Utilities Manual

Question 1

Vapor Density

Answer 1

Relative weight of gas or vapor compared to air with a value of 1

Question 2

Considerations when Positioning for gas utility emergencies

Answer 2

Prior to, upwind of the hazard area

Should not position directly in front of or to the rear or beside the structure

Avoid parking over sewers, valve covers, manhole covers

Question 3

1st arriving units to gas leak (positioning)

Answer 3

When Possible 1st arriving units should position 100 ft or further from the incident

Question 4

Secondary responses to gas leak (positioning)

Answer 4

Upwind or prior to no closer than 300 ft

Remain in location until assigned otherwise

Question 5

Late arriving apparatus to gas leak

Answer 5

Driver should stage prior to dispatched address to avoid traveling through hazard zones

Question 6

Alarm Compliment for gas Leaks

Answer 6

2 Engines

1 truck

1 EMS unit

1 Chief

Question 7

Initial position of 1st due engine (gas leak)

Answer 7

Identify most appropriate hydrant not within 300ft of incident address

Position Engine at hydrant while maintaining the ability to forward lay

Question 8

Protecting utility company during outside natural gasleaks

Answer 8

Units position upwind with a 20lb dry chem and a charged hoseline

Question 9

Utility Color Codes

Answer 9

Red: Electric, Cable, Conduit, Lighting

Yellow: Gas, Oil, Steam, Petroleum

Orange: Comms, Alarm, Signal, Cable

Blue: Portable Water

Purple: Reclaimed Water

Green: Sewer and Drain lines

Pink: Survey Markings

White: Proposed Excavation