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Duke Lesley 2A-LR071116 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.: 299350 Project No.: 0712932 Date of Service: 09/20/2007 Report Date: 11/16/2007 Project: Hemisphere's at Point West 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.): 3" - 5" Air (%): NA 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.: 9349 PW Placement Date: 09/20/2007 Weather Conditions: Cloudy Time Sampled: 04:45am Temperature - Air: 700F Truck No: 117 Air Content: NA Overall Placement Location: J, K, L, I Line 11-21 Batch time: 04:27am Concrete: 900F Ticket No: 13645 Unit Weight (pcf): NA Measured Slump (inches) 6.0 Sample Location: Grid line J, K, L, ( 11-12 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 09/27/2007 7 6.00 28.27 97,250 3,440 Shear 2 10/18/2007 28 6.00 28.27 128,440 4,540 Cone/Split 3 10/18/2007 28 6.00 28.27 140,580 4,970 Cone/Shear Average 4,760 4 11/15/2007 56 6.00 28.27 149,370 5,280 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 lellers 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. (LBIJC) 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 Freldrich, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 299350 Project No.: 0712932 Date of Service: 09/20/2007 Report Date: 11/16/2007 Project: Hemisphere's at Point West 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.): 3" - 5" Air (%): NA 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.: 9349 PW Placement Date: 09/20/2007 Weather Conditions: Cloudy Time Sampled: 05:40am Temperature - Air: 700F Truck No: 136 Air Content: NA Overall Placement Location: J, K, L, 1 Line 11-21 Batch time: 05:30am Concrete: 920F Ticket No: 13656 Unit Weight (pet): NA Measured Slump (inches) 5.0 Sample Location: Grid line J, K, L, 112-13 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 09/27/2007 7 6.00 28.27 104,490 3,700 Cone/Split 2 2 10/18/2007 28 6.00 28.27 135,390 4,790 Cone/Split 2 3 10/18/2007 28 6.00 28.27 121,020 4,280 Cone/Split Average 4,530 2 4 11/15/2007 56 6.00 28.27 154,970 5,480 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. (LB/JC) 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 Freidrlch, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 299350 Project No.: 0712932 Date of Service: 09/20/2007 Report Date: 11/16/2007 Project: Hemisphere's at Point West 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.): 3" - 5" Air (%): NA 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.: 9349 PW Placement Date: 09/20/2007 Weather Conditions: Sunny Time Sampled: 07:00am Temperature - Air: 700F Truck No: 106 Air Content: NA Overall Placement Location: J, K, L, / Line 11-21 Batch time: 06:28am Concrete: 900F Ticket No: 13665 Unit Weight (pet): NA Measured Slump (inches) 7.0 Sample Location: Grid line J, K, L, /13-14 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 09/27/2007 7 6.00 28.27 89,600 3,170 Cone/Split 3 2 10/18/2007 28 6.00 28.27 128,320 4,540 Cone/Split 3 3 10/18/2007 28 6.00 28.27 117,590 4,160 Cone/Shear Average 4,350 3 4 11/15/2007 56 6.00 28.27 141,870 5,020 Cona/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. (LB/JC) 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.: 299350 Project No.: 0712932 Date of Service: 09/20/2007 Report Date: 11/16/2007 Project: Hemisphere's at Point West 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.): 3" - 5" Air (%): NA 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.: 9349 PW Placement Date: 09/20/2007 Weather Conditions: Sunny Time Sampled: 07:50am Temperature - Air: 760F Truck No: 102 Air Content: NA Overall Placement Location: J, K, L, / Line 11-21 Batch time: 07:36am Concrete: 880F Ticket No: 13675 Unit Weight (pcf): NA Measured Slump (inches) 6.0 Sample Location: Grid line J, K, L, /14-15 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 09/27/2007 7 6.00 28.27 104,970 3,710 Cone/Split 4 2 10/18/2007 28 6.00 28.27 