OMB Control No. 2060 0722
Approval expires 08/31/2021
Pacific Gas and Electric
BMP Distribution and Transmission Partner Since 2016
Pacific Gas and
Electric Company
Pacific Gas and Electric Company (PG&E), a subsidiary of PG&E Corporation, is one of the largest combined natural
gas and electric utilities in the United States. Based in San Francisco, the company delivers some of the nation's
cleanest energy to nearly 16 million people in Northern and Central California. PG&E has made unprecedented changes
in recent years to improve our natural gas system and we are dedicated to continue working with stakeholders to
identify innovative and responsible solutions to reduce greenhouse gas emissions. PG&E was recognized by the White
House in its 2014 Climate Action Plan as one of the few gas utilities nationwide collaborating to address key technical
and regulatory factors affecting methane emission reduction opportunities. PG&E continues to advocate for initiatives
supporting climate goals, and believes the EPA's Natural Gas Star Methane Challenge will help us pursue these goals.
Historical Highlights
Increased Leak Detection-Picarro Surveyor
In 2012, PG&E was the first utility in the country to test
and deploy the vehicle-mounted Picarro Surveyor, a leak
detection system, which is 1,000 times more sensitive
than traditional leak detection equipment. In 2014, PG&E
established its Supercrew workstream to help work flow
more efficiently across teams focused on performing leak
survey and leak repair. This process allows PG&E to
detect more leaks, bundle repair activities, and fix leaks
faster and more efficiently than ever before. PG&E has
been able to survey more of its system, which has led to a
99 percent reduction of minor, non-hazardous leaks on its
system since 2010. Link
Cast Iron Pipeline Replacement
In 1985, PG&E established its pipe replacement program
to replace vintage gas distribution pipe. In 2014, PG&E
met our self-imposed year-end goal to replace all known
cast iron pipeline. Throughout this project, PG&E
employees replaced 847 miles of cast iron pipelineómore
than enough to stretch from San Francisco to Seattle.
PG&E has implemented one of the most comprehensive
gas pipeline modernization programs in the nation and
has been recognized for its efforts as it earned two
prestigious international safety-focused asset
management certifications for its gas operations. Link
Wind director
| Methane Pk
; Plume IJ	' ,	92	.
5 i	~ | Leak^Location |
Main Leaks per Mile by Year and Material
(Dig-ins, 3rd Party Damage Excluded)

jLli J
1 -1 -¶ -¶
2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015
EPA Form No. 5900 413

Pacific Gas and Electric Historical Fact Sheet
System Visibility
Since 2011, PG&E has automated 217 valves, and
approximately 522 miles of gas transmission pipeline
miles now have automated isolation capability. This
allows PG&E's transmission pipeline to be rapidly
isolated through remote control valve technology. Valves
can be opened or closed from PG&E's newly designed
Gas Control Center. The rapid isolation enhances
PG&E's and public officials' emergency response, while
reducing damage to property, the public, and methane
emissions to the environment. Link
Faster Response
PG&E is now responding to leaks faster than ever and
ranks amongst the top quartile nationally. In 2015, PG&E
began treating all gas odor calls as Immediate Response
and responding to all such calls in an average of 21
minutes. PG&E's two-phased approach included
increasing personnel to respond and treating all odor
calls as immediate response, and optimizing the
deployment of these crews.
This improved response metric continues to improve
public safety by responding to all gas odor calls as
quickly as possible. Link
Research arid Development Initiatives
PG&E continues to engage in research and technology
that better identifies and quantifies methane emissions
and sources. These advancements are improving the
way we prevent, find, measure, and fix sources of
methane emissions. Examples of this R&D include the
deployment of LiDAR laser technology to identify
methane emissions from aircraft, aerial deployment of
NASA JPL's adapted methane sensor on an unmanned
aircraft system, and most recently, installation of
stationary methane monitoring equipment that allows for
around-the-clock leak monitoring and aids in getting a
more accurate estimate of yearly methane emissions.
Transmission pressures and flows
Distribution pressures and flows
PG&E Average Response Time
21.3 19.9 20.3 20.5
2012 2013 2014 2015 2016
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