# Maryland Public Service Commission — Pipeline Safety Interpretation - **operation:** document - **citation:** PI-72-025 - **title:** Maryland Public Service Commission — Pipeline Safety Interpretation - **source type:** guidance - **agency:** Pipeline and Hazardous Materials Safety Administration - **status:** guidance - **official:** true - **published on:** 1972-07-11 - **effective on:** Not available - **summary:** PI-72-025 response to Maryland Public Service Commission concerning 192.457. - **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-72-025.json - **markdown:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-72-025.md - **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-72-025 - **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1972/PI72025.pdf **body:** <<>> July 11, 1972 Mr. Charles C. Constantine Executive Secretary Maryland Public Service Commission 301 West Preston Street Baltimore, Maryland 21201 Dear Mr. Constantine: This will acknowledge receipt of Case No. 6533 by the Maryland Public Service Commission granting a waiver to Washington Gas Light Company and the Baltimore Gas and Electric Company, from the requirements of Section 192.59(a)(1), Section 192.457(b), and Section 192.465(e) of Title 49 of the Code of Federal Regulations. The Office of Pipeline Safety does not object to the granting of these waivers if the following conditions are included: 1. The epoxy Epi-seal formulation is used as a pipeline liner consistent with the method contained in Patent No. 3,211,573, dated October 12, 1965, entitled "Plastic Lining of Pipe." 2. The waiver terminates after three years. 3. The Baltimore Gas and Electric Company and the Washington Gas Light Company will submit a report to the Maryland Public Service Commission 3 months before the waiver termination regarding the success or failure of this type of pipeline rehabilitation with a copy to the Office of Pipeline Safety. We trust that these conditions to the granting of the waiver will meet with your approval. If you have any questions regarding this matter, please let us know. Sincerely, Joseph C. Caldwell Director Office of Pipeline Safety dal\192\457\72-07-11 1 - **truncated:** false - **body characters:** 1398