147,310 5,210 Cone/Split 4 3 10/18/2007 28 6.00 28.27 128,350 4,540 Cone/Split Average 4,870 4 4 11/15/2007 56 6.00 28.27 160,310 5,670 Cone/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. (LB/JC) Page 4 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.: 299350 Project No.: 0712932 Date of Service: 09/20/2007 Report Date: 11/16/2007 Project: Hemisphere's at Point West 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.): 3" - 5" Air (%): NA 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.: 9349 PW Placement Date: 09/20/2007 Weather Conditions: Sunny Time Sampled: 09:15am Temperature. Air: 760F Truck No: 117 Air Content: NA Overall Placement Location: J. K. L. / Line 11-21 Batch time: 08:33am Concrete: 920F Ticket No: 13685 Unit Weight (pcf): NA Measured Slump (inches) 6.0 Sample Location: Grid line J, K. L, /15-16 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 09/27/2007 7 6.00 28.27 87,580 3,100 Cone/Shear 5 2 10/18/2007 28 6.00 28.27 108,960 3,850 Shear 5 3 10/18/2007 28 6.00 28.27 108,410 3,830 Cone/Split Average 3,840 * 5 4 11/15/2007 56 6.00 28.27 147,610 5,220 Cone/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. (LB/JC) 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, 8te 600, Houston, TX 77040 4421 Freidrich, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 299350 Project No.: 0712932 Date of Service: 09/20/2007 Report Date: 11/16/2007 Project: Hemisphere's at Point West 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.): 3" - 5" Air (%): NA 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.: 9349 PW Placement Date: 09/20/2007 Weather Conditions: Sunny Time Sampled: 10:30am Temperature - Air: 840F Truck No: 132 Air Content: NA Overall Placement Location: J, K, L, 1 Line 11-21 Batch time: 10:06am Concrete: 920F Ticket No: 13697 Unit Weight (pet): NA Measured Slump (inches) 5.0 Sample Location: Grid line J, K, L, 116-17 REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Cylinder Maximum Com pressive Marked Date Age Diameter Area Load Strength Fracture Set No. Tested (days) (in) (in') (Ibs) (psi) Type 6 1 09/27/2007 7 6.00 28.27 82,800 2,930 Shear 6 2 10/18/2007 28 6.00 28.27 104,060 3,680 Shear 6 3 10/18/2007 28 6.00 28.27 96,970 3,430 Cone/Split Average 3,550 .. 6 4 11/15/2007 56 6.00 28.27 138,270 4,890 Cone/Split .. 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. (LB/JC) 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, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 299350 Project No.: 0712932 Date of Service: 09/20/2007 Report Date: 11/16/2007 Project: Hemisphere's at Point West 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 u i rements Strength: 4,000 psi @ 28 days Slump (in.): 3" - 5" Air (%): NA 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.: 9349 PW Placement Date: 09/20/2007 Weather Conditions: Sunny Time Sampled: 11:30am Temperature - Air: 880F Truck No: 102 Air Content: NA Overall Placement Location: J, K, L, / Line 11-21 Batch time: 11:17am Concrete: 920F Ticket No: 13710 Unit Weight (pet): NA Measured Slump (inches) 5.0 Sample Location: Grid line J, K, L, /17-18 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 09/27/2007 7 6.00 28.27 88,980 3,150 Shear 7 2 10/18/2007 28 6.00 28.27 113,040 4,000 Cone/Split 7 3 10/18/2007 28 6.00 28.27 112,260 3,970 Cone/Split Average 3,980 " 7 4 11/15/2007 56 6.00 28.27 141,050 4,990 Cone/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. (LB/JC) 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.: 299350 Project No.: 0712932 Date of Service: 09/20/2007 Report Date: 11/16/2007 Project: Hemisphere's at Point West 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.): 3" - 5" Air (%): NA 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 OAT A Mix Design 1.0.: 9349 PW Placement Date: 09/20/2007 Weather Conditions: Partly Cloudy Time Sampled: 12:40pm Batch time: 12:32pm Temperature - Air: 900F Concrete: 920F