Twin Ports Testing (TPT) was founded in 1972 in Duluth, Minnesota, with the initial objective of testing pipeline welds and bends. Since then they have dramatically expanded their capabilities to include comprehensive nondestructive testing and nondestructive evaluation services as well as geotechnical engineering, construction materials testing, environmental consulting, industrial hygiene and industrial chemistry laboratory services. The expansion of TPT through the addition of these services has enabled their involvement in projects from the initial developmental stages through completion. For over four decades, TPT has provided quality inspection, consulting, and testing services to clients throughout the Upper Midwest, and regions beyond. The accuracy, reliability and cost-effectiveness of their services have earned Twin Ports Testing an excellent reputation.