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Interpretation Response #PI-73-019 ([New Hampshire Public Utilities Commission] [Bruce B. Ellsworth])

Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date:

Company Name: New Hampshire Public Utilities Commission

Individual Name: Bruce B. Ellsworth

Location State: NH Country: US

View the Interpretation Document

Response text:

Jul 11 1973

Mr. Bruce B. Ellsworth

Gas Safety Engineer

New Hampshire Public Utilities Commission

26 Pleasant Street

Concord, New Hampshire 03301

Dear Mr. Ellsworth:

In your letter of June 25, 1973, you asked about "...§192.187, Vaults: sealing, venting, and
ventilation. (a) When the internal volume exceeds 200 cubic feet - (1) The vault or pit must be
ventilated with two ducts, each having at least the ventilating diameter of a pipe 4" in diameter;..."

The intent of this regulation is to assure that there is adequate ventilation so that a hazardous
condition will be avoided. Therefore, if the 8-inch vent with a 4-inch vent inside will provide
adequate ventilation to avoid this hazardous condition, the requirements of this regulation will be
satisfied. If you have any further questions relative to this requirements, please contact me.


Joseph C. Caldwell


Office of Pipeline Safety

Regulation Sections

Section Subject
192.187 Vaults: Sealing, venting, and ventilation