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Duke Lesley 3C-LR071231 Rone En~== Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7701 W Little York, Ste 600, Houston, TX 77040 4421 Freidrich, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 303627 Project No.: 0711530 Date of Service: 10/31/2007 Report Date: 12/31/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Req uirements 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 PW Placement Date: 10/31/2007 Weather Conditions: Clear Time Sampled: 05:15am Temperature - Air: 610F Truck No: 109 Air Content: 4.0% Overall Placement Location: Paving - west of building 1 Batch time: 04:43am Concrete: 660F Ticket No: 8613 Unit Weight (pet): NA Measured Slump (inches) 4.5 Sample Location: 52' north, 30' west from south side of placement 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 11/07/2007 7 6.00 28.27 90,960 3,220 Shear 1 2 11/28/2007 28 6.00 28.27 134,040 4,740 Cone/Split 1 3 11/28/2007 28 6.00 28.27 141,330 5,000 Cone/Split Average 4,870 1 4 12/26/2007 56 6.00 28.27 141,210 4,990 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 1 of 7 Rone En~== Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7701 W Little York, Ste 600, Houston, TX 77040 4421 Freidrich, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 303627 Project No.: 0711530 Date of Service: 10/31/2007 Report Date: 12/31/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. PROJECT DATA Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 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 PW Placement Date: 10/31/2007 Weather Conditions: Clear Time Sampled: 05:55am Temperature - Air: 580F Truck No: 109 Air Content: 4.0% Overall Placement Location: Paving - west of building 1 Measured Slump (inches) 4.5 Batch time: 05:34am Concrete: 670F Ticket No: 8623 Unit Weight (pet): NA Sample Location: 120' north, 22' west from southeast end of placement 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 11/07/2007 7 6.00 28.27 99,710 3,530 Shear 2 2 11/28/2007 28 6.00 28.27 145,310 5,140 Cone/Split 2 3 11/28/2007 28 6.00 28.27 149,200 5,280 Cone/Shear Average 5,210 2 4 12/26/2007 56 6.00 28.27 157,980 5,590 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. (CHIKW) Page 2 of 7 Rone Eni=:= Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7701 W Little York, Ste 600, Houston, TX 77040 4421 Freidrich, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 303627 Project No.: 0711530 Date of Service: 10/31/2007 Report Date: 12/31/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. PROJECT DATA Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 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 PW Placement Date: 10/31/2007 Weather Conditions: Clear Time Sampled: 07:15am Temperature - Air: 610F Truck No: 110 Air Content: 4.0% Overall Placement Location: Paving - west of building 1 Measured Slump (inches) 4.0 Batch time: 06:47am Concrete: 700F Ticket No: 8633 Unit Weight (pct): NA Sample Location: 200' north, 24' west from southeast corner of placement 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 11/07/2007 7 6.00 28.27 85,120 3,010 Shear 3 2 11/28/2007 28 6.00 28.27 123,830 4,380 Cone/Split 3 3 11/28/2007 28 6.00 28.27 124,160 4,390 Shear Average 4,390 3 4 12/26/2007 56 6.00 28.27 136,010 4,810 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. LId. (CH/KW) Page 3 of 7 Rone En2~ 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.: 303627 Project No.: 0711530 Date of Service: 10/31/2007 Report Date: 12/31/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. PROJECT DATA Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 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 PW Placement Date: 10/31/2007 Weather Conditions: Sunny Time Sampled: 08:45am Temperature - Air: 620F Truck No: 109 Air Content: 4.0% Overall Placement Location: Paving - west of building 1 Measured Slump (inches) 4.75 Batch time: 08:25am Concrete: 700F Ticket No: 8643 Unit Weight (pet): NA Sample Location: 200' south, 24' west from northeast corner of placement 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 