Truck No: 131 Ticket No: 13721 Air Content: NA Unit Weight (pct): NA Overall Placement Location: J, K, L, / Line 11-21 Measured Slump (inches) 5.0 Sample Location: Grid line J, K, L, /19-20 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 8 1 09/27/2007 7 6.00 28.27 94,180 3,330 Cone/Split 8 2 10/18/2007 28 6.00 28.27 108,690 3,840 Cone/Split 8 3 10/18/2007 28 6.00 28.27 111 ,490 3,940 Cone/Split Average 3,890 * 8 4 11/15/2007 56 6.00 28.27 143,840 5,090 Cone/Split * 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. (LB/JC) 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 Freidrlch, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 299350 Project No.: 0712932 Date of Service: 09/20/2007 Report Date: 11/16/2007 Project: Hemisphere's at Point West 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.): 3" - 5" Air (%): NA 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 OAT A Mix Design 1.0.: 9349 PW Placement Date: 09/20/2007 Weather Conditions: Sunny Time Sampled: 01:10pm Temperature - Air: 920F Truck No: 136 Air Content: NA Overall Placement Location: J, K, L, / Line 11-21 Batch time: 12:55pm Concrete: 940F Ticket No: 13725 Unit Weight (pet): NA Measured Slump (inches) 5.0 Sample Location: Grid line J, K, L, /18.8-19.8 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 09/27/2007 7 6.00 28.27 96,41 0 3,410 Shear 9 2 10/18/2007 28 6.00 28.27 125,730 4,450 Shear 9 3 10/18/2007 28 6.00 28.27 115,160 4,070 Cone/Split Average 4,260 9 4 11/15/2007 56 6.00 28.27 155,410 5,500 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. (LBIJC) Page 9 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.: 299350 Project No.: 0712932 Date of Service: 09/20/2007 Report Date: 11/16/2007 Project: Hemisphere's at Point West 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 u i rements Strength: 4,000 psi @ 28 days Slump (in.): 3" - 5" Air (%): NA 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.: 9349 PW Placement Date: 09/20/2007 Weather Conditions: Sunny Time Sampled: 01 :30pm Temperature - Air: 920F Truck No: 142 Air Content: NA Overall Placement Location: J, K, L, / Line 11-21 Batch time: 01:18pm Concrete: 940F Ticket No: 13729 Unit Weight (pet): NA Measured Slump (inches) 4.0 Sample Location: Grid line J, K, L, /19.9-20.4 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 10 1 09/27/2007 7 6.00 28.27 92,030 3,250 Cone/Split 10 2 10/18/2007 28 6.00 28.27 142,510 5,040 Cone/Split 10 3 10/18/2007 28 6.00 28.27 148,230 5,240 Cone/Split Average 5,140 10 4 11/15/2007 56 6.00 28.27 156,810 5,550 Cone/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. (LB/JC) 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.: 299350 Project No.: 0712932 Date of Service: 09/20/2007 Report Date: 11/16/2007 Project: Hemisphere's at Point West 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.): 3" - 5" Air (%): NA 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.: 9349 PW Placement Date: 09/20/2007 Weather Conditions: Sunny Time Sampled: 02:30pm Temperature - Air: 920F Truck No: 117 Air Content: NA Overall Placement Location: J, K, L, I Line 11-21 Batch time: 02: 15pm Concrete: 920F Ticket No: 13735 Unit Weight (pet): NA Measured Slump (inches) 5.0 Sample Location: Grid line J, K, L, I 20.4-21 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 11 1 09/27/2007 7 6.00 28.27 97,350 3,440 Cone/Split 11 2 10/18/2007 28 6.00 28.27 119,240 4,220 Cone/Split 11 3 10/18/2007 28 6.00 28.27 123,460 4,370 Shear Average 4,290 11 4 11/15/2007 56 6.00 28.27 157,350 5,570 Cone/Split Technician: Denny Harris Started: 02:30am Report Distribution: Orig: Duke Construction, LP (Dallas, TX) Altn: Mr. Paul Byrne (1-ec copy) 1-cc Potter Concrete Altn: Mr Ryan Skelly 1-cc City of Coppell Altn: Mr. Lee Stone 1-cc City of Coppell Altn: Mr. Larry Davis Finished: 03:45pm Rone Engineering /~~ ~ 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. (LB/JC) Page 11 of 11