# Columbia Gas System Service Corp — Pipeline Safety Interpretation

**Citation:** PI-70-0109  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1970-11-03

PI-70-0109 response to Columbia Gas System Service Corp concerning 192.3.

## Document text

<<<PAGE 1>>>

PI-70-0109
November 3, 1970
Mr. Richard A. Rosan
Senior Vice President
Columbia Gas System Service Corp
20 Montchanin Road
Wilmington, Delaware 19807
Dear Mr. Rosan:
Thank you for your letter of October 23, 1971, concerning application of Section 192.723 to leak surveys on
customer service lines between the curb box and the customer meter.
Section 192.3, 49 CFR, of the new minimum Federal safety standards defines a service line as a distribution
line that transports gas to a customer meter set assembly from a common source of supply. It is our
contention that under this regulation the burden is on the operator to ascertain the safe condition of the
customer service lines to which gas is delivered.
If we can be of any further assistance, do not hesitate to ask.
Sincerely,
Joseph C. Caldwell
Acting Director
Office of Pipeline Safety

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1970/g70-11-03_Rosan_192.3_Service_Line-nlmx.pdf>
- Source ID: `phmsa`
- SHA-256: `663ddb22414ea9b85175455f4bcab362d7ccab1a26e37175ed19932dd9835870`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T22:02:27.765Z
- Document slug: `phmsa-interpretation-pi-70-0109`

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