: 7753 Placement Date: 01/28/2008 Weather Conditions: Clear Time Sampled: 04:15am Temperature - Air: 450F Truck No: 136 Air Content: 5.0% Overall Placement Location: (Paving) South side loading parking spaces Sample Location: Grid line U34.3, 70' south REPORT OF TESTS Batch time: 04:12am Concrete: 570F Ticket No: 18808 Unit Weight (pcf): NA Measured Slump (inches) 5.5 Cylinder Marked Date Set No. Tested 2 1 02/04/2008 2 2 02/25/2008 2 3 02/25/2008 2 4 03/24/2008 Age (days) 7 Diameter (in) 6.00 28 28 56 ~EJ ~[g ffij tJ DO D Type 1 Type 2 Type 3 Type 4 Type 5 Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 122,120 Area (in2) 28.27 Type 6 Compressive Strength (psi) 4,320 Fracture Type Type5 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. (CHIKW) Page 2 of 11 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.: 311788 Project No.: 0713408 Date of Service: 01/28/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 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.: 7753 pl,cement Date: 01/28/2008 Weather Conditions: Clear, windy Time Sampled: 05:24am Batch time: 05:04am Temperature - Air: 470F Concrete: 530F Truck No: 109 Ticket No: 18820 Air Content: 5.5% Unit Weight (pet): NA Overall Placement Location: (Paving) South side loading parking spaces Measured Slump (inches) 5.0 Sample Location: Grid line U33.3, 50' south REPORT OF TESTS Cylinder Marked Date Set No. Tested 3 1 02/04/2008 3 2 02/25/2008 3 3 02/25/2008 3 4 03/24/2008 Age (days) 7 Diameter (in) 6.00 28 28 56 ~~ ~~ ~ E] DO D Type 1 Type 2 Type 3 Type 4 Type 5 Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 126,690 Compressive Strength (psi) 4,480 Fracture Type Type5 Area (in') 28.27 Type 6 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 11 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.: 311788 Project No.: 0713408 Date of Service: 01/28/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 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.: 7753 Placement Date: 01/28/2008 Weather Conditions: Clear, windy Time Sampled: 07: 15am Batch time: 05:54am Temperature - Air: 500F Concrete: 570F Truck No: 109 Ticket No: 18831 Air Content: 5.0% Unit Weight (pcf): NA Overall Placement Location: (Paving) South side loading parking spaces Measured Slump (inches) 5.75 Sample Location: Grid line L/31.9, 30' south REPORT OF TESTS Cylinder Marked Date Set No. Tested 4 1 02/04/2008 4 2 02/25/2008 4 3 02/25/2008 4 4 03/24/2008 Age (days) 7 Diameter (in) 6.00 28 28 56 ~rJ ~[g fJ] [SJ DO D Type 1 Type 2 Type 3 Type 4 Type 5 Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 120,070 Compressive Strength (psi) 4,250 Fracture Type Type5 Area (in2) 28.27 Type 6 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 of 11 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.: 311788 Project No.: 0713408 Date of Service: 01/28/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 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.: 7753 Placement Date: 01/28/2008 Weather Conditions: Mostly cloudy Time Sampled: 08:15am Batch time: 07:47am Temperature - Air: 520F Concrete: 530F Truck No: 128 Ticket No: 18848 Air Content: 5.8% Unit Weight (pcf): NA Overall Placement Location: (Paving) South side loading parking spaces Measured Slump (inches) 5.75 Sample Location: Grid line L/30.5, 25' south REPORT OF TESTS Cylinder Marked Date Set No. Tested 5 1 02/04/2008 5 2 02/25/2008 5 3 02/25/2008 5 4 03/24/2008 Age (days) 7 Diameter (in) 6.00 28 28 56 ~E3 ~Q;] 5I] t] DO D Type 1 Type 2 Type 3 Type 4 Type 5 Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 111,700 Compressive Strength (psi) 3,950 Fracture Type Type6 Area (in') 28.27 Type 6 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 11 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, 8te 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 311788 Project No.: 0713408 Date of Service: 01/28/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 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.: 7753 Placement Date: 01/28/2008 Weather Conditions: Mostly cloudy Time Sampled: 09:15am Batch time: 08:51am Temperature. Air: 530F Concrete: 550F Truck No: 104 Ticket No: 18859 Air Content: 5.7% Unit Weight (pcf): NA Overall Placement Location: (Paving) South side loading parking spaces Measured Slump (inches) 5.25 Sample Location: Grid