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Duke Lesley 3C-LR070919 Rone Engineering . 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 Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 Report of In-Place Density Testing Report No.: 298903 Project No.: 0711530 Date of Service: 09/17/2007 Report Date: 09/19/2007 Project: Point West Office I Services: Perform In-Place Density Testing PROJECT DATA Contractor: Duke Construction, LP Test Method: ASTM D-6938 Gauge: Troxler 3430 Gauge Serial No: 35518 Test Mode: DT Standard Counts Moisture Density Current: 739 Current: 2519 Previous: 741 Previous: 2526 MOISTURE DENSITY RELATIONS MID No. 272998 Description Brown I Silty Clay wI Organics Moisture % Maximum Density (pet) 96.5 Project Requirements Moisture Density Minimum +4 92-96 22.5 Test No Test Location FIELD DENSITY TESTS Probe MID Depth No. Moisture Wet Density Dry Density Density % (pet) (pet) (% maxI Utility backfill 35' from south end of TXU line, 3' below grade 6" 272998 28.7 118.3 91.9 95 Utility backfill 2 35' from south end of TXU line, 2' below grade 6" 272998 29.7 117.1 90.3 94 Utility backfill 3 35' from south end of TXU line, l' below grade 6" 272998 28.7 117.0 90.9 94 Utility backfill 4 35' from south end of TXU line, final 6" 272998 29.1 116.6 90.3 94 Technician: Joe Jernigan Started: 07:15am 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 City of Coppell Attn: Mr. Larry Davis Finished: 10:00am 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, LId (CH/JS) 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 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.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 09/19/2007 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.): 4" - 6" Air (%): 3% - 5% 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: 09/08/2007 Weather Conditions: Clear Time Sampled: 05:20am Temperature - Air: 790F Truck No: 108 Air Content: 4.3% Overall Placement Location: Paving at Point West 1, building 1 - southern half of east parking Measured Slump (inches) 6.0 Batch time: 05:03am Concrete: 860F Ticket No: 7345 Unit Weight (pct): NA Sample Location: 65' north, 100' west from southeast corner of paving REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 88,740 Cylinder Marked Date Set No. Tested 3 1 09/15/2007 3 2 10/06/2007 3 3 10/06/2007 3 4 11/03/2007 Age (days) 7 Diameter (in) 6.00 28 28 56 Compressive Strength (psi) 3,140 Fracture Type Cone/Split Area (in2) 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/JB) Page 3 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, 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.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 09/19/2007 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.): 4" - 6" Air (%): 3% - 5% 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: 09/08/2007 Weather Conditions: Clear Time Sampled: 07:15am Temperature - Air: 800F Truck No: 135 Air Content: 4.8% Overall Placement Location: Paving at Point West 1, building 1 - southern half of east parking Measured Slump (inches) 6.5 Batch time: 06:52am Concrete: 880F Ticket No: 7355 Unit Weight (pct): NA Sample Location: 110' north, 50' west from northeast corner of paving REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 91,230 Cylinder Marked Date Set No. Tested 4 1 09/15/2007 4 2 10/06/2007 4 3 10/06/2007 4 11/03/2007 Age (days) 7 Diameter (in) 6.00 28 28 56 Compressive Strength (psi) 3,230 Fracture Type Shear 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/JB) Page 4 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, 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.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 09/19/2007 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.): 4" - 6" Air (%): 3% - 5% 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: 09/08/2007 Weather Conditions: Sunny, clear Time Sampled: 08:15am Batch time: 07:57am Temperature. Air: 850F Concrete: 920F Truck No: 108 Ticket No: 7364 Air Content: 4.8% Unit Weight (pcf): NA Overall Placement Location: Paving at Point West 1, building 1 - southern half of east parking Measured Slump (inches) 5.25 Sample Location: 150' north, 100' west from southeast corner of paving REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 80,190 Cylinder Marked Date Set No. Tested 5 1 09/15/2007 5 2 10/06/2007 5 3 10/06/2007 5 4 11/C3/2007 Age (days) 7 Diameter (in) 6.00 28 28 56 Remarks: Water added at site: 10 gallons Compressive Strength (psi) 2,840 Fracture Type Cone/Split 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 approyal of Rone Engineering Services, Ltd. (CH/JS) Page 5 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, 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.