DG 99-021 Northern Utilities, Inc. Petition For Approval of Tariff Changes Order NISI Approving Tariff Clarification of Interruptible Transportation and Sales Services and also Compliance with the Gas Industry Standards Board O R D E R N O. 23,152 February 22, 1999 Northern Utilities, Inc. (Northern) filed a petition on February 8, 1999 to modify its existing tariff by clarifying the Interruptible Transportation (IT) and Interruptible Sales (IS) Service terms and conditions. Northern proposes to modify its IT and IS Services to require for all interruptible customers a mandatory thirty-day curtailment period during the winter season. Under Northern's proposal, customers would be notified five (5) business days prior to the commencement of the curtailment period. In addition, Northern will continue to curtail IT and IS Services on any other day outside of the 30-day curtailment period to the extent Northern determines that the interruption is necessary to allow Northern to optimize the use of the distribution system for service to firm transportation and sales customers. Interruptible Transportation and Interruptible Stand-By Gas Supply Services are currently subject to interruption and/or curtailment. Northern states that the requested changes clarify the availability of interruptible service as a service which is not available year round. The tariff changes also serve to further distinguish interruptible service from firm gas service. Northern also proposes to change the start of the gas day from 8:00 a.m. to 10:00 a.m. A gas day is a period of twenty-four (24) consecutive hours used by the delivering pipeline. The proposed change will bring Northern into compliance with the Gas Industry Standards Board gas day, which was implemented on June 1, 1997. We approve the requested changes to the IT and IS Services tariffs. The public interest is served by a clear delineation among services offered by Northern resulting from differences in the underlying costs of the services. Additionally, we approve the revision to the gas day. We recognize that Northern's tariffs should reflect industry standards where appropriate and it is also consistent with the 10:00 a.m. gas day already used by EnergyNorth Natural Gas, Inc. Based upon the foregoing, it is hereby ORDERED NISI, that Northern's proposed revisions to its tariffs for Interruptible Transportation and Interruptible Sales Services are APPROVED; and it is FURTHER ORDERED, that Northern shall cause a copy of this Order Nisi to be published once in a statewide newspaper of general circulation or of circulation in those portions of the state where operations are conducted, such publication to be no later than March 1, 1999 and to be documented by affidavit filed with this office on or before March 8, 1999; and it is FURTHER ORDERED, that Northern shall notify its existing and known prospective IT and IS Service customers of the proposed tariff changes by sending a copy of this Order Nisi by first class mail, such notification to be no later than March 1, 1999; and it is FURTHER ORDERED, that all persons interested in responding to this petition be notified that they may submit their comments or file a written request for a hearing on this matter before the Commission no later than March 15, 1999; and it is FURTHER ORDERED, that any party interested in responding to such comments or request for hearing shall do so no later than March 22, 1999; and it is FURTHER ORDERED, that this Order Nisi shall be effective March 24, 1999, unless the Commission provides otherwise in a supplemental order issued prior to the effective date; and it is FURTHER ORDERED, that Northern shall file a compliance tariff with the Commission on or before March 24, 1999, in accordance with N.H. Admin. Rules, Puc 1603.02(b). By order of the Public Utilities Commission of New Hampshire this twenty-second day of February, 1999. Douglas L. Patch Susan S. Geiger Nancy Brockway Chairman Commissioner Commissioner Attested by: Thomas B. Getz Executive Director and Secretary