TxDOT Standard Specifications (Item 6.10 Hazardous Materials) addresses hazardous materials discovered on sites that are owned or controlled by the State. Per Item 6.10, materials used in the project shall be free of any hazardous materials. The Engineer should be notified immediately if any materials are suspected of containing hazardous materials.

Item 6.10 also discusses the responsibilities for existing materials and materials delivered to the project containing hazardous materials. For existing materials, the State is responsible for testing and removal and the Engineer may suspend work. For materials delivered, the contractor is responsible for testing and removal.