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 09/19/2007 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.): 4" - 6" Air (%): 3% - 5% 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: 09/08/2007 Weather Conditions: Sunny, clear Time Sampled: 10:30am Batch time: 10:09am Temperature - Air: 850F Concrete: 920F Truck No: 108 Ticket No: 7381 Air Content: 4.5% Unit Weight (pcf): NA Overall Placement Location: Paving at Point West 1, building 1 - southern half of east parking Measured Slump (inches) 5.0 Sample Location: 200' north, 125' west from southeast corner of paving REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Cylinder Maximum Compressive Marked Date Age Diameter Area Load Strength Fracture Set No. Tested (days) (in) (in2) (Ibs) (psi) Type 6 1 09/15/2007 7 6.00 28.27 83,530 2,950 Shear 6 2 10/06/2007 28 6 3 10/06/2007 28 6 4 11/03/2007 56 Remarks: Water added at site: 10 gallons LIMITATIONS: The test results presented herein were prepared based upon the specific samples provided for testing. We assume no responsibility for variation in quality (composition, appearance, etc.) or any other feature of similar subject matter provided by persons or conditions over which we have no control. Our letters and reports are for the exclusive use of the clients to whom they are addressed and shall not be reproduced except in full without the written approval of Rone Engineering Services, Ltd. (CH/JB) 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, 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.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 09/19/2007 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.): 4" - 6" Air (%): 3% - 5% 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.: 7752 PW Placement Date: 09/08/2007 Weather Conditions: Clear Time Sampled: 11: 1 Oam Temperature - Air: 85DF Truck No: 137 Air Content: 4.5% Overall Placement Location: Paving at Point West 1, building 1 - southern half of east parking Measured Slump (inches) 5.0 Batch time: 1 0:42am Concrete: 95DF Ticket No: 7387 Unit Weight (pet): NA Sample Location: 240' north, 75' west from southeast corner of paving REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 82,570 Cylinder Marked Date Set No. Tested 7 1 09/15/2007 7 2 10/06/2007 7 3 10/06/2007 7 4 11/03/2007 Age (days) 7 Diameter (in) 6.00 28 28 56 Remarks: Water added at site: 10 gallons Compressive Strength (psi) 2,920 Fracture Type Shear Area (in') 28.27 Started: 02:00am Finished: 01 :45pm Technician: Montreal Bailey Report Distribution: Orig: Duke Construction, LP (Dallas, TX) Attn: Mr. Paul Byrne (1-ec copy) 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. (CH/JB) Page 7 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, 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.: 298183 Project No.: 0711530 Date ot Service: 09/08/2007 Report Date: 09/19/2007 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.): 4" - 6" Air (%): 3% - 5% 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: 09/08/2007 Weather Conditions: Clear Time Sampled: 04:40am Temperature - Air: 790F Truck No: 144 Air Content: 4.0% Overall Placement Location: Paving at Point West 1, building 1 - southern half of east parking Measured Slump (inches) 4.0 Batch time: 04:21am Concrete: 860F Ticket No: 7337 Unit Weight (pet): NA Sample Location: 30' north, 25' west from southeast corner of paving REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 132,780 Cylinder Marked Date Set No. Tested 2 1 09/15/2007 2 2 10/06/2007 2 3 10/06/2007 2 4 11/03/2007 Age (days) 7 Diameter (in) 6.00 28 28 56 Compressive Strength (psi) 4,700 Fracture Type Cone/Split 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/JB) Page 2 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, 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.: 298183 Project No.: 0711530 Date of Service: 09/08/2007 Report Date: 09/19/2007 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.): 4" - 6" Air (%): 3% - 5% 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: 09/08/2007 Weather Conditions: Clear Time Sampled: 03:30am Temperature - Air: 790F Truck No: 142 Air Content: 4.1 % Overall Placement Location: Paving at Point West 1, building 1 - southern half of east parking Measured Slump (inches) 4.5 Batch time: 02:55am Concrete: 860F Ticket No: 7325 Unit Weight (pcf): NA Sample Location: 15' north, 10' west from southeast corner of paving REPORT OF TESTS Concrete Compressive Cylinder 6" x 12" Maximum Load (Ibs) 140,000 Cylinder Marked Date Set No. Tested 1 1 09/15/2007 1 2 10/06/2007 1 3 10/06/2007 1 4 11/03/2007 Age (days) 7 Diameter (in) 6.00 28 28 56 Compressive Strength (psi) 4,950 Fracture Type Cone/Shear Area (in2) 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/JB) Page 1 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, 