LAST REVIEW DATE: REVIEW CYCLE:

2/16/10 5 Years 

SPECIFICATION: 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 section numbering. Added 4.2. 

) ection 5.1 eleted CIPS and FIU, and “equally sensitive combustible 

 

) ection 6.0 eleted CIPS and FIU. 

) ection 7.1 B) eleted the CIPS and FIU gas measurement instruments 

 

) ection 7.2 A) eleted CIPS 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. Fiore 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 

PROGRAM
NUMBER: DATE: VOLUME: 1 and 10 PAGE 2

G-11806-16 2/16/10 

ection

Maintenance, O&M Manual 

F 6 

PAGES 

Insp and O

TITLE: GAS LEAK DETECTION SURVEY 

PROGRAM

1.0 SCOPE

This procedure describes the requirements 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 provide 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 and operator qualified personnel, using a g -

Infrared (DP-IR). 

 – An area that is predominantly commercial, including the 

 Shopping Malls/Centers 

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

tore , uildings 

following: 



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

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Maintenance, O&M Manual 

OF 6 

PAGES 

TITLE: GAS LEAK DETECTION SURVEY 

PROGRAM

5.0 DEFINITIONS (Continued) 

5.3 Annually – 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 customers

6

CONDUCTING SURVEYS

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

specification G-11861. 

7.0 PROCEDURE FOR 

7.1 Mobile Survey

 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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Inspection and 

Maintenance, O&M Manual 

OF 6 

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

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

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. 

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

annually. 

 8.3 A leak survey of the distribution services located in business districts shall 

be conducted annually. 

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

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 LEAKS
NUMBER: DATE: VOLUME: 1 and 10 PAGE 5

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Maintenance, O&M Manual 

OF 6 

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 

CON ITIONS D (Continued)

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

following criteria are met. 

 A) Significant variations in temperature oscillating above and below 32 

degrees Fahrenheit. Example: Temperatures below 32 degrees 

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

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Maintenance, O&M Manual 

OF 6 

PAGES 

TITLE: GAS LEAK DETECTION SURVEY 

PROGRAM

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

CONDITIONS (Continued)

 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 School Westchester / Mt. Pleasant 

Westchester Comm ty College uni Westchester / Greenburgh 

Yonkers Sewer Tre ent Plant atm 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 

Manhattanville College / Jap H.S. Westchester / Harrison 

Burke t Founda i n o Westchester / White Plains 

Masters School Westchester / Dobbs Ferry 

Cornell Med. Center Westchester / White Plains 

Pace University Westchester / 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 / New 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 

Graham 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. Botanical Gardens Bronx 

Calvary Hospital Bronx 

 G-11806 

Page 1 of 3 
 Attachment 1 – Leak Survey Annual Specials (Continued)

Jacobi Hospital Bronx 

Manhattan College Bronx 

Fordham University Bronx 

Bronx State Hospital 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 Depot 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 

Queens General Hospital Queens 

Long Island Jewish Hospital Queens 

Hillside Hospital Queens 

St. Johns University Queens 

Queensborough Community Col. Queens 

Queens College Queens 

Newtown Creek Station Queens 

Ravenswood Plant Queens 

U.S. Armory Queens 

Astoria Plant Queens 

Riker’s Island Correction 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 3 
G-11806 

 Attachment 1 – Leak Survey Annual Specials

Rockefeller Center Tree Lighting Manhattan 

Pulaski Day Parade Manhattan 

Columbus Day Parade Manhattan 

Veterans Day Parade Manhattan 

Macy's Thanksgiving Day Parade Manhattan 

Governors Island Manhattan 

16th Street Yard CNG Station Manhattan 

28th Street Yard CNG Station Manhattan 

 

 

Visy Paper Company Staten Island 

 

Parades in Manhattan indicating 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