11/07/2007 7 6.00 28.27 94,450 3,340 Cone/Split 4 2 11/28/2007 28 6.00 28.27 132,560 4,690 Cone/Split 4 3 11/28/2007 28 6.00 28.27 129,410 4,580 Cone/Split Average 4,630 4 4 12/26/2007 56 6.00 28.27 151,350 5,350 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, LId. (CH/KW) Page 4 of 7 Rone En~== Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7701 W Little York, 8te 600, Houston, TX 77040 4421 Freidrich, 8te 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 303627 Project No.: 0711530 Date of Service: 10/31/2007 Report Date: 12/31/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Req uirements 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 PW Placement Date: 10/31/2007 Weather Conditions: Sunny Time Sampled: 09:35am Temperature - Air: 630F Truck No: 138 Air Content: 4.0% Overall Placement Location: Paving - west of building 1 Batch time: 09:24am Concrete: 690F Ticket No: 8653 Unit Weight (pet): NA Measured Slump (inches) 5.0 Sample Location: 150' south, 20' west from northeast corner of placement 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 11/07/2007 7 6.00 28.27 95,610 3,380 Cone/Split 5 2 11/28/2007 28 6.00 28.27 127,310 4,500 Cone/Split 5 3 11/28/2007 28 6.00 28.27 131,720 4,660 Shear Average 4,580 5 4 12/26/2007 56 6.00 28.27 150,220 5,310 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 5 of 7 Rone En~== Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 8908 Ambassador Row, Dallas, TX 75247 7701 W Little York, Ste 600, Houston, TX 77040 4421 Freidrich, Ste 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 303627 Project No.: 0711530 Date of Service: 10/31/2007 Report Date: 12/31/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. PROJECT DATA Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 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 PW Placement Date: 10/31/2007 Weather Conditions: Sunny Time Sampled: 11 :OOam Temperature - Air: 640F Truck No: 138 Air Content: 4.0% Overall Placement Location: Paving - west of building 1 Measured Slump (inches) 5.0 Batch time: 10:50am Concrete: 690F Ticket No: 8663 Unit Weight (pet): NA Sample Location: 90' south, 30' west from northeast corner of placement 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 11/07/2007 7 6.00 28.27 81,110 2,870 Shear 6 2 11/28/2007 28 6.00 28.27 111,010 3,930 Cone/Split 6 3 11/28/2007 28 6.00 28.27 112,070 3,960 Cone/Split Average 3,940 " 6 4 12/26/2007 56 6.00 28.27 124,640 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. (CHIKW) Page 6 of 7 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, 8te 195, Austin, TX 78744 Corporate Phone: (214) 630-9745 Report of Concrete Compressive Strength Test Report No.: 303627 Project No.: 0711530 Date of Service: 10/31/2007 Report Date: 12/31/2007 Project: Point West Office I Services: Obtain samples of fresh concrete at the placement locations, perform required testing, cast compressive strength samples and bring samples back to the laboratory for curing and testing in accordance with applicable standards. Contractor: Duke Construction, LP Concrete Supplier: Potter Concrete Plant: 10 Specification Requirements Strength: 4,000 psi @ 28 days Slump (in.): 3" - 5" Air (0/0): 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 PW Placement Date: 10/31/2007 Weather Conditions: Sunny Time Sampled: 12:05pm Temperature - Air: 700F Truck No: 138 Air Content: 5.0% Overall Placement Location: Paving - west of building 1 Batch time: 11 :51am Concrete: 730F Ticket No: 8673 Unit Weight (pet): NA Measured Slump (inches) 5.0 Sample Location: 40' south, 40' west from northeast corner of placement 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 11/07/2007 7 6.00 28.27 81,870 2,900 Shear 7 2 11/28/2007 28 6.00 28.27 122,180 4,320 Cone/Split 7 3 11/28/2007 28 6.00 28.27 116,550 4,120 Cone/Split Average 4,220 7 4 12/26/2007 56 6.00 28.27 126,040 4,460 Cone/Split Started: 03:30am Finished: 01 :45pm Technician: Brad Hickman 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 Rone Engineering p~~ 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. (CHIKW) Page 7 of 7