OMB Control No. 2060 0722
Approval expires 08/31/2021
Vermont Gas Systems, Inc.
BMP Distribution Partner Since 2016

Background
Vermont Gas Systems provides an important energy service to more than 53,000 customers in
northwestern Vermont. VGS has maintained a tight transmission and distribution system through
frequent surveys, new technologies, pipe replacements and aggressive leak repair programs. To
date, Vermont Gas has replaced all cast iron and bare steel with either polyethylene or coated steel
and continues to follow a steel replacement program, retiring and replacing coated steel services
and mains annually. Vermont Gas has also completed several major gate station replacements.
Historical Highlights
Cast Iron and Bare Steel
Replacement
Vermont Gas has previously replaced all cast iron and
bare steel mains and services. The replacement
program officially began in 1984, with 41 miles of main
and 4,230 services that were either cast iron or bare
steel. An average of 2 miles of main and 200 services
were replaced annually. The program was completed
when the system no longer contained cast iron or bare
steel mains and services in 2004.
Cast Iron & Bare Steel Services
4500
4000
25CO
2000
1500
1000
500
0
1984198519861987198819891990199119921993199419951996199719981999 20002001200220032004
Station Replacements
In 1995, Vermont Gas began rebuilding or replacing
older gate stations. Seven stations have been rebuilt
to date. Two redundant stations were also retired
completely with the rebuild of one larger, new station.
EPA Form No. 5900 413

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Vermont Gas Systems, Inc. Historical Fact Sheet
Steel Replacement Program
Upon the 2004 completion of cast iron and bare steel
replacement, Vermont Gas continued with a steel
replacement program. Areas are evaluated on an
annual basis to determine if upgrading is
appropriate. Factors considered in the evaluation
include areas of isolated coated steel, low cathodic
protection readings and review of steel fittings for
any history of issues both within Vermont Gas and
industrywide. To date, VGS has replaced
approximately 9% of its entire steel system since
2005, with more replacement scheduled for 2019
and beyond.
Cumulative Percentage of
2005 Steel System Replaced
c?5 c?* cP ^ ^ \V hfb ^ tfp & A
Excess Flow Valves	Percentage of Services with
Excess Flow Valves
To mitigate the gas release from any third-party
damage of a service line, VGS began installing
excess flow valves (EFV) in the mid-1980s. VGS
continues to install EFVs where possible on all new
and replacement services.
To date, VGS has installed over 29,000 EFVs,
equating to approximately 72% of the total
distribution system.
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