Document mqenGY7oxV3J9NErazDLjpXXB

Vista Polymers Inc. A Subsidiary of Vista Chemical Company Highway 25 Post Office Box 91 Aberdeen, Mississippi 39730 Phone {601} 369-8111 A September 11, 1984 Mr. Jerry B. Banks Mississippi Department of Natural Resources Bureau of Pollution Control P. 0. Box 10385 Jackson, MS 39204 Dear Mr. Banks: This letter will confirm our conversation of September 10, 1984 at 10:45 a.m. I informed you of a leak that occurred at 11:10 a.m. on September 9, 1984. Prior to reactor D-300 being charged, the reactor was pressured up to about 10 - 15 PSIG with VCM gas in accordance with plant operating procedures. The outside operator checked the reactor and since everything looked normal, he instructed the panel operator to proceed with the charge. The out side operator then walked across the recovery structure and heard a noise that sounded like an air leak. As he walked back to the reac tor, he thought there might be a problem and radioed to the panel operator to stop charge. The panel operator immediately stopped charging on the reactor, noting that no additional VCM was added to the reactor since the initial amount. The outside operator and chief lead operator immediately discovered that the cause of the noise was from the reactor atmospheric vent valve. The valve was immediately closed and the leak stopped. The connector between the actuator and the valve had worn and the valve was slightly cracked open, even though the indicator light on the panel indicated closed. The valve connector was then repaired before the reactor was returned to service. If you have any questions, please call me at 601-369-8111. Veldon E. Messick Senior Process Engineer bis VAB.0001215209 i.. [... Kh -4 To: File Interoffice Communication From: Date: Subject: V. E. Messick September 11, 1984 LEAK REPORT TO STATE VKIA On September 10, 1984 at 10:45 a.m. , I called Jerry Banks to inform him of a leak that occurred at the plant at about 11:10 cl mm.m on September 9, 1984. I told him that prior to reactor D-300 being charged, the reactor was pressured up to about 10-15 PSIG with VCM as is the plant operating procedure. The outside operator checked the reactor and since everything looked normal, he instructed the panel operator to proceed with the charge. The outside operator then walked across the recovery structure and heard a noise that sounded like an air line leak. As he walked back to the reactor, he thought there might be a problem and radioed to the panel operator to stop charge. The panel operator immediately stopped charging and began recovery on the reactor, noting that no additional VCM was added to the reactor since the small initial amount. The outside operator and chief lead operator immediately discovered that the cause of the noise was from the reactor atmospheric vent valve stack. The valve was immediately closed and the leak stopped. The connector between the actuator and the valve had worn and the valve was slightly cracked open even though the indicator light on the panel indicated closed. The valve connector was then repaired before the reactor was returned to service. Jerry told me thanks and asked no questions. Veldon E. Messick Senior Process Engineer bis c: JF, JWW, RAF, DWH VAB.0001215210 t J + k i. i V4 I * j* f VAB.0001215211 t^ r i | .M- "'I H k..^,. , hy i- Ii