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SCOPE OF ACCREDITATION TO ISO/IEC 17025:2005 GORRONDONA & ASSOCIATES, INC. 11710 North Freeway, Suite 700 Houston, TX 77060 Chuck Salsky Phone: 281 469 3347

Valid To: October 31, 2012

Certificate Number: 2718.01

In recognition of the successful completion of the A2LA evaluation process, accreditation is granted to this laboratory for: CONSTRUCTION MATERIALS ENGINEERING ASTM: E329 (Agencies Engaged in Construction Inspection and/or Testing); C1077 (Laboratories Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Laboratory Evaluation); D3666 (Agencies Testing and Inspecting Road and Paving Materials); D3740 (Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction) CONSTRUCTION MATERIALS TESTING Test Method: Aggregates: ASTM C29 ASTM C40 ASTM C117 ASTM C127 ASTM C128 ASTM C136 ASTM C566 ASTM C702 ASTM D75* Tex-400-A* Tex-401-A Tex-403-A Tex-404-A Tex-406-A Tex-409-A Test Description: Bulk Density ("Unit Weight") and Voids in Aggregate Organic Impurities in Fine Aggregates for Concrete Materials Finer than 75-m (No. 200) Sieve in Mineral Aggregates by Washing Density, Relative Density (Specific Gravity), and Absorption of Coarse Aggregate Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate Sieve Analysis of Fine and Coarse Aggregates Total Evaporable Moisture Content of Aggregate by Drying Reducing Samples of Aggregate to Testing Size Sampling Aggregates Sampling Flexible Base, Stone, Gravel, Sand, and Mineral Aggregates Sieve Analysis of Fine and Coarse Aggregate Saturated Surface-Dry Specific Gravity and Absorption of Aggregates Determining Unit Mass (Weight) of Aggregates Material Finer Than 75 µm (No. 200) Sieve in Mineral Aggregates (Decantation Test for Concrete Aggregates) Free Moisture and Water Absorption in Aggregate for Concrete

(A2LA Cert. No. 2718.01) Revised 08/22/2012

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Test Method: Concrete: ASTM C31/C31M* ASTM C39/C39M ASTM C42/C42M ASTM C138/C138M* ASTM C143/C143M* ASTM C172/C172M* ASTM C173* ASTM C192/C192M ASTM C231/C231M* ASTM C495 ASTM C567* ASTM C617 ASTM C1064/C1064M* ASTM C1231/C1231M Tex-407-A* Tex-414-A* Tex-415-A* Tex-416-A* Tex-417-A* Tex-418-A Tex-422-A Tex-450-A Fireproofing: ASTM E605* ASTM E736* Masonry: ASTM C109/C109M (Compressive Strength Only) ASTM C1019* Tex-442-A Soils: ASTM D421 ASTM D422 ASTM D558 ASTM D698 ASTM D854 ASTM D1140 ASTM D1557 ASTM D1633 ASTM D2216 ASTM D2217-85(1998) (Withdrawn)

Test Description: Making and Curing Concrete Test Specimens in the Field Compressive Strength of Cylindrical Concrete Specimens Obtaining and Testing Drilled Cores and Sawed Beams of Concrete Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete Slump of Hydraulic-Cement Concrete Sampling Freshly Mixed Concrete Air Content of Freshly Mixed Concrete by the Volumetric Method Making and Curing Concrete Test Specimens in the Laboratory Air Content of Freshly Mixed Concrete by the Pressure Method Compressive Strength of Lightweight Insulating Concrete Determining Density of Structural Lightweight Concrete Capping Cylindrical Concrete Specimens Temperature of Freshly Mixed Hydraulic-Cement Concrete Unbonded Caps in Determination of Compressive Strength of Hardened Concrete Cylinders Sampling Freshly Mixed Concrete Air Content of Freshly Mixed Concrete by the Volumetric Method Slump of Hydraulic Cement Concrete Air Content of Freshly Mixed Concrete by the Pressure Method Unit Weight, Yield, and Air Content (Gravimetric) of Concrete Compressive Strength of Cylindrical Concrete Specimens Measuring Temperature of Freshly Mixed Portland Cement Concrete Capping Cylindrical Concrete Specimens Thickness and Density of Sprayed Fire-Resistive Material (SFRM) Applied to Structural Members Cohesion/Adhesion of Sprayed Fire-Resistive Materials Applied to Structural Members Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens) Sampling and Testing Grout Determining Compressive Strength of Grouts Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants Particle-Size Analysis of Soils Moisture-Density (Unit Weight) Relations of Soil-Cement Mixtures Laboratory Compaction Characteristics of Soil Using Standard Effort Specific Gravity of Soil Solids by Water Pycnometer Amount of Material in Soils Finer than No. 200 (75-m) Sieve Laboratory Compaction Characteristics of Soil Using Modified Effort Compressive Strength of Molded Soil-Cement Cylinders Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass Wet Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants Page 2 of 3

(A2LA Cert. No. 2718.01) Revised 08/22/2012

Test Method: ASTM D2487

Test Description:

Classification of Soils for Engineering Purposes (Unified Soil Classification System) Description and Identification of Soils (Visual-Manual Procedure) ASTM D2488* ASTM D2922-05 (Withdrawn)* Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth) ASTM D3017-05 (Withdrawn)* Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth) Classification of Soils and Soil-Aggregate Mixtures for Highway ASTM D3282 Construction Purposes Liquid Limit, Plastic Limit, and Plasticity Index of Soils ASTM D4318 Unit Weight and Water Content for Soils Containing Oversize ASTM D4718 Particles Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis ASTM D6913 ASTM D6938* In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth) Tex-103-E Determining Moisture Content in Soil Materials Tex-104-E Determining Liquid Limits of Soils Tex-105-E Determining Plastic Limit of Soils Tex-106-E Calculating the Plasticity Index of Soils Tex-108-E Determining the Specific Gravity of Soils Tex-110-E Particle Size Analysis of Soils Tex-111-E Determining the Amount of Material in Soils Finer than the 75 m (No. 200) Sieve NOTE: This laboratory's scope contains withdrawn or superseded methods. As a clarifier, this indicates that the applicable method itself has been withdrawn or is now considered "historical" and not that the laboratory's accreditation for the method has been withdrawn.

Laboratories for these tests.

* This laboratory meets A2LA R104 ­ General Requirements: Accreditation of Field Testing

(A2LA Cert. No. 2718.01) Revised 08/22/2012

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A2LA has accredited

GORRONDONA & ASSOCIATES, INC.

Houston, TX

for technical competence in the field of

Construction Materials Testing

This laboratory is accredited in accordance with the recognized International Standard ISO/IEC 17025:2005 General Requirements for the Competence of Testing and Calibration Laboratories. This accreditation demonstrates technical competence for a defined scope and the operation of a laboratory quality management system (refer to joint ISO-ILAC-IAF Communiqué dated 8 January 2009).

Presented this 20th day of December 2010.

_______________________

President & CEO For the Accreditation Council Certificate Number 2718.01 Valid to October 31, 2012 Revised August 22, 2012

For the tests which this accreditation applies, please refer to the laboratory's Construction Materials Scope of Accreditation.

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