A cooling basin constructed as an addition to an existing co-generation cooling system consisted of cast-in-place concrete with walls approximately 60 ft. tall. Shortly after the cooling basin was constructed, the owner expressed concerns that the basin was leaking. CA was retained to observe the repairs performed to the basin walls by a third party hired and to certify that all repairs were performed according to industry standards of practice. CA’s activities included numerous site visits, non-destructive testing, evaluation of existing conditions, and observed on-site testing by other parties. CA provided the client with additional repair options and procedure recommendations.