# San Diego Gas and Electric — Pipeline Safety Interpretation

**Citation:** PI-85-0100  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1985-01-17

PI-85-0100 response to San Diego Gas and Electric concerning 193.2005.

## Document text

<<<PAGE 1>>>

PI-85-0100
U.S. Department of Transportation
Research and Special Programs Administration
Materials Transportation Bureau
555 Zang Street
Lakewood, Colorado 80228
January 17, 1985
Mr. Mike Olson
San Diego Gas and Electric
101 Ash
San Diego, CA 92112
Dear Mr. Olson:
This responds to your inquiry to Mr. Cesar De Leon of our office regarding your request concerning the possible
deactivation of the SDG&E LNG plant. You inquired how you could deactivate the plant, and still retain the grandfather
clause for the plant so that it can be brought back into operation without having to meet the current LNG design and
construction requirements.
From a review of Section 193.2005(b), a facility constructed in the 1960's, would not have to comply with the applicable
requirements of Part 193 governing siting, design, installation and construction unless the facility is replaced, relocated,
or significantly altered. Other sections of Part 193 which are pertinent are:
1. Section 193.2603(b) states that an operator may not return to service any component which is not maintained in
accordance with Subpart G.
2. Section 193.2619(b) states that a control system which out of service for 30 days or more must be inspected and
tested for operational capacity before returning it to service.
I trust that this clarifies this matter.
Sincerely,
Jack C. Overly
Chief
Western Region Pipeline Safety
Office of Operations and Enforcement

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1985/g85-01-17_Oslon_193.2005-olox.pdf>
- Source ID: `phmsa`
- SHA-256: `ddf172c13a046753e57bf56d724e237cfa00c2c2968366e3276e02397adf998a`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T11:48:28.578Z
- Document slug: `phmsa-interpretation-pi-85-0100`

### Source metadata

```json
{
  "materialSubtype": "interpretation",
  "interpretationArea": "pipeline_safety",
  "representation": "full_text_from_official_pdf",
  "companies": [
    "San Diego Gas and Electric"
  ],
  "individuals": [
    "Mr. Mike Olson"
  ],
  "refIds": [
    "PI-85-0100"
  ],
  "catalogDates": [
    "1985-01-17"
  ],
  "catalogParts": [
    193
  ],
  "catalogRowCount": 1,
  "sourceRecordUrls": [
    "https://www.phmsa.dot.gov/node/67401"
  ],
  "linkedAttachmentUrls": [],
  "unavailableResponseUrls": [],
  "duplicateRepresentationUrls": [],
  "citedSections": [
    "193.2005",
    "193.2005(b)",
    "193.2603(b)",
    "193.2619(b)"
  ],
  "catalogPageUrls": [
    "https://www.phmsa.dot.gov/regulations/title49/section/1932005"
  ],
  "pdfUrls": [
    "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1985/g85-01-17_Oslon_193.2005-olox.pdf"
  ],
  "representations": [
    {
      "viewUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1985/g85-01-17_Oslon_193.2005-olox.pdf",
      "detailUrl": null,
      "detailHtmlPath": null,
      "pdfUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1985/g85-01-17_Oslon_193.2005-olox.pdf",
      "pdfArtifactPath": "data/sources/phmsa-interpretations/pi-85-0100.pdf",
      "pdfArtifactSha256": "d0ad17686dbf61af31923ccb5b6d96f5e936d425d360ec0fa57aef1a51831cd1",
      "extractedTextPath": "data/sources/phmsa-interpretations/pi-85-0100.v2.txt",
      "extractedTextSha256": "a53564ada281dc11b9faa15a40def501c976e4e105f6cd35cf8860cc66ec4cfe",
      "pageCount": 1,
      "extractionVersion": 2
    }
  ],
  "caveat": "Interpretations apply regulations to the facts presented and do not create independently enforceable requirements.",
  "jurisdiction": "US"
}
```