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Safety Recommendation Details

Safety Recommendation P-93-006
Details
Synopsis: ON JANUARY 17, 1992, WHILE A CREW FROM PEOPLES GAS LIGHT AND COKE COMPANY (PEOPLES) WAS DOING ROUTINE ANNUAL MAINTENANCE WORK ON A MONITOR REGULATOR AT ONE OF ITS REGULATOR STATIONS, HIGH-PRESSURE GAS ENTERED A LOW-PRESSURE SYSTEM. THE GAS--UNDER AS MUCH AS 10 PSIG OF PRESSURE--ESCAPED THROUGH GAS APPLIANCES INTO HOMES AND OTHER BUILDINGS, WHERE I WAS IGNITED BY SEVERAL UNIDENTIFIED SOURCES. THE RESULTING EXPLOSION AND FIRES KILLED 4 PEOPLE, INJURED 4, AND DAMAGED 14 HOUSES AND 3 COMMERCIAL BUILDINGS.
Recommendation: THE NTSB RECOMMENDS THAT THE AMERICAN GAS ASSOCIATION AND THE AMERICAN PUBLIC GAS ASSOCIATION: INFORM MEMBER COMPANIES OF THE CIRCUMSTANCE OF THIS ACCIDENT AND URGE THEM TO (1) REVIEW AND IMPROVE THEIR EMPLOYEE GUIDANCE AND TRAINING PROGRAMS ON RECOGNIZING AND RESPONDING TO ABNORMAL SITUATIONS, (2) ASSESS THE APPROPRIATENESS OF THEIR PROCEDURES FOR USING BYPASS VALVES TO MAINTAIN PRESSURE CONTROL DURING REGULATOR INSPECTIONS, AND (3) ASSESS THE EFFECTIVENESS OF THEIR PROGRAMS FOR EDUCATING THE PUBLIC ABOUT RECOGNIZING AND RESPONDING TO POTENTIAL GAS EMERGENCIES.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Pipeline
Location: Chicago, IL, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA92MP004
Accident Reports: ‚ÄčOver-Pressure of Peoples Gas Light and Coke Company Low-Pressure Distribution System
Report #: PAR-93-01
Accident Date: 1/17/1992
Issue Date: 1/26/1993
Date Closed: 6/16/1993
Addressee(s) and Addressee Status: American Gas Association (Closed - Acceptable Action)
American Public Gas Association (Closed - Acceptable Action)
Keyword(s): Training and Education, Public Education (Pipeline)

Safety Recommendation History
From: NTSB
To: American Public Gas Association
Date: 6/16/1993
Response: THE BOARD UNDERSTANDS THAT APGA MEMBER COMPANIES WERE NOTIFIED OF THE CIRCUMSTANCES OF THIS ACCIDENT BY YOUR LETTER DATED APRIL 20, 1993, AND THEY WERE URGED TO COMPLY WITH THE INTENT OF THIS RECOMMENDATION. BASED ON THIS INFORMATION, RECOMMENDAITON P-93-6 HAS BEEN CLASSIFIED "CLOSED--ACCEPTABLE ACTION."

From: American Public Gas Association
To: NTSB
Date: 4/20/1993
Response: A COPY OF THE LETTER AND ATTACHMENT THAT WERE SENT TO ALL NATURAL GAS SYSTEMS (964) IN ACCORDANCE WITH NTSB RECOMMENDATION P-93-6 OF JANUARY 26, 1993.

From: NTSB
To: American Gas Association
Date: 5/7/1993
Response: THE BOARD UNDERSTANDS THAT AGA MEMBER COMPANIES WERE NOTIFIED OF THE CIRCUMSTANCES OF THIS ACCIDENT BY LETTER DATED 3/23/93, URGING COMPLIANCE WITH THE INTENT OF THIS RECOMMENDATION. BASED ON THIS INFO, P-93-6 HAS BEEN CLASSIFIED "CLOSED--ACCEPTABLE ACTION."

From: American Gas Association
To: NTSB
Date: 3/23/1993
Response: THE LETTER WE RECENTLY MAILED TO AGA MEMBER COMPANIES TRANSMITTING YOUR RECOMMENDATION AND URGING OUR MEMBERS TO TAKE THE ACTIONS THAT YOU RECOMMEND.