Wednesday, July 30, 2014
YOLO COUNTY NEWS
99 CENTS

Six more gas leaks found in Stonegate

By
From page A1 | January 19, 2012 |

PG&E has discovered 12 new gas leaks in Stonegate over the past month and a half, including six Grade 1 leaks along Lake Terrace Circle.

The utility company’s policy requires all Grade 1 leaks to be immediately repaired.

“Due to proximity of the leak or the severity, (Grade 1 leaks are) at a level that we deem to be repaired right away,” PG&E spokeswoman Brittany McKannay said Wednesday.

The newly discovered leaks — caused by failures in the plastic caps on the service tee lines where natural gas is piped to customers’ homes — pushes the total over the past five years in the West Davis neighborhood to 57.

In December, PG&E announced its plan to replace more than 2,000 feet of natural gas distribution line pipe in Stonegate, as well as 28 service lines that run to residents’ homes, in response to the deteriorating pipe and service tee caps that have been responsible for the majority of the leaks.

The pipe to be replaced runs along Marina Circle between Biscayne Bay Place and Secret Bay Place. PG&E also will switch out segments of main line pipe along Magellan Street, Secret Bay Place and Chesapeake Bay Avenue.

PG&E is targeting that part of the neighborhood because it has experienced the highest concentration of leaks.

The utility has declined to provide information about distribution lines under other Davis neighborhoods.

The new leaks have not prompted PG&E to alter its plan to replace only the 2,000 feet originally announced, McKannay said.

“At this point our replacement project remains the same,” she said. “These leaks were on the service tee caps. The replacement project that we’re doing is on the gas service main. After looking at the leak survey history, we felt it was important to replace the main line there.”

The chain of events began in November, when PG&E discovered six separate leaks in about a one-block radius on Marina Circle, after residents reported smelling gas.

PG&E crews then began performing biweekly gas leak surveys in selected areas throughout Stonegate and subsequently found a spate of new leaks, prompting the replacement plan.

However, last month, after residents in Stonegate again complained of smelling gas, the utility discovered six more leaks on Lake Terrace Circle and subsequently repaired them.

Lake Terrace Circle had not been part of the biweekly gas leak surveys PG&E had been performing over the past months.

The failure of the pipes once again call into question the reliability of Aldyl “A” pipe, which PG&E has confirmed makes up the majority of the distribution lines underneath Stonegate.

But Gene Palermo, a plastic pipe consultant who worked for Dupont in the Aldyl “A” polyethylene pipe business for natural gas distribution for about 30 years, said plastic pipe is the best material for the job.

He said any impinging rock or bending in the pipe does reduce the service life, however, his research shows the failure rate is low.

“The rate is about four leaks per 100 miles of pipe per year,” Palermo explained. “If you look at the other pipe material that’s used, such as metal, the rate is about 43 leaks per 100 miles, or 10 times more, because of corrosion.”

According to PG&E, about 4.7 miles of distribution line pipe runs underneath Stonegate. Using Palermo’s numbers, that should yield only one leak over the past five years.

“Those are statistics that the gas company should be considering replacing the pipe,” Palermo said. “That’s definitely a failure rate that’s higher than what I’ve seen.”

Beyond the 2,000-foot replacement project, PG&E also is working to develop a GIS program to provide more detail about Davis’ natural gas distribution system.

Meanwhile, the Davis Fire Department continues to work with the utility to monitor the process and the plan.

Fire Chief Bill Weisgerber reminds residents to call the Fire Department if they smell natural gas.

“PG&E is keeping us informed with their progress,” Weisgerber said. “It’s a rather involved undertaking and it’s going to take some time to execute this replacement project.

“By the same token, the Davis Fire Department is at the ready to respond. If people do think they smell gas, call us.”

— Reach Tom Sakash at tsakash@davisenterprise.net or (530) 747-8057. Follow him on Twitter @TomSakash

Comments

comments

Tom Sakash

Tom Sakash covers the city beat for The Davis Enterprise. Reach him at tsakash@davisenterprise.net, (530) 747-8057 or @TomSakash.
  • Recent Posts

  • Enter your email address to subscribe to this newspaper and receive notifications of new articles by email.

