Research a letter of Interpretation on the PHMSA website (ht…

Research a letter of Interpretation on the PHMSA website (https://www.phmsa.dot.gov/regulations-and-compliance) submitted by Mr. Gary J. Garrahan Environmental Engineer, Digital Audio Disc Corporation. Write a brief summary of his question and the response he received from the Assistant Chief Council for Hazardous Materials Safety. If this website (https://www.phmsa.dot.gov/regulations-and-compliance) is not working, you can Google search this: Mr. Gary J. Garrahan Environmental Engineer, Digital Audio Disc Corporation