# Regulus search export

- Query: `54 FR 24361`
- Source type: All
- Part: All
- Source: All
- Status: All
- Jurisdiction: All
- Collection: All
- Incident class: All
- Sort: relevance
- Date from: Any
- Date to: Any
- As of: Current corpus
- Results: 3
- Exported: 2026-08-24T21:22:09.490Z

## 1. NTSB Safety Recommendation P-88-001

**Citation:** P-88-001  
**Type / status:** guidance / guidance  
**Agency:** National Transportation Safety Board  
**Effective / published:** 1988-05-10 / 1988-05-10

THE NTSB RECOMMENDS THAT THE RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION: ESTABLISH, BASED ON KNOWN TOXICOLOGICAL DATA, A MAXIMUM ALLOWABLE CONCENTRATION OF HYDROGEN SULFIDE IN NATURAL GAS PIPELINE SYSTEMS, AND AMEND 49 CFR PART 192 TO REFLECT THIS DETERMINATION.

### Provenance

- Official: Yes
- Source: <https://data.ntsb.gov/carol-main-public/sr-details/P-88-001>
- Source ID: `ntsb-pipeline`
- SHA-256: `2f4f46cb157e4feb6f9724ad80e690a4c137d9541ad2743dad23c09112ea7c2d`
- Retrieved: 2026-08-20T04:57:24.741Z
- Document slug: `ntsb-recommendation-p-88-001`
- Related records: 1

## 2. NTSB Safety Recommendation P-88-002

**Citation:** P-88-002  
**Type / status:** guidance / guidance  
**Agency:** National Transportation Safety Board  
**Effective / published:** 1988-05-10 / 1988-05-10

THE NTSB RECOMMENDS THAT THE RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION: REVISE 49 CFR PART 191 TO REQUIRE THAT PIPELINE OPERATORS REPORT ALL INCIDENTS IN WHICH CONCENTRATIONS OF HYDROGEN SULFIDE IN EXCESS OF THE MAXIMUM ALLOWABLE CONCENTRATION ARE INTRODUCED INTO PIPELINE SYSTEMS THAT TRANSPORT NATURAL GAS INTENDED FOR DOMESTIC OR COMMERCIAL PURPOSES.

### Provenance

- Official: Yes
- Source: <https://data.ntsb.gov/carol-main-public/sr-details/P-88-002>
- Source ID: `ntsb-pipeline`
- SHA-256: `03ed71f352af5273be80d0f1397d09a7c4c7fc1fd1739ad10275535445c4a5d9`
- Retrieved: 2026-08-20T04:57:24.741Z
- Document slug: `ntsb-recommendation-p-88-002`
- Related records: 1

## 3. NTSB Safety Recommendation P-88-003

**Citation:** P-88-003  
**Type / status:** guidance / guidance  
**Agency:** National Transportation Safety Board  
**Effective / published:** 1988-05-10 / 1988-05-10

THE NTSB RECOMMENDS THAT THE RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION: REQUIRE GAS PIPELINE OPERATORS TO INSTALL ON THEIR SYSTEMS EQUIPMENT CAPABLE OF AUTOMATICALLY DETECTING AND SHUTTING OFF THE FLOW OF GAS WHEN THE MAXIMUM ALLOWABLE CONCENTRATIONS OF HYDROGEN SULFIDE-CONTAMINATED GAS ARE EXCEEDED.

### Provenance

- Official: Yes
- Source: <https://data.ntsb.gov/carol-main-public/sr-details/P-88-003>
- Source ID: `ntsb-pipeline`
- SHA-256: `1238cdfe43384e7a40114b87f8e80fc96511aaf1001cf6627e7c657b7c949726`
- Retrieved: 2026-08-20T04:57:24.741Z
- Document slug: `ntsb-recommendation-p-88-003`
- Related records: 1