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Duke Lesley 2A-LR071126 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.: 299952 Project No.: 0712932 Date of Service: 09/26/2007 Report Date: 11/26/2007 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: 01 Specification Requirements Strength: 3,000 psi @ 28 days Slump (in.): NA 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.: 7751 PW Placement Date: 09/26/2007 Weather Conditions: Partly Cloudy Time Sampled: 09:20am Batch time: 08:39am Temperature - Air: 790F Concrete: 860F Truck No: 107 Ticket No: 7823 Air Content: NA Unit Weight (pet): NA Overall Placement Location: Building piers 24.8-20.2/L - 10 piers, 1 pier cap at B/27-27.1 Measured Slump (inches) 7.25 Sample Location: Building pier U24.8 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) (in2) (Ibs) (psi) Type 1 1 10/03/2007 7 6.00 28.27 57,540 2,040 Cone/Split 1 2 10/03/2007 7 6.00 28.27 59,940 2,120 Shear Average 2,080 1 3 10/24/2007 28 6.00 28.27 76,950 2,720 Cone/Split 1 4 10/24/2007 28 6.00 28.27 86,770 3,070 Cone/Split Average 2,900 * 1 5 11/21/2007 56 6.00 28.27 96,450 3,410 Cone/Shear * Does not comply with specified strength Technician: Chris Harbour Rone Engineering See Report 299951 for technician timeA ~ Report Distribution: .... ~~ Orig' Doke Co",l,"olloo, IP (D.".., TX) All" M,. P,"' Byrne . - - ,- - -~ = -=-----' (1-ec copy) - - - 1-cc Potter Concrete Altn: Mr Ryan Skelly K. Scoll Watson, AET 1-cc C~ty of Coppell Attn: Mr. Lee Stone. Project Manager 1-cc CIty of Coppell AUn: Mr. Larry DavIs 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, LId. (LB/KW) Page 1 of 1 Rone Engineering . Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7101 W Little York, Ste 600, Houston, TX 71040 4421 Freidrich, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 299967 Project No.: 0712932 Date of Service: 09/26/2007 Report Date: 11/26/2007 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: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 3" - 6" 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 Placement Date: 09/26/2007 Weather Conditions: Cloudy, calm Time Sampled: 03:30am Batch time: 03:18am Temperature - Air: 700F Concrete: 820F Truck No: 129 Ticket No: 7771 Air Content: 0.5% Unit Weight (pet): NA Overall Placement Location: Slab on grade, grid lines E-G/11-21 (west) Measured Slump (inches) 5.0 Sample Location: Grid line E/11.5 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 1 1 10/03/2007 7 6.00 28.27 85,160 3,010 Cone/Split 1 2 10/24/2007 28 6.00 28.27 117,770 4,170 Cone/Shear 1 3 10/24/2007 28 6.00 28.27 124,390 4,400 Cone/Split Average 4,280 1 4 11/21/2007 56 6.00 28.27 125,690 4,450 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/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.: 299967 Project No.: 0712932 Date of Service: 09/26/2007 Report Date: 11/26/2007 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: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 3" - 6" 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 Placement Date: 09/26/2007 Weather Conditions: Cloudy, calm Time Sampled: 04:15am Batch time: 03:59am Temperature - Air: 710F Concrete: 800F Truck No: 107 Ticket No: 7779 Air Content: 0.4% Unit Weight (pcf): NA Overall Placement Location: Slab on grade, grid lines E-G/11-21 (west) Measured Slump (inches) 5.0 Sample Location: Grid line E.8/12.2 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 10/03/2007 7 6.00 28.27 71,650 2,530 Cone/Shear 2 2 10/24/2007 28 6.00 28.27 96,510 3,410 Shear 2 3 10/24/2007 28 6.00 28.27 91,330 3,230 Shear Average 3,320 * 2 4 11/21/2007 56 6.00 28.27 124,610 4,410 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/KW) Page 2 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.: 299967 Project No.: 0712932 Date of Service: 09/26/2007 Report Date: 11/26/2007 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: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 3" - 6" 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 Placement Date: 09/26/2007 Weather Conditions: Cloudy, calm Time Sampled: 04:40am Batch time: 04:36am Temperature - Air: 740F Concrete: 820F Truck No: 107 Ticket No: 7786 Air Content: 0.6% Unit Weight (pcf): NA Overall Placement Location: Slab on grade, grid lines E-G/11-21 (west) Measured Slump (inches) 5.5 Sample Location: Grid line F.2/13.8 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 3 1 10/03/2007 7 6.00 28.27 94,740 3,350 Cone/Split 3 2 10/24/2007 28 6.00 28.27 121,630 4,300 Shear 3 3 10/24/2007 28 6.00 28.27 126,850 4,490 Cone/Split Average 4,390 3 4 11/21/2007 56 6.00 28.27 139,690 4,940 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/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.: 299967 Project No.: 0712932 Date of Service: 09/26/2007 Report Date: 11/26/2007 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: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 3" - 6" Air (%): NA 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 OAT A Mix Design 1.0.: 9349 Placement Date: 09/26/2007 Weather Conditions: Cloudy, calm Time Sampled: 06:00am Batch time: 05:33am Temperature - Air: 750F Concrete: 890F Truck No: 141 Ticket No: 7798 Air Content: 0.6% Unit Weight (pcf): NA Overall Placement Location: Slab on grade, grid lines E-G/11-21 (west) Measured Slump (inches) 5.0 Sample Location: Grid line E.2/14.5 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 10/03/2007 7 6.00 28.27 94,460 3,340 Cone/Shear 4 2 10/24/2007 28 6.00 28.27 127,900 4,520 Cone/Shear 4 3 10/24/2007 28 6.00 28.27 122,670 4,340 