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Safety Recommendation Details

Safety Recommendation R-95-019
Details
Synopsis: ON 6/6/94, A CONDUCTOR FOR THE NORFOLK SOUTHERN RAILWAY COMPANY DETECTED PRODUCT LEAKING FROM THE BOTTOM OF TANK CAR UTLX 79211 IN THE NORFOLK SOUTHERN HARRY DEBUTTS YARD IN CHATTANOOGA, TENNESSEE. THE TANK CAR CONTAINED 12,184 GALLONS OF A 75-PERCENT CONCENTRATION OF ARSENIC ACID, WHICH IS CLASSIFIED AS A POISONOUS MATERIAL & ALSO DESIGNATED AS A MARINE POLLUTANT UNDER THE DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS.
Recommendation: THE NTSB RECOMMENDS THAT THE ASSOCIATION OF AMERICAN RAILROADS: ASSIST THE FRA WITH THE EVALUATION OF FAILURE RATE & MODE OF FAILURE OF BOWL-SHAPED SUMPS & EDUCTION PIPE BRACING SYSTEMS IN TANK CARS TRANSPORTING HAZARDOUS MATERIALS.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Railroad
Location: Chattanooga, TN, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA94SZ011
Accident Reports: ‚ÄčTank Car Failure and Release of Arsenic Acid
Report #: HZM-95-01
Accident Date: 6/6/1994
Issue Date: 3/2/1995
Date Closed: 7/13/1998
Addressee(s) and Addressee Status: Association of American Railroads (Closed - Acceptable Action)
Keyword(s): Hazmat

Safety Recommendation History
From: NTSB
To: Association of American Railroads
Date: 7/13/1998
Response: The Safety Board notes that the AAR Tank Car Committee amended the specifications in the AAR's Manual of Standards and Recommended Practices, Specifications for Tank Cars, Specification M-1002 in October 1997 for eduction pipes and bowl-shaped sumps. The Safety Board also notes that the amended specifications apply to all pressure and non-pressure tank cars, with or without interior coatings or linings, and require that (1) eduction pipes and guides must be designed and installed to prevent contact with the tank shell, sump, or interior coating/lining and that (2) whenever an eduction pipe is removed from a tank car, a procedure must be in place to identify the eduction tube and to ensure its proper orientation and fit when reinstalled. The amendments should ensure that eduction pipes are properly designed and installed in all tank cars. Therefore Safety Recommendation R-95-19 is classified "Closed--Acceptable Action."

From: Association of American Railroads
To: NTSB
Date: 11/18/1997
Response:

From: NTSB
To: Association of American Railroads
Date: 4/24/1995
Response: THE BOARD NOTES THAT THE AAR HAS PLEDGED TO WORK WITH FRA IN THIS EFFORT. WE LOOK FORWARD TO RECEIVING THE RESULTS OF THIS EVALUTION. PENDING ITS COMPLETION, R-95-19 IS CLASSIFIED "OPEN--ACCEPTABLE RESPONSE."

From: Association of American Railroads
To: NTSB
Date: 3/10/1995
Response: THE AAR & MEMBER ROADS ARE READY TO ASSIST THE FRA.