Troxler Electronic Laboratories, Inc.

(A2LA Cert. No. 3260.01) 01/29/2026 Page 2 of 8 Parameter/Equipment Range CMC2 (±) Comments Locations6 Calibration of Angle Measurement System of the Gyratory Compactor Using the RAM3 (1.0 to 1.3)° 2.1 x 10-2 ° RAM RTP, HOU, ORL Gyratory Compactor Mold Internal Diameter3 (149.0 to 151.0) mm 1.0 x 10-2 mm Bore micrometer RTP, HOU, ORL, RAN Gyratory Compactor Ram Head and End Plate External Diameter3 (149.0 to 150.0) mm 1.8 x 10-2 mm External micrometer RTP, HOU, ORL, RAN Gyratory Compactor Mold Height (245.0 to 255.0) mm 0.015 mm CMM RTP Gyratory Compactor Mold Wall Thickness (7.0 to 8.0) mm 0.13 mm CMM, bore micrometer RTP Gyratory Compactor Mold Inside Surface, Ram Head and End Plate Surface Rq Value Up to 5.00 µm 0.20 µm Surface texture tester RTP AFLS1 Rapid Internal Angle Measurement Calibration Tube, Dihedral Angle (1.0 to 1.3)° 1.0 x 10-2 ° CMM RTP Concrete Type B Air Meter Measurement Bowl Volume (0.20 to 0.30) ft3 8.8 x 10-3 % Air in Concrete Equivalent water volume ORL, FMY Concrete Type B Air Meter Measurement Bowl Diameter-to- Height Ratio 0.75 to 1.25 3.9 x 10-5 Caliper, depth gauge ORL, FMY

(A2LA Cert. No. 3260.01) 01/29/2026 Page 4 of 8 Parameter/Equipment Range CMC2, 4 (±) Comments Location6 Water Mass Per Unit Volume – Secondary Moisture Blocks (370 to 823) kg/m3 4.4 % rdg Master gauge RTP Water Mass Per Unit Volume – Tertiary Moisture Blocks3 (555 to 615) kg/m3 3.9 % rdg Master gauge RTP, HOU, ORL, RAN, FMY 7 Water Mass Per Unit Volume – Troxler Tracker Portable Nuclear Gauge Calibration System 3 (110 to 375) kg/m 3 6.8 % rdg Master gauge RTP, ORL Master Gauge Calibration, Density Measurement System (1760 to 2725) kg/m3 0.11 % rdg Primary density blocks RTP Master Gauge Calibration, Water Mass Per Unit Volume Measurement System (373 to 804) kg/m3 4.0 % rdg Secondary water blocks RTP Client Surface Moisture/Density Nuclear Gauges, Density Measurement System 3 – Backscatter Other Positions (1740 to 2626) kg/m 3 (1740 to 2626) kg/m 3 1.3 % rdg (1.3 x 10 -5D2 – 0.0048D + 0.70) % rdg Secondary density blocks RTP, HOU, ORL, RAN, FMY 7

(A2LA Cert. No. 3260.01) 01/29/2026 Page 5 of 8 Parameter/Equipment Range CMC2, 4 (±) Comments Location6 Client Surface Moisture/Density Nuclear Gauges, Density Measurement System3 – Backscatter Other Positions (1850 to 2550) kg/m 3 (1740 to 2620) kg/m3 1.3 % rdg (-2.3 x 10 -3D + 1.8) % rdg Troxler tracker portable nuclear gauge calibration system RTP, ORL Client Surface Moisture/Density Nuclear Gauges, Moisture System 3 (0 to 615) kg/m3 5.1 % rdg Tertiary moisture blocks RTP, HOU, ORL, RAN, FMY 7 Client Surface Moisture/Density Nuclear Gauges, Moisture System 3 (0 to 375) kg/m3 4.1 % rdg Troxler tracker portable nuclear gage calibration system RTP, ORL Client Thin Layer Density Nuclear Gauges3 – For Low Density Top Layer, High Density Bottom Layer For High Density Top Layer, Low Density Bottom Layer Density: (1740 to 2585) kg/m 3 Top Layer Thickness: (25.4 to 101.6) mm Density: (1740 to 2585) kg/m 3 Top Layer Thickness: (25.4 to 101.6) mm (0.0020T 2 – 0.18T + 7.8) % rdg (-0.0012T 2 + 0.095T – 0.21) % rdg Secondary density blocks and primary thin layer plates RTP, HOU, ORL, RAN, FMY 7 Calibration of Load Cell for Gyratory Compactor Pressure Calibration (790 to 5010) lbf 7.1 lbf Master load cell RTP

(A2LA Cert. No. 3260.01) 01/29/2026 Page 7 of 8 Parameter/Equipment Range CMC2 (±) Comments Location6 Percent Air Content – Concrete Volume Divided by Measuring Bowl Volume (0 to 15) % Air 0.070 % Air Thermometer, scale ORL, FMY Ratio of Calibrated Cup Volume Divided by Measuring Bowl Volume 1 % ± 0.04 % of the Volume of the Measuring Bowl 0.0058 % rdg Thermometer, scale ORL, FMY Ratio of the Meter Top Section Volume Divided by Measuring Bowl Volume Ratio ≥ 1.2 0.0019 rdg Thermometer, scale ORL, FMY Ratio of Measuring Bowl Diameter Divided by Measuring Bowl Height Ratio ≥ 1 But Less Than or Equal to 1.25 0.040 rdg Thermometer, scale, bore micrometer ORL, FMY ____________________ 1 This laboratory offers commercial calibration service and field calibration service. 2 Calibration and Measurement Capability Uncertainty (CMC) is the smallest uncertainty of measurement that a laboratory can achieve within its scope of accreditation when performing more or less routine calibrations of nearly ideal measurement standards or nearly ideal measuring equipment. CMCs represent ex panded uncertainties expressed at approximately the 95 % level of confidence, usually using a coverage factor of k = 2. The actual measurement uncertainty of a specific calibration performed by the laboratory may be greater than the CMC due to the behavior of the customer’s device and to influences from the circumstances of the specific calibration. 3 Field calibration service is available for this calibration. Please note the actual measurement uncertainties achievable on a customer's site can normally be expected to be larger than the CMC found on the A2LA Scope. Allowance must be made for aspects such as the environment at the place of calibration and for other possible adverse effects such as those caused by transportation of the calibration equipment. The usual allowance for the actual uncertainty introduced by the item being calibrated, (e.g. resolution) must also be considered and this, on its own, could result in the actual measurement uncertainty achievable on a customer’s site being larger than the CMC. 4 In the statement of CMC, D is the nuclear gauge measurement depth in millimeters, and T is the top layer thickness in millimeters. 5 This scope meets A2LA’s P112 Flexible Scope Policy.