# Internal corrosion control: Onshore transmission monitoring and Mitigation

**Citation:** 192.478  
**Type / status:** regulation / current  
**Agency:** Arkansas Public Service Commission  
**Effective:** Not stated  
**Published:** Not stated

§ 192.478 Internal corrosion control: Onshore transmission monitoring and mitigation. (a) Each operator of an onshore gas transmission pipeline with corrosive constituents in the gas being transported must develop and implement a monitoring and mitigation program to mitigate the corrosive effects, a

## Document text

§ 192.478 Internal corrosion control: Onshore transmission monitoring and mitigation. (a) Each operator of an onshore gas transmission pipeline with corrosive constituents in the gas being transported must develop and implement a monitoring and mitigation program to mitigate the corrosive effects, as necessary. Potentially corrosive constituents include, but are not limited to: carbon dioxide, hydrogen sulfide, sulfur, microbes, and liquid water, either by itself or in combination. An operator must evaluate the partial pressure of each corrosive constituent, where applicable, by itself or in combination, to evaluate the effect of the corrosive constituents on the internal corrosion of the pipe and implement mitigation measures as necessary. (b) The monitoring and mitigation program described in paragraph (a) of this section must include: (1) The use of gas-quality monitoring methods at points where gas with potentially corrosive contaminants enters the pipeline to determine the gas stream constituents. (2) Technology to mitigate the potentially corrosive gas stream constituents. Such technologies may include product sampling, inhibitor injections, in-line cleaning pigging, separators, or other technology that mitigates potentially corrosive effects. (3) An evaluation at least once each calendar year, at intervals not to exceed 15 months, to ensure that potentially corrosive gas stream constituents are effectively monitored and mitigated. (c) An operator must review its monitoring and mitigation program at least once each calendar year, at intervals not to exceed 15 months, and based on the results of its monitoring and mitigation program, implement adjustments, as necessary.

## Provenance

- Official: Yes
- Source: <https://codeofarrules.arkansas.gov/Rules/Rule?chapterID=40&levelType=part&partID=1394&subChapterID=392&titleID=23>
- Source ID: `ar-car-pipeline-safety`
- SHA-256: `3354a5c4cbb0749091bae488dcb364376da21af56264539036df3d4f3e6b7954`
- Retrieved: 2026-08-12T08:10:37.612Z
- Exported: 2026-08-23T12:38:22.734Z
- Document slug: `ar-car-23-500-192-478`

### Source metadata

```json
{
  "jurisdiction": "US-AR",
  "subject": "intrastate-gas",
  "caveats": {
    "exactScope": "The searchable corpus contains every current numbered section, the code-wide definitions, and every operative appendix in official 23 CAR Part 500, plus direct pipeline rules 15 CAR sections 275-406 and 275-504. Reserved and removed provisions are inventory-only.",
    "excludedScope": "This is not all Arkansas pipeline law. Standalone statutes, dockets and orders, one-call law, utility rates and service, siting, environmental permits, highway crossings, local law, forms, and incorporated third-party standards are excluded. Other current AOGC gas and transportation rules are inventoried as adjacent production, conservation, storage, or fluid-transport material.",
    "applicabilityCaveat": "APSC administers certified intrastate gas safety downstream of producer custody transfer. AOGC section 275-406 separately reaches specified producer or producer-affiliated natural-gas systems. AOGC section 275-504 imposes state permitting and operational duties on specified hazardous-liquid pipelines, but PHMSA states that it directly inspects and enforces intrastate hazardous-liquid pipeline safety in Arkansas. Inclusion does not establish applicability to a particular facility.",
    "incorporationCaveat": "AOGC sections 275-406 and 275-504 use dynamic 'as amended' wording for federal Parts 190, 191, 192, 195, and 199. Part 500 is a state code that reproduces and modifies federal-derived gas provisions. References and relationship records do not substitute a retrieval-date federal text or decide the legal effect of incorporation.",
    "publicationCaveat": "The Code of Arkansas Rules identifies its online database as the official version, effective as a publication system January 1, 2025, updated weekly, and potentially behind recent agency rulemaking. The official Part 500 page reports Ark. R. 2026-6 effective January 8, 2026; its PDF is headed August 22, 2025 and Docket 25-025-R. Retrieval and site-update dates are publication observations, not inferred legal effective dates for every section.",
    "rights": "Official Arkansas and federal government artifacts are archived with attribution and SHA-256 provenance. Public access does not settle rights in seals, site presentation, forms, incorporated standards, or third-party material; downstream redistribution requires separate review."
  },
  "rightsReviewRequired": true,
  "references": [],
  "codePart": "23 CAR pt. 500",
  "partEffectiveOn": "2026-01-08",
  "partEffectiveDateNotImputedToIndividualProvision": true,
  "federalDerivedStateCode": true,
  "sourceCollection": "ar-car-23-part-500",
  "region": "AR"
}
```