LAST REVIEW DATE: REVIEW CYCLE:

2/16/10 5 Years



### S PECIFICATION: 

### G-11806-16

TLE: GAS LEAK DETECTION SURVEY

OLUME: and



##  EGISTRATION NO: GLS0505 & GLS0506

RGET TRAINING Leak Survey

EVISIONS: 

##  )

1) Cover Page - Revised Registration Numbers.

) able of dded Attachment 1, ”Leak Survey Annual Specials.”

) ection 4.0 dded secti on numbering. Added 4.2.

) ection 5.1 eleted CIPS and FI U, and “equally sensitive combustible

) ection 6.0 eleted CIPS and FIU.

) ection 7.1 B) eleted the CI PS and FIU gas measurement instruments

) ection 7.2 A) eleted CI PS and FIU. Reworded the section.

) ection 7.2 B) hanged “inspected” to “surveyed.”

) ection 8.0 eleted previous 8.3 regarding leak survey of distribution

0) ection 11.0 eformatted section numbering.

ttachment 1 dded. 

### PROGRAM TI

V 

## 1 10

R

GROUP: TA

R (See

2 T

Contents - A

3 S

- A

4 S

- D

gas detecting unit.”

5 S

- D

6 S

- D

and “other solid state leak detection instruments.”

7 S

- D

8 S

- C

9 S

- D

mains in areas other than new business. Renumbered

subsequent sections.

1 S

- R

A

- A

### G-11806-16 

# Gas Operations Standards

EFFECTIVE DATE : March 18, 2010

TABLE OF CONTENTS

SECTION TITLE PAGE

1.0 SCOPE 2

2.0 LEGAL REQUIREMENTS 2

3.0 ORGANIZATIONS APPLICABLE 2

4.0 RESPONSIBILITY 2

5.0 DEFINITIONS 2

6.0 LEAK SURVEY INSTRUMENT SENSITIVITY 3

7.0 PROCEDURE FOR CONDUCTING SURVEYS 3

8.0 PERIODIC LEAK SURVEY REQUIREMENTS 4

9.0 SURVEYS BY CUSTOMERS 4

10.0 REPORTING LEAKS 5

11.0 HIGH-SPEED CAST IRON SURVEY

CRITERIA – EXTREME WEATHER

CONDITIONS 5

12.0 RECORDS 6

13.0 REFERENCES 6

ENVIRONMENTAL REVIEW BY: A. Fior e SAFETY REVIEW BY: J. Fiorini

PREPARED BY: APPROVED BY: DATE: VOLUME: 1 and 10 PAGE 1

OF

A. Boyd and

S. Bongiorno Liliana Gonzalez

General Manager,

Technical Operations 2/16/10 Inspection and

Maintenance,

O&M Manual 6

PAGES 

##  ATTACHMENT 1 LEAK SURVEY ANNUAL SPECIALS 

### TITLE: GAS LEAK DETECTION SURVEY

PROGRAMDATE: GE 2 NUMBER: VOLUME: 1 and 10 PA

G-11806-16 2/16/10 ection

Maintenance, O&M Manual F 6

PAGES Insp a nd O 

### TITLE: GAS LEAK DETECTION SURVEY

PROGRAM

1.0 SCOPE

This procedure describes the requirement s for leak detection surveys of the gas

transmission and distribution systems, including service lines to building walls

and unde

2.0 LEGAL REQUIREMENTS rground piping beyond the c stomer’s meters. u

dure co p

2. Federal: DOT 192.706 and 192.723.

2. State: 16N C ), and 261.17.

3.0 O NIZATION A This proce m lies with requirements of:

1

2 Y RR 255.706, 723( a) and (b

RGA S PPLICABLE

Leak urvey.



##  4.0 R NSIBILITY S

ESPO

4. The Leak S r erati n

Department is responsible for performing mobile and walking surveys of

gas mains and gas services. They shall report all leaks found to the Gas

Emergency Response Center.



##  4.2 Each Gas Operating Area shall pr ovide frost line data to Leak Survey.

5.0 DEFINITIONS 1 u vey Section of Gas Engineering’s Technical Op o s



##  5.1 Leak survey - A survey to detect gas leaks from gas pipelines, performed

y trained as detector,

Detecto Pak-

5.2 Business district b an d operator qualified per sonnel, using a g

- Infrared (DP-IR).

– An area that is predominantly commercial, including the

Shopping Malls/Centers

 Streets where the majority (great er than 50%) of the buildings are

tore , uildings following:



s s shops, factories, plants and/or office bNUMBER: DATE: VOLUME: 1 and 10 PAGE 3

G-11806-16 2/16/10 Inspection and

Maintenance, O&M Manual OF 6

PAGES 

### TITLE: GAS LEAK DETECTION SURVEY

PROGRAM

5.0 DEFI NITIO NS (Continued)

5.3 An nually – An interval not exceeding 15 months but at least once each

calendar year.

5.4 Transmission system - Gas pipelines operated at pressures over

125 psig.

5.5 Distribution system

- including services up to building walls and all known underground gas Gas pipelines other than the transmission system

meters, but excluding customers

piping in industrial complexes.



