KTA-TATOR, INC. 115 Technology Drive, Pittsburgh, PA July 7, 2011 Via

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1 KTA-TATOR, INC. 115 Technology Drive, Pittsburgh, PA Fax July 7, 2011 Via Mr. Havard Undrum Jotun Paints PO Box Sandefjord Norway Subject: Results of Slip Coefficient and Tension Creep Testing Jotun Resist 86AV Zinc-Rich Inorganic Primer; KTA-Tator, Inc. Project No Dear Mr. Undrum: In accordance with KTA-Tator, Inc. (KTA) Proposal PN and authorizing wire transfer of funds dated February 4, 2011, KTA has completed the testing of one (1) Jotun Resist 86AV zinc-rich coating for Class B slip coefficient and tension creep properties using ASTM A 490 bolts. This report describes the specimen preparation and testing procedures, and contains the results of the testing. EXECUTIVE SUMMARY Jotun Resist 86AV zinc-rich ethyl silicate primer was tested for slip coefficient and tension creep properties using ASTM A490 bolts according to the requirements of Appendix A of the Specification for Structural Joints Using High-Strength Bolts, prepared by the Research Council on Structural Connections (December 31, 2009). The primer exhibited a Slip Coefficient of 0.64 and passed the 1,000-hour Creep Deformation test. The primer is certified Class B. SAMPLES The coating materials listed below were received from Jotun Paints. It should be noted that KTA did not witness the manufacturing or packaging of the coating materials. Jotun Resist 86AV Zinc-Rich Ethyl Silicate Primer Part A Batch No.: PQ Part B Batch No.: Coatings & Corrosion Consulting Environmental, Health & Safety Laboratory Analysis Materials Testing Paint Inspection Steel Inspection

2 Mr. Havard Undrum 2 of 5 July 7, 2011 SPECIMEN PREPARATION PROCEDURES The following sections describe the surface preparation and coating application procedures used to prepare the slip coefficient and tension creep specimens. Substrate Material The test specimens were fabricated from ⅝ thick cold rolled carbon steel plate. The slip coefficient test specimens were comprised of flat (no raised edges, protruding defects or warp) 4 x 4 plates with a 1 hole drilled 1 ½ from one edge and one ⅝ width side machined smooth. The planarity (surface flatness) of both sides of each specimen was checked on a machined, cast steel surface prior to surface preparation. A test specimen is represented by a set of three (3) plates. Five (5) sets (3 specimens per set) and five (5) spare test plates (a total of 20 plates) were prepared for slip coefficient testing. The tension creep specimens were also flat (no raised edges, protruding defects or warp) 4 x 7 plates with two (2) 1 holes drilled 1 ½ from each end. The planarity (surface flatness) of both sides of each specimen was checked on a machined, cast steel surface prior to surface preparation. A test specimen is represented by a set of three (3) test plates. Three (3) specimens (9 plates) and three (3) spare test plates (a total of 12 plates) were prepared for tension creep testing. Surface Preparation The fabricated test plates were prepared by solvent cleaning per SSPC-SP1, Solvent Cleaning, then abrasive blast cleaned (except edges) to achieve an SSPC-SP5, White Metal Blast using 50%/50% G80/G120 steel grit. The degree of surface cleanliness was verified using photographic reference A SP5 of SSPC Visual Standard No. 1 (VIS 1), Guide and Reference Photographs for Steel Surfaces Prepared by Abrasive Blast Cleaning. The surface profile depth was measured in accordance with ASTM D 4417, Standard Test Methods for Field Measurement of Surface Profile of Blast Cleaned Steel, Method C (replica tape). Surface profile measurements were obtained from both sides of randomly selected test specimens using Testex X-Coarse ( mils) replica tape. The actual surface profile depth ranged from 2.5 to 2.7 mils. Coating Application and Curing Application of the coatings to the slip and creep plates was conducted using airless spray application. Specimens were oriented horizontally in customized holders, and the edges were not coated. A complete kit of primer was mixed (as supplied); no thinner was used in the application. The coating was applied using a Titan Speeflow 60:1 airless spray pump. Actual mixing and application conditions were recorded and are available upon request. Jotun Paints provided Product Data and Application Instructions. Coating thickness was measured on both sides of each specimen in accordance with SSPC-D 7091, Standard Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and

