# NTSB Safety Recommendation P-74-039

- **operation:** document
- **citation:** P-74-039
- **title:** NTSB Safety Recommendation P-74-039
- **source type:** guidance
- **agency:** National Transportation Safety Board
- **status:** guidance
- **official:** true
- **published on:** 1974-10-24
- **effective on:** 1974-10-24
- **summary:** THE NTSB RECOMMENDS THAT THE DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT: STUDY THE FLOW OF NATURAL GAS THROUGH VARIOUS BASEMENT WALL AND FLOOR MATERIALS AND THROUGH VARIOUS TYPES OF CONSTRUCTION. THE STUDY SHOULD INCLUDE EFFECTIVE METHODS OF SEALING THE SPACE AROUND UNDERGROUND UTILITY LINES AND DUCTS WHERE THEY ENTER A BUILDING, AND METHODS OF PERMITTING GAS TO ESCAPE IN THE OPEN ATMOSPHERE WHEN CONDUCTED TO THESE 
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- **source url:** https://data.ntsb.gov/carol-main-public/sr-details/P-74-039
**body:**

NTSB safety recommendation P-74-039.

THE NTSB RECOMMENDS THAT THE DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT: STUDY THE FLOW OF NATURAL GAS THROUGH VARIOUS BASEMENT WALL AND FLOOR MATERIALS AND THROUGH VARIOUS TYPES OF CONSTRUCTION. THE STUDY SHOULD INCLUDE EFFECTIVE METHODS OF SEALING THE SPACE AROUND UNDERGROUND UTILITY LINES AND DUCTS WHERE THEY ENTER A BUILDING, AND METHODS OF PERMITTING GAS TO ESCAPE IN THE OPEN ATMOSPHERE WHEN CONDUCTED TO THESE ENTRANCE AREAS.

Priority: CLASS II

Overall Status: Closed - Reconsidered

Issued Date: 1974-10-24

Adopted Date: 1974-10-24

Overall Date Closed: 1995-07-03

Synopsis: ON JUNE 23, 1973, A SERIES OF EXPLOSIONS, FOLLOWED BY FIRE, OCCURRED AT 12321 WELLING LANE IN BOWIE, MARYLAND. THREE OCCUPANTS OF THE HOUSE WERE KILLED, AND A FOURTH WAS INJURED; THE HOUSE WAS BADLY DAMAGED. HOUSES IN A FIVE-BLOCK AREA WERE EVACUATED.

Ntsbnumber: PLD73XR006

Report Number: PAR-74-05

Addressee Name: United States Department of Housing and Urban Development

Addressee Status: Closed - Reconsidered

Addressee Date Closed: 1995-07-03

Addressee Acronym: HUD

Addressee Organization Type: G-Federal Government

Communication Date: 1995-07-03

Communication Type: Official Correspondence

Communication Contents: THE BOARD RECORDS SHOW NO RESPONSE FROM HUB REGARDING THIS RECOMMENDATION & POSSIBLE HUB FUNDING OF SUCH A STUDY TO BE ACHIEVED BY THE NATIONAL BUREAU OF STANDARDS (NOW THE NATIONAL INSTITUTE OF STANDARDS & TECHNOLOGY). IN ADDITION, THIS ISSUE HAS NOT BEEN ADDRESSED IN RECENT ACCIDENTS. THEREFORE, THE BOARD HAS CLASSIFIED P-74-39 "CLOSED-RECONSIDERED."

Addressee Acronym: HUD

Addressee Organization Type: G-Federal Government

Communication Date: 1995-04-27

Communication Type: Official Correspondence

Communication Contents: NO RESPONSE

Addressee Acronym: HUD

Addressee Organization Type: G-Federal Government

Communication Date: 1978-06-27

Communication Type: Official Correspondence
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- **body characters:** 1953