# NTSB Safety Recommendation P-74-047 - **operation:** document - **citation:** P-74-047 - **title:** NTSB Safety Recommendation P-74-047 - **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 NATIONAL FIRE PROTECTION ASSOCIATION: ADVISE FIREFIGHTING PERSONNEL OF THE PHENOMENON OF ADSORPTION OF GAS ODORANT COMPOUNDS BY CERTAIN TYPES OF SOILS. THEY SHOULD BE REMINDED OF THE NEED TO USE COMBUSTIBLE GAS INDICATORS WHEN ATTEMPTS ARE BEING MADE TO DETECT THE PRESENCE OF LEAKING GAS. - **machine formats:** - **json:** https://regulus.evalyn.ai/document/ntsb-recommendation-p-74-047.json - **markdown:** https://regulus.evalyn.ai/document/ntsb-recommendation-p-74-047.md - **app url:** https://regulus.evalyn.ai/document/ntsb-recommendation-p-74-047 - **source url:** https://data.ntsb.gov/carol-main-public/sr-details/P-74-047 **body:** NTSB safety recommendation P-74-047. THE NTSB RECOMMENDS THAT THE NATIONAL FIRE PROTECTION ASSOCIATION: ADVISE FIREFIGHTING PERSONNEL OF THE PHENOMENON OF ADSORPTION OF GAS ODORANT COMPOUNDS BY CERTAIN TYPES OF SOILS. THEY SHOULD BE REMINDED OF THE NEED TO USE COMBUSTIBLE GAS INDICATORS WHEN ATTEMPTS ARE BEING MADE TO DETECT THE PRESENCE OF LEAKING GAS. Priority: CLASS II Overall Status: Closed - Acceptable Action Issued Date: 1974-10-24 Adopted Date: 1974-10-24 Overall Date Closed: 1985-09-03 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: National Fire Protection Association Addressee Status: Closed - Acceptable Action Addressee Date Closed: 1985-09-03 Addressee Acronym: NFPA Addressee Organization Type: A-Associations Communication Date: 1974-12-13 Communication Type: Official Correspondence Communication Contents: LETTER FROM THE NATIONAL FIRE PROTECTION ASSOCIATION: WE WILL PUBLISH A REPORT ON THIS INCIDENT WHICH WILL EMPHASIZE THE POINTS IN THIS RECOMMENDATION. WE HAVE ALREADY EXPANDED OUR TREATMENT OF THE ODORIZATION SITUATION IN THE FORTHCOMING 14TH EDITION OF THE NFPA FIRE PROTECTION HANDBOOK. Addressee Acronym: NFPA Addressee Organization Type: A-Associations Communication Date: 1985-06-20 Communication Type: Official Correspondence Communication Contents: NFPA LTR: IN ACCORDANCE WITH YOUR RECOMMENDATION P-74-47, NFPA HAS: A) PUBLISHED A REPORT OF THE INCIDENT WITH A PHOTOGRAPH IN THE NFPA FIRE JOURNAL, NOVEMBER, 1983. B) EXPANDED THE TREATMENT OF GAS LEAKS AND SPECIFICALLY STATED THAT GAS ODORANTS CAN BE SCRUBBED FROM THE GAS BY SOILS IN THE 14TH EDITION (JANUARY, 1976), THE 15TH EDITION (SEPTEMBER, 1981) AND WILL BE INCLUDED IN THE UPCOMING 16TH EDITION OF THE NFPA FIRE PROTECTION HANDBOOK. Addressee Acronym: NFPA Addressee Organization Type: A-Associations Communication Date: 1985-06-03 Communication Type: Official Correspondence Addressee Acronym: NFPA Addressee Organization Type: A-Associations Communication Date: 1985-09-03 Communication Type: Official Correspondence - **truncated:** false - **body characters:** 2325