3 Mr. Havard Undrum 3 of 5 July 7, 2011 Nonmagnetic, Nonconductive Coatings Applied to Non-ferrous Metals using a PosiTector Model 6000-F1 nondestructive electro-magnetic coating thickness gage verified for accuracy using plastic calibration shims. The applied thickness was 50µm (2 mils) greater than the coating manufacturers maximum coating thickness. The actual coating thickness measurements were recorded on Coating Thickness Forms. The specified maximum thickness was 3.6 mils (90 microns). Therefore the target test thickness was 5.6 mils, as Appendix A of the specification requires the addition of 2 mils dry film thickness to the manufacturers recommended maximum thickness. The coatings were cured at ambient laboratory conditions for 24 hours (as stipulated by Jotun) prior to testing. The air temperature during the curing period ranged from o C; the relative humidity ranged from 77-83%. Mating of Test Surfaces Based on Coating Thickness After curing, surfaces with common coating thickness characteristics (and within the target thickness range) were mated for both the slip coefficient and tension creep testing. The following table contains the mating surfaces and the average coating thickness on each test face. Specimen No. Plate ID, Face and Coating Thickness End Panel Plate ID and Coating Thickness Middle Panel Front (F) Back (B) Plate ID, Face and Coating Thickness End Panel 1 (Slip) 3B (5.1 mils) 9 (5.1 mils) 9 (5.4 mils) 7B (5.3 mils) 2 (Slip) 18B (6.2 mils) 1 (6.1 mils) 1 (5.7 mils) 13B (6.1 mils) 3 (Slip) 12B (6.0 mils) 19 (6.0 mils) 19 (6.0 mils) 15F (6.0 mils) 4 (Slip) 14B (6.0 mils) 20 (6.0 mils) 20 (5.9 mils) 2B (5.9 mils) 5 (Slip) 10B (5.5 mils) 16 (6.0 mils) 16 (6.1 mils) 4B (5.5 mils) 1 (Creep) 23B (5.8 mils) 21 (5.8 mils) 21 (6.1 mils) 24B (5.8 mils) 2 (Creep) 27B (5.9 mils) 22 (6.1 mils) 22 (5.9 mils) 28B (6.0 mils) 3 (Creep) 30B (6.0 mils) 25 (5.9 mils) 25 (5.8 mils) 31B (5.8 mils) TESTING EQUIPMENT AND PROCEDURES The following test equipment and procedures were employed to perform the slip coefficient and tension creep testing. All testing was performed according to the procedures set forth in Appendix A of the Specification for Structural Joints Using High-Strength Bolts, prepared by the Research Council on Structural Connections (December 31, 2009) and KTA Standard Operation Procedure (SOP) T7095-R.6, Determining the Slip Coefficient and Tension Creep of Coatings Used in Bolted Joints (Slip and Creep Testing). ASTM A490 bolts were employed.

