Aldinger Company dba CALSER Calibrations

Part 1 of 6

(A2LA Cert. No. 7863.01) 4/17/2026 Page 1 of 5 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 ALDINGER COMPANY DBA CALSER CALIBRATIONS110 E 6 th Street P.O. Box 91 Saint Jacob, IL, 62281 Brett Bohannon Phone: 208-860-3981 CALIBRATION Valid To: December 31, 2026 Certificate Number: 7863.01 In recognition of the successful completion of the A2LA evaluation process (including an assessment of the organization’s compliance with R205 – A2LA’s Calibration Program Requirements) accreditation is granted to this laboratory at the location listed above as well as the satellite laboratory location listed below to perform the following calibrations 1, 6: I. Dimensional Parameter/Equipment Range CMC2, 4 (±) Comments Indicators & LVDTs3 (0.05 to 10) in (40 + 14 L) μin Guage blocks, ASME B89.1.10M Calipers3 (0.05 to 24) in (11 + 14 L) μin Guage blocks, ASME B89.1.14 Micrometers3 (0.05 to 24) in (5.4 + 19 L) μin Guage blocks, ASME B89.1.13 Rulers3 (0.031 25 to 24) in 0.003 in Standardized ruler, NIST SOP10 Extensometer3 (0.025 to 2) in (6.9 + 48 L) μin 3590VHR, ASTM E83 Displacement Measurement System3 (0.05 to 8) in 170 μin Digital indicator (w/ guage blocks) ASTM E2309

Part 2 of 6

(A2LA Cert. No. 7863.01) 4/17/2026 Page 2 of 5 Parameter/Equipment Range CMC2 (±) Comments Gyratory Compactors3 Height Tube Height Blocks Internal Angle Up to 120 mm Up to 254 mm Up to 1.30° 0.01 mm 0.01 mm 0.011° Height tube Height block Angle measurement device Gyratory & Proctor Molds 3 Up to 200 mm 0.007 mm Mitutoyo three- point bore guage Gyratory Mold Plates3 Up to 200 mm 0.003 mm Outside micrometer Feeler Gages3 (0.001 to 0.1) in 84 μin Micrometer Parallel Bars3 Up to 24 in 44 μin Parallel bar, stand, feeler guage II. Mechanical Parameter/Equipment Range CMC2, 4, 5 (±) Comments Scales3 1 g to 1 kg (1 to 40) kg (1 to 100) lb (100 to 200) lb (2.5 x 10-3 + 1.1 x 10-4 Wt) g (-3.0 x 10-2 + 1.5 x 10-4 Wt) g (1.1 x 10 -3 + 1.1 x 10-4 Wt) lb (-2.0 x 10-4 + 1.2 x 10-4 Wt) lb NIST Class 5 & 6 weights, ASTM E898 Force/Compression Testing Machines, Load Cells, & Load Rings 3 (20 to 1000) lbf (200 to 10 000) lbf (10 000 to 100 000) lbf (100 000 to 1 000 000) lbf 0.02 % 0.01 % 0.02 % 0.01 % Load cell (w/ digital readout systems)

Part 3 of 6

(A2LA Cert. No. 7863.01) 4/17/2026 Page 3 of 5 Parameter/Equipment Range CMC2, 5 (±) Comments Gyratory Compactors – Pressure3 (1500 to 18 000) N 2.4 N Proving ring load cells Torque Wrenches3 Up to 9 lbf∙in (9 to 90) lbf∙in (100 to 1000) lbf∙in (20 to 200) lbf∙ft (200 to 2000) lbf∙ft 0.46 % 0.71 % 0.38 % 0.046 % 0.075 % ASME B107.28 Huanyu HP-10 Huanyu HP-100 CDI 10002-I-ETT AKO TSD111/200 AKO TSD111 Vacuum System & Vacuum Gages3 (0.52 to 760) mmHg 0.087 mmHg Transducer based pressure measuring equipment, USBR 1050, ASME B40.100 Pressure Gages3 (-14.5 to 300) psi (200 to 1000) psi (1000 to 5000) psi (2000 to 10 000) psi 0.022 % + 0.074 psi 0.044 % + 0.41 psi 0.026 % + 0.12 psi 0.03 % + 0.71 psi ASME B40.100 Fluke 2700G Fluke 700G08 Fluke 700G30 Fluke 700G31 Pressure Transducers3 (10 to 300) psi 0.3 psi Transducer based pressure measuring equipment, USBR 1050 Concrete Air Meter – Pressure Method3 Up to 10% of air in concrete 0.42 % of air in concrete ASTM C231, air meter graduate