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.: 298031 Project No.: 0711530 Date of Service: 09/07/2007 Report Date: 09/19/2007 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 Plant: 01 Specification Requirements Strength: 3,000 psi @ 28 days Slump (in.): 5" - 7" 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: 09/07/2007 Weather Conditions: Sunny Time Sampled: 09:40am Temperature - Air: 840F Truck No: 1063 Air Content: NA Overall Placement Location: Piers, Station F.1/9.9 Batch time: 08:49am Concrete: 860F Ticket No: 13297 Unit Weight (pet): NA Measured Slump (inches) 5.0 Sample Location: Station F.1/9.9 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 09/14/2007 7 6.00 28.27 78,810 2,790 Cone/Split 1 2 10/05/2007 28 1 3 10/05/2007 28 1 4 11/02/2007 56 Technician: Denny Harris Rone Engineering See Report 298030 for technician time~~ Report Distribution: Orig: Duke Construction, LP (Dallas, TX) Alln: Mr. Paul Byrne .' . . .... ." .' . .' .' (1-ec copy) - 1-cc p~ller Concrete Alln: Mr. Ryan Skelly K. Scott Watson, AET 1-cc City of Coppell Alln: Mr. Lee Stone p . t M .' roJec anager 1-cc City of Coppell Alln: 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, Ltd. (CH/JB) Page 1 of 1 Rone Engineering . 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 Client: Duke Construction, LP 14241 Dallas Pkwy, Ste 1000 Dallas, TX 75254-2936 Report of Drilled Pier Inspection Report No.: 298872 Project No.: 0711530 Date of Service: 09/17/2007 Report Date: 09/19/2007 Project: Point West Office I Services: Straight Shaft Pier Inspection Report of Inspection D rille r: M cK inney Pier Identification F .8/01 H 118 F .2/1 8 PierDiameter(in) 3 0 IF 7 30 IF 7 30 IF 7 Depth of Pier From Surface(ft) 46.00 43.40 44.00 Depth ofBearinq Stratum Fro m Surface (ft) 37.00 33.00 34.00 Required Penetration (ft) 9.00 9.00 9.00 A ctua I P e ne tra tio n (ft)* 9.00 10.40 10.00 Con d i ti 0 n 0 f Botto m (wet/dry) Dry Dry Dry Plumb Within Tolerance (yes Ino) Yes Yes Yes Casinq Diameter(in)/Casing Lenqth (ft) N/A N/A N/A NumberofBars IReinforcing BarSize 33/35.8 33/35.8 33/35.8 Le ng th of R e info rcing S tee I (ft) 44.00 41.00 42.00 Time Drilling was Completed (am I pm) 8 :2 0 AM 1 1 :30 AM 1 :20 P M Time Concrete was Placed (am Ipm) 10:20 AM 12:45 PM 2:15 PM De p th 0 f Pie r Fro m Top 0 f Con c re te (ft) 44.42 41.82 42.42 E leva tio n: S urfa ce (ft)** 99.58 99.58 99.58 Elevation:Top of Pier (ft)** 98.00 98.00 98.00 Elevation: Bottom ofPier(ft)** 53.58 56.18 55.58 Elevation: Top ofBearinq Stratum (ft.) ** 62.58 66.58 65.58 Bearinq Stratum (description) Gray shale Note: See report # 298904 for Compressive Strength Test Specimens. . Additional Penetration not requested unless noted. HE levation by others Technician: Denny Harris Started: 06:15am 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 City of Coppell Attn: Mr. Larry Davis Finished: 03:00pm Rone Engineering P-ad- ~ K. Scott Watson, AET Project Manager LIMITATIONS: The test results presented herein were prepared based upon the specific samples provided for testing. We assume no responsibility for variation in quality (composition, appearance, etc.) or any other feature of similar subject matter provided by persons or conditions over which we have no control. Our letters and reports are for the exclusive use of the clients to whom they are addressed and shall not be reproduced except in full without the written approval of Rone Engineering Services, Ltd. (CH/KW) Page 1 of 1 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.: 295798 Project No.: 0711530 Date of Service: 08/16/2007 Report Date: 09/19/2007 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: Redi-Mix Plant: 136 Specification Requirements Strength: 3,000 psi @ 28 days Slump (in.): 5" - 7" 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.: 830J1521 Placement Date: 08/16/2007 Weather Conditions: Clear Time Sampled: 11 :32am Temperature - Air: 930F Truck No: 1039 Air Content: NA Overall Placement Location: Piers (see report #295797) Batch time: 10:50am Concrete: 950F Ticket No: 13694307 Unit Weight (pet): NA Measured Slump (inches) 5.75 Sample Location: Pier P/5.S 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 08/23/2007 7 6.00 28.27 92,550 3,270 Unbonded Cap 1 2 09/13/2007 28 6.00 28.27 115,280 4,080 Cone/Split 1 3 09/13/2007 28 6.00 28.27 114,000 4,030 Shear Average 4,050 4 10/11/2007 56 Remarks: Water added at site: 10 gallons Report Distribution: Orig: Duke Construction, LP (Dallas, TX) Attn: Mr. Brian Pierce (1-cc copy) 1-cc City of Coppell Attn: Mr. Lee Stone 1-cc City of Coppell Attn: Mr. Larry Davis Rone Engineering $e, R",ort 295797 foc"clm;aoo tim'p~ ~ K. Scott Watson, AET Project Manager Technician: Gerry Graham 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/LB) Page 1 of 1