##  .0 LEAK SURVEY INSTRUMENT SENSITIVITY piping beyond the outlet of the custom ers

6

CONDUCTING SURVEYS Maintenance and testing of the DP-IR will be performed in accordance with gas

specification G-11861.

7.0 PROCEDURE FOR

y 7.1 Mobile Surve

A) Prior to conducting mobile surveys, personnel will obtain the most

ose as possible) at a speed of 8 -10 mph.

Gas mains located behind the curb or edge of the road, or on

ile Leak surveys will be conducted with the DP-IR alarm level set

between 3 and 5 PPM, use 3 for remote areas and 5 for heavy traffic

ehicle

" from the street on level ground. The

or ice) could interfere with the sampling system of the vehicle.

Leak surveys will not normally be conducted during inclement

weather, however during decla

su

7.0 PROCEDURE FOR CONDUCTING SURVEYS up to date maps (i.e. general mains maps; M&S Plates)

indicating the location of the facilities to be surveyed. Mobile

surveys are conducted by driving a vehicle equipped with a DPIR

over the gas main (or as cl

sidewalks must be surveyed by walking (See Section 7.2).



##  B) Mob

areas. No scale adjustment is required.

C) Under normal conditions, the sample cones or funnels on the v

should be approximately 2

sample cones may be shortened when winter ground cover (snow,

slush

D)

red system emergencies special

rveys can be being conducted upon request.

(Continued)NUMBER: DATE: VOLUME: 1 and 10 PAGE 4

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PAGES 

### TITLE: GAS LEAK DETECTION SURVEY

PROGRAM

7.2 Walking Surveys of Services

ing the walking surveys Leak Survey Technicians will

e

chnicians will walk the path of the service from the curb (or

t

s with



##   A) Prior to perform

obtain the most up to date maps (i.e. M&S plates) indicating servic

locations. Using the maps and other visible references (i.e. curb

valves), te

edge of the road) to the building with the DP-IR alarm level se

nd 5 PPM, use 3 for remote areas and 5 for area between 3 a

heavy traffic. No scale adjustment is required.

B) If a service is in an area which can be surveyed by driving a vehicle

over it, it will be surveyed by a mobile survey instead of a walking

survey (See Section 7.1).



##  8.0 PERIODIC LEAK SURVEY REQUIREMENTS

8.1 A leak survey of the transmission system shall be conducted three times

per calendar year.

in business districts shall be conducted 8.2 A leak survey of distribution mains

annually

.

8.3 A leak survey of the distribution se rvices located in business districts sha ll

be conducted annually

.

8 A leak survey of distribution servic es in areas other than business distric .4 ts

shall be done on a three-year cycle.

9 .0 SURVEYS BY CUSTOMERS

A no resi ential customer may accept responsibility for a required leak survey;

on Edison must maintain appropriate records and verify that the leak

completed. n- d

however, C

survey was

10.0 REPORTING LEAKSNUMBER: DATE: VOLUME: 1 and 10 PAGE 5

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PAGES 

### TITLE: GAS LEAK DETECTION SURVEY

PROGRAM

as le ks d ance with G-11809. Source codes to be used by the Leak Survey Section are as

follows:

12 - Business area service survey

service survey

56 - Reconstruction areas, special surveys etc.

spitals

61 - Special surveys - colleges and universities

s leak surveillances - (New leaks use code 63)

High-speed cast iron main patrols (broken main survey)



##  11.0 G a etected during surveys shall be classified and reported in accord

33 - Non-business area

41 - Low pressure mains survey

47 - New York Facility mains survey

48 - Pre-paving survey

51 - Medium and high pressure mains survey

55 - Cast iron encroachment related survey

57 - Pre-paving surveys

61 - Special surveys - ho

61 - Special survey - marathon routes

61 - Special surveys - parade routes

61 - Type 3 ga

61 - Other special surveys not listed anywhere else

65 -

HIGH-SPEED CAST IRON SURVEY CRITERIA – EXTREME WEATHER

C ON ITIONS D (Continued)

A High-Speed Cast Iron Survey may b 11.1 e deployed when any one of the

following criteria are met.

ons in temperature oscillating above and below 32 A) Significant variati

degrees Fahrenheit. Example: Te mperatures below 32 degrees

rising to 40 degrees or more, then dropping below 32 degreesNUMBER: DATE: VOLUME: 1 and 10 PAGE 6

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PAGES 

### TITLE: GAS LEAK DETECTION SURVEY

PROGRAM



##  11.0 HIGH-SPEED CAST IRON SURVEY CRITERIA – EXTREME WEATHER

CONDITIONS (Continu ed)

B) When the ambient temperature is forecasted to remain at 32

r more consecutive days and

more per day over 2

ches or greater exist.

)

) followed by a rise in temperature to 40 degrees or more and falling

below 32 degrees or

degrees Fahrenheit or lower for 7 o

the system experiences three breaks or

successive days or

C) When the temperature falls below 20 degrees Fahrenheit and field

verified frost depth conditions of 24 in

11.2 When deployed, the High Speed Cast Iron survey will concentrate on:

A 4”, 6”, and 8” cast iron mains and

B Areas with historical cast iron breaks

12.0 RECORDS

1 R s of transmission system leak su 2.1 ecord rveys shall be retained for as long

2.2 all be retained for six years,

cludi f piping by non-residential

2.3 as le 11834.

