This presentation details the results of a field study conducted in July in Santa Cruz, California, where thirteen participants employed terrestrial laser scanning (TLS) to assess concrete tolerance on a construction site. The study aimed to establish the precision of TLS as a test method for verifying concrete tolerance in accordance with ASTM E-691-23. Additionally, it sought to quantify the bias of the TLS method by comparing the results to reference values obtained using a total station, the accepted standard method as per ASTM E177-20. By evaluating the performance of TLS against established standards and reference measurements, this study contributes valuable insights into the potential of TLS as a tool for concrete tolerance verification in the construction industry.