Delivering LNG to remote sites to service pipeline interrupts on a temporary basis.

Temporary LNG delivery systems meet the technical definition of an LNG facility. However 49 CFR § 193.2019 allows that the authority for temporary LNG systems are within the jurisdiction of NFPA 59A

Temporary LNG delivery systems are not complicated systems. The three primary components include delivery transport trailers with a capacity of approximately 10,000 gallons, a vaporizer to warm the liquid gas to a vapor state and an odorizer to stench the gas. Accessory items required are hoses, regulators and a connecting manifold.

Once the equipment has been assembled on site and gas is flowing there is a minimum amount of activity to maintain the system. Regulation and odorizers will be monitored and the system checked for leaks. The primary activity will be the change out of the transport trailers. This requires the closing of one valve and opening of a second valve on the manifold and disconnection of the hose from the depleted transport. The depleted transport is returned for re-fill and a full transport is backed in to replace it.

NFPA 59A 49 CFR Pipeline and Hazardous Materials Safety Administration § 193.2019 provides that NFPA 59A is the governing authority on mobile and temporary LNG facilities.

§ 193.2019 Mobile and temporary LNGfacilities.

(a) Mobile and temporary LNG facilitiesfor peak-shaving application, for

service maintenance during gas pipelinesystems repair/alteration, or for

other short term applications need notmeet the requirements of this part ifthe facilities are in compliance with

applicable sections of NFPA 59A (incorporatedby reference, see § 193.2013).

The following slides show equipment combinations on site delivering LNG for a pipeline interrupt for Williams Northwest Pipeline in Washington State and for back up supply at an Intel plant in Chandler, AZ.

The Williams job included LNG tankers, a hot water vaporizer and a compressor. This project included service at two separate locations. Rawhide operated with continuous 24 hour service for 3 days at the first site, relocated the equipment to the second site readied the equipment for service in one day and then operated successfully for an additional four days. Ten LNG transports were used to supply the project.

At Intel we used both an ambient air vaporizer and the hot water vaporizer. Rawhide operated as a sub-contractor to Hoffman construction for this project.