  • .

    News

     
    Family enterprise builds a home for music

    By Elizabeth Case | From Page: A1 | Gallery

     
    Mosquito districts sprays tonight

    By Enterprise staff | From Page: A2

     
    Bob Dunning: Poll dancing, direct from Las Vegas

    By Bob Dunning | From Page: A2

    Health premiums rose significantly in 2014

    By The Associated Press | From Page: A2

     
    Biggest book sale to date opens Friday at Davis library

    By Enterprise staff | From Page: A4

    Share your love of nature with young wetlands visitors

    By Special to The Enterprise | From Page: A4 | Gallery

     
    Tasting event benefits Yolo Land Trust

    By Lily Holmes | From Page: A4

    Movies in the Park return this fall

    By Enterprise staff | From Page: A4

     
    Tee off for Davis’ continued prosperity

    By Lily Holmes | From Page: A4

    Center for Families hosts Summer Carnival

    By Enterprise staff | From Page: A4

     
    Vintage car show planned this fall

    By Enterprise staff | From Page: A4

    Davis native named a Schweitzer Fellow

    By Special to The Enterprise | From Page: A4

     
    DHS Class of ’94 set 20th reunion

    By Enterprise staff | From Page: A5

    Tips, techniques will give you a green thumb

    By Enterprise staff | From Page: A5

     
    Grief support focuses on journaling

    By Special to The Enterprise | From Page: A5

    How the Bockler wasp got its name

    By Kathy Keatley Garvey | From Page: A5 | Gallery

     
    Kiwanis golf tournament supports local agencies

    By Enterprise staff | From Page: A5

    Drop off school supplies at Edward Jones offices

    By Enterprise staff | From Page: A5

     
    Wine-tastings will benefit YCCC

    By Enterprise staff | From Page: A5

    UC Davis alumnus hopes to bring amateur radio to Nepal

    By Rachel Uda | From Page: A7 | Gallery

     
    Yolo County CASA seeks volunteer child advocates

    By Enterprise staff | From Page: A7

    Recycle old paint cans for free

    By Enterprise staff | From Page: A8

     
    .

    Forum

    Not sure which direction to go

    By Creators Syndicate | From Page: B5

     
    Violence as entertainment

    By Letters to the Editor | From Page: A6

    Shocked at vampires story

    By Letters to the Editor | From Page: A6

     
    Paul Krugman: Corporate artful dodgers

    By Paul Krugman | From Page: A6

    Nicholas Kristof: The world’s coolest places

    By Nicholas Kristof | From Page: A6

     
    Tom Meyer cartoon

    By Debbie Davis | From Page: A6

    Gravel mining affects us all

    By Letters to the Editor | From Page: A6

     
    .

    Sports

    Fiona Buck pushes the limits in para-athletics

    By Felicia Alvarez | From Page: B1 | Gallery

     
    A’s rally to win

    By The Associated Press | From Page: B1

    Morse homers but Giants lose 6th straight

    By The Associated Press | From Page: B1

     
    Nightmare on Ballpark Drive for River Cats

    By Will Bellamy | From Page: B1 | Gallery

    Schaub settles in as Raiders starting QB

    By The Associated Press | From Page: B2

     
    .

    Features

    .

    Arts

    Brady earns top honors at State Fair

    By Enterprise staff | From Page: A9

     
    Smither releases new CD Saturday at The Palms

    By Kate Laddish | From Page: A9 | Gallery

    RootStock kicks off ‘Día de Albariño’

    By Enterprise staff | From Page: A9

     
    Folk musicians will jam in the Arboretum

    By Enterprise staff | From Page: A9

    YoloArts to host a state of change exhibit

    By Enterprise staff | From Page: A9

     
    UCD professor Andy Jones named Davis’ new poet laureate

    By Rachel Uda | From Page: A9 | Gallery

     
    Molten art on display at Davis Arts Center

    By Enterprise staff | From Page: A9

    .

    Business

    .

    Obituaries

    Calvin D. Rourke

    By Special to The Enterprise | From Page: A4

     
    .

    Comics

    Comics: Wednesday, July 30, 2014

    By Creator | From Page: B6