Cone/Split Average 4,430 4 4 11/21/2007 56 6.00 28.27 137,290 4,860 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/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.: 299967 Project No.: 0712932 Date of Service: 09/26/2007 Report Date: 11/26/2007 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: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 3" - 6" Air (%): NA 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.: 9349 Placement Date: 09/26/2007 Weather Conditions: Cloudy, calm Time Sampled: 07:30am Batch time: 06:54am Temperature - Air: 710F Concrete: 800F Truck No: 129 Ticket No: 7806 Air Content: 0.3% Unit Weight (pcf): NA Overall Placement Location: Slab on grade, grid lines E-G/11-21 (west) Measured Slump (inches) 5.5 Sample Location: Grid line G/15.2 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 10/03/2007 7 6.00 28.27 105,500 3,730 Cone/Split 5 2 10/24/2007 28 6.00 28.27 143,610 5,080 Shear 5 3 10/24/2007 28 6.00 28.27 141,040 4,990 Cone/Split Average 5,030 5 4 11/21/2007 56 6.00 28.27 154,860 5,480 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/KW) Page 5 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.: 299967 Project No.: 0712932 Date of Service: 09/26/2007 Report Date: 11/26/2007 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: 10 Specification Req u i rements Strength: 4,000 psi @ 28 days Slump (in.): 3" - 6" 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 Placement Date: 09/26/2007 Weather Conditions: Cloudy, calm Time Sampled: 08:46am Batch time: 08:19am Temperature - Air: 800F Concrete: 880F Truck No: 128 Ticket No: 7820 Air Content: 0.3% Unit Weight (pet): NA Overall Placement Location: Slab on grade, grid lines E-G/11-21 (west) Measured Slump (inches) 5.0 Sample Location: Grid line E.8/16.3 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 10/03/2007 7 6.00 28.27 103,930 3,680 Cone/Split 6 2 10/24/2007 28 6.00 28.27 130,360 4,610 Cone/Split 6 3 10/24/2007 28 6.00 28.27 133,740 4,730 Shear Average 4,670 6 4 11/21/2007 56 6.00 28.27 146,760 5,190 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. (LB/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 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.: 299967 Project No.: 0712932 Date of Service: 09/26/2007 Report Date: 11/26/2007 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: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 3" - 6" 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 Placement Date: 09/26/2007 Weather Conditions: Cloudy, calm Time Sampled: 10:50am Batch time: 10:24am Temperature - Air: 780F Concrete: 900F Truck No: 141 Ticket No: 7837 Air Content: 0.6% Unit Weight (pcf): NA Overall Placement Location: Slab on grade, grid lines E-G/11-21 (west) Measured Slump (inches) 5.5 Sample Location: Grid line E.6/17 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 10/03/2007 7 6.00 28.27 104,180 3,680 Shear 7 2 10/24/2007 28 6.00 28.27 124,000 4,390 Shear 7 3 10/24/2007 28 6.00 28.27 132,390 4,680 Cone/Split Average 4,530 7 4 11/21/2007 56 6.00 28.27 149,970 5,300 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/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.: 299967 Project No.: 0712932 Date of Service: 09/26/2007 Report Date: 11/26/2007 Project: Hemisphere's at Point West Coppell, Texas Services: Obtain samples of fresh concrete at the placement locations, perform required lesting, 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 Spt#cification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 3" - 6" 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 Placement Date: 09/26/2007 Weather Conditions: Cloudy, calm Time Sampled: 11 :30am Batch time: 10:55am Temperature - Air: 850F Concrete: 900F Truck No: 103 Ticket No: 7843 Air Content: 0.7% Unit Weight (pcf): NA Overall Placement Location: Slab on grade, grid lines E-G/11-21 (west) Measured Slump (inches) 6.0 Sample Location: Grid line F/18.5 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 10/03/2007 7 6.00 28.27 97,440 3,450 Cone/Split 8 2 10/24/2007 28 6.00 28.27 128,740 4,550 Cone/Split 8 3 10/24/2007 28 6.00 28.27 124,230 4,390 Cone/Split Average 4,470 8 4 11/21/2007 56 6.00 28.27 144,530 5,110 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/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 Freidrlch, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 299967 Project No.: 0712932 Date of Service: 09/26/2007 Report Date: 11/26/2007 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: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 3" - 6" 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 Placement Date: 09/26/2007 Weather Conditions: Cloudy, calm Time Sampled: 12:00pm Batch time: 11:41am Temperature - Air: 850F Concrete: 900F Truck No: 128 Ticket No: 7852 Air Content: 0.4% Unit Weight (pcf): NA Overall Placement Location: Slab on grade, grid lines E-G/11-21 (west) Measured Slump (inches) 6.0 Sample Location: Grid line E/19.5 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 10/03/2007 7 6.00 28.27 98,680 3,490 Cone/Split 9 2 10/24/2007 28 6.00 28.27 127,700 4,520 Cone/Split 9 3 10/24/2007 28 6.00 28.27 134,280 4,750 Shear Average 4,630 9 4 11/21/2007 56 6.00 28.27 134,360 4,750 Shear Technician: David Best Started: 02:30am Report Distribution: Orig: Duke Construction, LP (Dallas, TX) Attn: Mr. Paul Byrne (1-ec copy) 1-cc Potter Concrete Alln: Mr Ryan Skelly 1-cc City of Coppell Attn: Mr. Lee Stone 1-cc City of Coppell Attn: Mr. Larry Davis Finished: 03:00pm 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/KW) Page 9 of 9