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Safety Recommendation Details

Safety Recommendation I-90-004
Details
Synopsis: ABOUT 11:30 A.M., ON NOVEMBER 30, 1988, A TRACTOR-FLATBED SEMITRAILER OPERATED BY HY YIELD BROMINE COMPANY OVERTURNED AT THE INTERSECTION OF TWO FARM ROADS IN A SPARSELY POPULATED AREA OF COLLIER COUNTY, FLORIDA. THE SEMITRAILER WAS LOADED WITH 32 CYLINDERS OF A POISONOUS AND TOXIC BY INHALATION MIXTURE, 98 PERCENT METHYL BROMIDE AND 2 PERCENT CHLOROPICRIN. ELEVEN OF THE CYLINDERS WERE FULL, EACH CONTAINING ABOUT 1,500 POUNDS OF THE POISONOUS MIXTURE, AND THE REMAINDER OF THE CYLINDERS WERE PARTIALLY FULL OR EMPTY EXCEPT FOR RESIDUE. THE DRIVER HAD COMPLETED THE SECOND OF FOUR SCHEUDLES STOPS WHEN THE ACCIDENT OCCURRED.
Recommendation: THE NTSB RECOMMENDS THAT THE MANCHESTER TANK AND EQUIPMENT COMPANY, INC.: MODIFY THE DESIGN OF ATTACHMENTS TO DEPARTMENT OF TRANSPORTATION SPECIFICATION CYLINDERS TO REDUCE TO A MINIMUM THE RISK OF AN ATTACHMENT PUNCTURING OTHER CYLINDERS DURING TRANSPORTATION.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Intermodal
Location: Collier County, FL, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA89MZ001
Accident Reports: ​Puncture of a Cylinder Containing a Mixture of Methyl Bromide and Chloropicrin Following the Overturn of a Tractor/Semitrailer
Report #: HZM-90-01
Accident Date: 11/30/1988
Issue Date: 3/23/1990
Date Closed: 9/25/1990
Addressee(s) and Addressee Status: Manchester Tank and Equipment Company, Inc. (Closed - Acceptable Action)
Keyword(s): Hazmat

Safety Recommendation History
From: NTSB
To: Manchester Tank and Equipment Company, Inc.
Date: 9/25/1990
Response:

From: Manchester Tank and Equipment Company, Inc.
To: NTSB
Date: 5/16/1990
Response: ON THE PREMISE THAT THE CYLINDER PUNCTURED IN THIS ACCIDENT WAS CAUSED BY A SHARP PROTRUSION FROM ANOTHER SIMILAR MANCHESTER CYLINDER, IT MAY BE FROM THE HORIZONTAL SADDLE BRACKET OF WHICH THERE ARE TWO. THE SQUARE CORNERS ON THIS PIECE OF 3/4-INCH THICK STEEL HAVE BEEN CHANGED TO INCLUDE A 1/2-INCH RADIUS ON THE ENGINEERING DRAWING. THUS, ALL FUTURE CYLINDERS WILL HAVE THIS FEATURE INCORPORATED.