line L/29.1, 45' south REPORT OF TESTS Cylinder Marked Date Set No. Tested 6 1 02/04/2008 6 2 02/25/2008 6 3 02/25/2008 6 4 03/24/2008 Age (days) 7 Diameter (in) 6.00 28 28 56 ~E3 ~QJ ill] ~ DO D Type 1 Type 2 Type 3 Type 4 Type 5 Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 109,110 Compressive Strength (psi) 3,860 Fracture Type Type5 Area (in') 28.27 Type 6 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. (CHIKW) Page 7 of 11 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.: 311788 Project No.: 0713408 Date of Service: 01/28/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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 SuppJi1r: Potter Concrete Plant: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 6% Test Method: ASTM C-172 ASTM C-31 (except 10.1.2) ASTM C-143 ASTM C-231 ASTM C-1 064 ASTM C-138 ASTM C-39 PROJECT DATA Mix Design 1.0.: 7753 Placement Date: 01/28/2008 Weather Conditions: Mostly cloudy Time Sampled: 11 :OOam Batch time: 10:32am Temperature - Air: 570F Concrete: 560F Truck No: 136 Ticket No: 18872 Air Content: 5.3% Unit Weight (pct): NA Overall Placement Location: (Paving) South side loading parking spaces Measured Slump (inches) 5.75 Sample Location: Grid line L/28.5, 85' south 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 7 1 02/04/2008 7 6.00 28.27 110,910 3,920 Type2 7 2 02/25/2008 28 7 3 02/25/2008 28 7 4 03/24/2008 56 ~EJ ~l9 ~ tJ DO D Type 1 Type 2 Type 3 Type 4 Type 5 Type 6 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 11 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.: 311788 Project No.: 0713408 Date of Service: 01/28/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 6% Test Method: ASTM C-172 ASTM C-31 (except 10.1.2) ASTM C-143 ASTM C-231 ASTM C-1 064 ASTM C-138 ASTM C-39 Mix Design 1.0.: 7753 Placement Date: 01/28/2008 Weather Conditions: Clear Time Sampled: 11 :45am Temperature - Air: 580F Truck No: 104 Air Content: 5.5% Overall Placement Location: (Paving) South side loading parking spaces Measured Slump (inches) 5.5 Batch time: 11 :23am Concrete: 510F Ticket No: 18881 Unit Weight (pet): NA Sample Location: Grid line U27.3, 37' south 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 8 1 02/04/2008 7 6.00 28.27 108,260 3,830 Type6 8 2 02/25/2008 28 8 3 02/25/2008 28 8 4 03/24/2008 56 ~EJ ~lIJ [ill] E;J DO D Type 1 Type 2 Type 3 Type 4 Type 5 Type 6 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 10 of 11 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.: 311915 Project No.: 0713408 Date ot Service: 01/29/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 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.: 7753 o:)lacement Date: 01/29/2008 Weather Conditions: Clear Time Sampled: 03:20am Temperature - Air: Truck No: 120 Air Content: 5.6% Overall Placement Location: (Paving) Driveway parking spaces west side of building Measured Slump (inches) 5.0 Batch time: 02:59am Concrete: Ticket No: 10263 Unit Weight (pet): NA Sample Location: 40' south, 40' west from grid line L 1 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 02/05/2008 7 6.00 28.27 160,400 5,670 Type2 2 02/26/2008 28 3 02/26/2008 28 1 4 03/25/2008 56 ~~ ~Q;l rnJ ~ DO D Type 1 Type 2 Type 3 Type 4 Type 5 Type 6 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 8 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.: 311915 Project No.: 0713408 Date of Service: 01/29/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 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.: 7753 Placement Date: 01/29/2008 Weather Conditions: Clear Time Sampled: 04:15am Temperature - Air: Truck No: 109 Air Content: 6.0% Overall Placement Location: (Paving) Driveway parking spaces west side of building Measured Slump (inch ~s) 6.0 Batch time: 03:45am Concrete: Ticket No: 10270 Unit Weight (pcf): NA Sample Location: 40' west from grid line 1-1 REPORT OF TESTS Cylinder Marked Date Set No. Tested 2 1 02/05/2008 2 2 02/26/2008 2 3 02/26/2008 2 4 03/25/2008 Age (days) 7 Diameter (in) 6.00 28 28 56 [2j~ ~Q] [}ru t] DO D Type 1 Type 2 Type 3 Type 4 Type 5 Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 99,700 Compressive Strength (psi) 3,530 Fracture Type Type3 Area (in2) 28.27 Type 6 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 of 8 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.: 