4 Mr. Havard Undrum 4 of 5 July 7, 2011 Slip Coefficient Equipment and Test Procedure The KTA slip coefficient test, 50 ton capacity test frame is equipped with an Enerpac 10,000 psi (70 kips) load cell controlled by a Sensotec GM (controls horizontal clamping force and a Sensotec SC2000 (controls vertical force and displays the distance the center plate moves in relation to the two [2] end plates). The load cell, linear transducer and digital controllers are calibrated annually by US Calibration Services, Inc. Three (3) test plates (4 x 4 ) comprised a test assembly. Five (5) replicate test assemblies were evaluated. Each test assembly was loaded onto the ⅞ diameter horizontal rod, based on contact surfaces having similar coating thickness (shown in the table above). The middle plate (having two [2] contact surfaces) is oriented so that the load is applied to a machined edge by the vertical force platen, while the two (2) end panels (having only one [1] contact surface each) are oriented so that the bottom, machined edges are positioned on the LVDT platen. A clamping force of 49 kips was applied to the test assembly, then a compressive load was applied to the machined edge of the middle plate at a rate not-to-exceed 25 kips/minute, to induce a slip. An X-Y plotter simultaneously recorded the load and slip values. The results of the five (5) replicate tests and the average coefficient of slip are contained in the test results section of this report. The slip load for each test assembly is divided by two times (2X) the clamping force to obtain the slip coefficient. Tension Creep Equipment and Test Procedure Tension creep testing was performed on a multi-chain reinforced steel test frame with a maximum capacity of 200,000 pounds. Three (3) test plates (4 x 7 ) comprised a test assembly. Three (3) replicate test assemblies (total of 9 plates) were assembled using ASTM A490 bolts manufactured by LaJuene Bolt Company. A Certificate of Analysis is on file. All bolts were from Lot # 47561C. A calibrated load cell was used to apply 39.2 kips of vertical pull to the chain and the load was maintained using heavy duty springs positioned in the base of the test frame. Magnets positioned on the edges on the test plates and calibrated micrometers were used to detect movement. The relative creep was measured between the outside plates and the center plate on both sides of the assembly. The accuracy of each measurement is in (+/ ). Readings were obtained from each micrometer and the main spring tension micrometer for a duration of 1000 hours (42 days). Readings were not obtained on weekends/holidays. Measurements were recorded on form KTA T7095B (attached). The load was applied for 1,000 hours or until failure, which is noted by a creep deformation of greater than inches. At the end of the 1,000 hours, the load was increased to 49 kips, and the deformation readings were again obtained. The creep deformation was calculated using the average reading of the two (2) displacements on each side of the specimen. The difference between the average after 1,000 hours and the initial average reading taken within 30 minutes after loading the specimens was defined as the creep deformation of the specimen. This value was recorded for each interface of each specimen on Form KTA T7095B (attached). The results of the tension creep testing are contained in the test results section of this report.

5 Mr. Havard Undrum 5 of 5 July 7, 2011 TEST RESULTS Following are the results of the slip coefficient and tension creep testing of the Jotun Resist 86AV zinc-rich ethyl silicate primer. Slip Coefficient Results Slip Load Data Product Result 1 Result 2 Result 3 Result 4 Result 5 Mean Jotun Resist 86AV 50,400 69,600 61,600 62,000 69,200 62,600 Slip Coefficient Values Product Result 1 Result 2 Result 3 Result 4 Result 5 Mean Jotun Resist 86AV * * Calculated as mean slip load / 2X the clamping force Tension Creep Results Value Assembly 1 Assembly 2 Assembly 3 Initial Micrometer Reading Final Micrometer Reading Creep Deformation (Pass is all specimens <0.005 ) Reload 49 kips* (Pass is Average of three specimens <0.015 ) * Clamping force x design slip COF x 2 If you have any questions concerning the testing or this report, please contact me by telephone at extension 181, or by at cmcgee@kta.com. Very truly yours, KTA-TATOR, INC. Carly McGee Physical Laboratory Supervisor CMM/CLO:kdw Attachment KTA Form T7095A, KTA Form T7095B and Certificate of Testing JN ( Boston Properties.doc) NOTICE: This report represents the opinion of KTA-TATOR, INC. This report is issued in conformance with generally accepted industry practices. While customary precautions were taken to verify the information gathered and presented is accurate, complete and technically correct, this report is based on the information, data, time, materials, and/or samples afforded. This report should not be reproduced except in full.

