NGPL discovered a leak Monday on its HI [High Island] Block 71Lateral offshore southeastern Texas. Three platforms (High IslandBlocks 71, 139 and 116) with scheduled nominations through thelateral were shut on Tuesday until further notice. Shippers will benotified via NGPL’s bulletin board when nominations may be resumed.

Tennessee confirmed that a leak on its 26-inch 507K-100 Lineoffshore southwestern Louisiana (see Daily GPI, June 20) had been repaired Mondayafternoon. Five producers were shut in for the six to nine hours ittook to complete repairs, a spokesman said.

NOVA changed its daily imbalance tolerance range Tuesday morning to+2%/-18 until further notice. The pipeline had announced last week itwould be lowering target linepack levels in equal increments each daythis week (see Daily GPI, June19). Westcoast in neighboring British Columbia also had problemswith excessive linepack, setting its tolerance range to 0/-20% fortoday’s gas day.

Northwest will be installing a cyclone separator July 6 on its30-inch mainline upstream of the Sumner (WA) Compressor Station.This work has been coordinated with an outage of Westcoast’s FortNelson Plant to help in minimizing impact. The Sumas/Sipi deliverypoint will have only 410,000 Dth/d available July 6 out of itsdesign capacity of 1,097,000 Dth/d. The mainline is expected to beback in service on July 7. Sumner will not be available that daydue to additional tie-ins associated with the installation project;however, capacity impact will lessen to 68,000 Dth/d. Based oncurrent nominations, no impact to shippers is anticipated at thatlevel.

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