Precision Granite

(A2LA Cert. No. 1679.01) 1/12/2026 Page 1 of 2 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 PRECISION GRANITE 353 Plunkett Creek Rd Gordonsville, TN 38563 Darren Smith Phone: 615 604 5673 prgranite@yahoo.com CALIBRATION Valid To: February 29, 2028 Certificate Number: 1679.01 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 to perform the following calibrations 1: I. Dimensional Parameter/Equipment Range CMC2 (±) Comments Surface Plates3 – Flatness Repeat Reading (8 × 12) in to (10 × 10) ft 0.002 in 5.0 µin/ft 20 µin GGGP 463c Autocollimator Note: CMC is to be no less than the acceptable closure error for the procedure Repeat-o-meter – only valid in connection with a flatness calibration _____________________________________ 1 This laboratory offers commercial and field calibration service only. 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 expanded 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.

(A2LA Cert. No. 1679.01) 1/12/2026 Page 2 of 2 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.