W. Va. Code § 21-1D-7: Drug-free workplace records and contents open for inspection.

Every contractor shall keep an accurate record showing the names, occupation and safety-sensitive status of all employees, in connection with the construction on the public improvement, and showing any drug tests or alcohol tests performed and employee education and supervisor training received, which record shall be open at all reasonable hours for inspection by the public authority which let the contract and its officers and agents. It is not necessary to preserve the record for a period longer than three years after the termination of the contract.