ENCES as the segment of main involved remains in service.

1 Records of distribution system leak surveys sh

in ng verification of completed surveys o

customers (see Section 9.0).

1 G ak records shall be prepared in accordance with G -

13.0 REFER

air, and Repair Follow-Up

M G-11809 - Procedure for Outside Gas Leak Reporting, Classification,

Surveillance, Rep

G-11834 – Procedure for Recording and Monitoring an Outside Gas Leak and

Repair History

G-11861 – Procedure for the Inspection, Maintenance and Operation of Gas

easurement Instruments

##  Attachment 1 – Leak Survey Annual Specials (Continued)

NAME OF SPECIAL BOROUGH / COUNTY / MUNICIPALITY

All F ility Mains ac All Boroughs

N.Y.C. Marathon Route Manhattan-Bronx-Queens

Margret Chapman Sch ool Westchester / Mt. Pleasant

Westch uni ester Comm ty College Westchester / Greenburgh

Yonke atm rs Sewer Tre ent Plant Westchester / Yonkers

Hawthorne County Day School Westchester / Hawthorne

S.U.N.Y. Campus Westchester / Harrison

Westchester Medial Center Westchester / Mt. Pleasant

Pleasa ville C e S nt ottag chool Westchester / Pleasantville

F.D.R. eterans Hospit V al Westchester / Cortlandt

Manha ttanville College / Jap H.S. Westchester / Harrison

Burke t Founda i n o Westchester / White Plains

Masters Schoo l W estchester / Dobbs Ferry

Cornell Med. Center Westchester / White Plains

Pace Universit y Westch ester / Mt. Pleasant

Hackley School Westchester / Tarrytown

Church of Devine and Passion / Pace

Law Westchester / White Plains

R rd CNG Station

ye Ya Westchester / Rye

Iona College Westchester / Ne w Rochelle

O e Mem rial Home

zborn o Westchester / Rye

Eastview Yard CNG Station Westchester / Eastview

Leake & Watts Home & School Westchester / Yonkers

Wartburg Home Westchester / Mt. Vernon

G raham o Scho l Westchester / Hastings

Julia Dykman Foundation Westchester / Hastings

Veterans Hospital Bronx

S ephs Institute

t. Jos Bronx

M c School

sgr. S anlon High Bronx

Mt. Saint Vincent College Bronx

Bronx Zoo Bronx

N .Y. Bo tanical Gardens Bronx

Calvar y Hospital Bronx

G-11806

Page 1 of 3

##  Attachment 1 – Leak Survey Annual Specials (Continued)

al Jacobi Hospit Bronx

Manhattan College Bronx

F ordham University Bronx

Br onx State Hosp ital Bronx

Lehman College Bronx

Mt. Saint Michael School Bronx

Horace Mann School Bronx

Montefiore Hospital Bronx

St. Barnabas Hospital Bronx

Albert Einstein Hospital Bronx

Bronx Community College Bronx

NYC Transit Bus D epot Bronx

Villa Maria Academy Bronx

Riverdale Country Day School Bronx

Van Nest Yard CNG Station Bronx

City Island Bronx

Hunts Point Station Bronx

Hellgate (NYPA) Bronx

United Cerebral Palsy Institute Queens

Creedmore Hospital Queens

Quee ns General Hospital Queens

Long Island Jewish Hos pital Queens

Hillside Hospi tal Queens

St. Johns University Queens

Queensborough Community Col. Queens

Queens College Queens

Newtown Creek S tation Queens

Ravenswood Pla nt Queens

U.S. Armory Queens

As toria Plant Queens

Riker’s Island Corre ction Facility Queens

L.N.G. Plant Queens

Astoria Yard CNG Station Queens

College Point CNG Station Queens

Times Square Manhattan

G-11806

Page 2 of 3G-11806 

##  Attachment 1 – Leak Survey Annual Specials

ree Lighting Rockefeller Center T Manhattan

Pulaski Day Parade Manhattan

Columbus Day Parade Manhattan

Veterans Day Par ade Manhattan

Macy's Thanksgiving Day Parade Manhattan

Governors Island Manhattan

16th Street Yard CNG Station Manhattan

28th Street Yard CNG S tation Manhattan

Visy Paper Company Staten Island

Parades in Manhattan ind icating res nsible group and due d po ate.

ade 17-Mar Manhattan GDS

rade 20-Mar Manhattan GDS

erto Rican Day Parade 7-Jun Manhattan GDS

1-Sep Manhattan DS

5-Oct Manhattan DS

13-Oct Leak y

11-Nov Leak y

ing Day Parade 27-Nov Leak y

31-Dec Leak y

G-11806

Page 3 of 3 St. Patrick’s Day Par

Salute to Israel Pa

Pu

Labor Day Parade G

Pulaski Day Parade G

Columbus Day Parade Surve

Veterans Day Parade Surve

Macy’s Thanksgiv Surve

Times Square Surve