6 Project No: Client: Jotun Paints Coating Manufacturer: Jotun Paints Coating Name: Resist 86AV Coating Product No. NA Batch No. A: PQ B: Technician A: Carly McGee Technician B: Stanford J. Galloway KTA FORM T7095A COMPRESSION SLIP TEST DATA Set #: 1 Coating Application Date: 4/26/11 Surface Profile (Actual): mils Cure Time (Actual): 24 Hours Cure Conditions: o C and % RH Slip Test Date: 4/27/11 Sheet 1 of 2 A/B C/D Interface Specimen ID Specimen #1 Specimen #2 Specimen #3 Specimen #4 Specimen #5 Test Specimens (3B/9F-9B/7B) (18B/1F-1B/13B) (12B/19F- (14B/20F-20B/2B) (10B/16F-16B/4B) 19B/15F) Test Start Time Clamping Force (49 kips ± 0.5 ) 49.5 kips 49.5 kips 49.5 kips 49.5 kips 49.5 kips Load / Slip at NA NA NA NA NA Displacement Ks (Slip Load) Mean Ks 0.64 Slip load / 2X clamping force = mean slip coefficient of 0.64

7 KTA FORM T7095A COMPRESSION SLIP TEST DATA Sheet 2 of 2 Comments/Observations: Pass Class B Slip Coefficient. Proceed to Tension Creep Test Test Data Reviewed by: Date: July 5, 2011

8 Project No: Client: Jotun Paints Coating Manufacturer: Jotun Paints Coating Name: Resist 86AV Coating Product No. NA Batch No. A: PQ B: Technician A: Carly McGee Technician B: Stanford J. Galloway KTA FORM T7095B TENSION CREEP TEST DATA Set #: 1 Coating Application Date: 4/26/11 Surface Profile (Actual): mils Cure Time (Actual): 24 Hours Cure Conditions: o C and % RH Slip Test Date: 4/27/11 Sheet 1 of 2 A/B C/D Interface Test Start Date 4/27/11 Test End Date 6/8/11 Clamping Force (minimum 49 kips) Bolt #1 Bolt #2 Bolt #3 Average 55.0 kips 54.0 kips 55.0 kips 54.7 kips Specimen ID Specimen #1 Specimen #2 Specimen #3 23B/21F-21B/24B 27B/22F-22B/28B 30B/25F-25B/31B Creep Frame Specimen Load (Locked Tension) 39.2 kips Slip Coefficient Category = Class B (A490 bolts) per Specification for Structural Joints Using High- Strength Bolts, RCSC Micrometer Values (Inches) Specimen # 1 Specimen # 2 Specimen # 3 Date 4/27/ /2/ /4/ /16/ /19/ /25/ /31/ /3/ /8/

9 KTA FORM T7095B TENSION CREEP TEST DATA Sheet 2 of 2 Initial Micrometer Value Average (inches) Final Micrometer Value Average (inches) Final Micrometer Value after Re-Loading of Test Frame to 49 kips (inches) Difference = Creep Deformation (inches) (Not to exceed average for the three specimens) Specimen # 1 Specimen # 2 Specimen # 3 A / B C / D A / B C / D A / B C / D FAIL Creep deformation for all specimens prior to final loading Average Creep deformation following final loading PASS - Creep deformation < for all specimens prior to final loading Average Creep deformation < following final loading Comments/Observations: PASS Creep Deformation. Coating is certified Class B Test Data Reviewed by: Date: July 5, 2011

10 CERTIFICATE OF TESTING This Certificate of Testing signifies that Resist 86AV Zinc-Rich Primer Manufactured by Jotun Paints has been tested by KTA-Tator, Inc. in accordance with the Research Council on Structural Connections (RCSC) Specification for Structural Joints Using High-Strength Bolts (December 31, 2009), Appendix A for: Slip Coefficient and Resistance to Tension Creep And meets the requirements of ASTM A 490, Class B under the following conditions: Batch No. Tested - Part A: PQ Batch No. Tested - Part B: Minimum Cure Time: 24 Hours at o C and 77-83% RH Maximum Dry Film Thickness: 90µm (3.6 mils) Thinner Type: (None) Maximum Thinner Addition: 0% Test Period: April 2011 June 2011 Slip Coefficient Value: 0.64 Carly McGee Physical Test Laboratory Supervisor Cynthia L. O Malley Laboratory Manager KTA-TATOR, INC. 115 TECHNOLOGY DRIVE PITTSBURGH, PENNSYLVANIA 15275