311915 Project No.: 0713408 Date of Service: 01/29/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 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.: 7753 Placement Date: 01/29/2008 Weather Conditions: Clear Time Sampled: 06:30am Temperature - Air: 660F Truck No: 109 Air Content: 5.0% Overall Placement Location: (Paving) Driveway parking spaces west side of building Measured Slump (inches) 5.75 Batch time: 06:06am Concrete: 530F Ticket No: 10283 Unit Weight (pcf): NA Sample Location: 30' west from grid line F.1 REPORT OF TESTS Cylinder Marked Set No. - - 3 1 Age (days) 7 Diameter (in) 6.00 Date Tested 02/05/2008 3 2 02/26/2008 28 3 3 02/26/2008 28 3 4 03/25/2008 56 ~rJ ~Q] ~ bJ DO D ~ , Type 1 Type 2 Type 3 Type 4 Type 5 Type 6 Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 99,460 Compressive Strength (psi) 3,520 Fracture Type Type6 Area (in') 28.27 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 8 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.: 311915 Project No.: 0713408 Date of Service: 01/29/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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: On site Specification Req uirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 6% Test Method: ASTM C-172 ASTM C-31 (except 10.1.2) ASTM C-143 ASTM C-231 ASTM C-1 064 ASTM C-138 ASTM C-39 PROJfCT DATA Mix Design 1.0.: 7753 Placement Date: 01/29/2008 Weather Conditions: Clear Time Sampled: 07:57am Temperature - Air: 660F Truck No: 109 Air Content: 4.7% Overall Placement Location: (Paving) Driveway parking spaces west side of building Measured Slump (inches) 5.0 Batch time: 07:37am Concrete: 550F Ticket No: 10297 Unit Weight (pet): NA Sample Location: 35' west from grid line B.1 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 4 1 02/05/2008 7 6.00 28.27 104,430 3,690 Type3 4 2 02/26/2008 28 4 3 02/26/2008 28 4 4 03/25/2008 56 ~EJ [@][g ~ E;J DO D Type 1 Type 2 Type 3 Type 4 Type 5 Type 6 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 8 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 500, Houston, TX 77040 4421 Freidrich, Ste 195, Austin, TX 78744 Corporate Phone: (214) 530-9745 Report of Concrete Compressive Strength Test Report No.: 311915 Project No.: 0713408 Date of Service: 01/29/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 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.: 7753 Placement Date: 01/29/2008 Weather Conditions: Mostly cloudy, windy Time Sampled: 09:45am Batch time: 09:47am Temperature - Air: 670F Concrete: 620F Truck No: 140 Ticket No: 10309 Air Content: 5.5% Unit Weight (pcf): NA Overall Placement Location: (Paving) Driveway parking spaces west side of building Measured Slump (inches) 4.75 Sample Location: 50' west from grid line A.1 REPORT OF TESTS Cylinder Marked Date Set No. Tested 5 1 02105/2008 5 2 02/26/2008 5 3 02/26/2008 5 4 03/25/2008 Age (days) 7 Diameter (in) 5.99 28 28 56 0Ej ~Q] rnJ LJ DO D Type 1 Type 2 Type 3 Type 4 Type 5 Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 120,730 Compressive Strength (psi) 4,280 Fracture Type Type3 Area (in') 28.18 Type 6 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 of 8 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.: 311915 Project No.: 0713408 Date of Service: 01/29/2008 Report Date: 02/06/2008 Project: Point West VI Coppell, Texas 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: On site Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 4" - 6" Air (%): 4% - 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.: 7753 Placement Date: 01/29/2008 Weather Conditions: Sunny, windy Time Sampled: 12:30pm Batch time: 11:51am Temperature - Air: 680F Concrete: 650F Truck No: 109 Ticket No: 18896 Air Content: 5.6% Unit Weight (pet): NA Overall Placement Location: (Paving) Driveway parking spaces west side of building Measured Slump (inches) 5.75 Sample Location: 120' north, 120' west from center of approach at A.1 REPORT OF TESTS Cylinder Marked Date Set No. Tested 6 1 02/05/2008 6 2 02/26/2008 6 3 02/26/2008 6 4 03/25/2008 Age (days) 7 Diameter (in) 6.00 28 28 56 ~tJ ~l9 5IE EJ DO 0 Type 1 Type 2 Type 3 Type 4 Type 5 Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 105,930 Compressive Strength (psi) 3,750 Fracture Type Type6 Area (in2) 28.27 Type 6 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 8