Gas business day
A gas business day is defined as a week day from Monday to Friday, which is not an official bank holiday in the state of Lower Saxony / Germany. December 24 and 31 are likewise not deemed to be gas business days. BEB´s normal working hours are within the times of 07:30 and 16:30 of a gas business day.

Gas day
The period between 06:00 (CET / CEST) on one (1) calendar day and 06:00 (CET /CEST) on the following calendar day. The date of any gas day shall be the date of its beginning as herein defined.

Gas trans­mission system
Pipeline system owned and/or operated by Gasunie Deutschland Transport Services GmbH including those parts of the pipeline system of joint venture companies (e.g. NETRA / / DEUDAN) where Gasunie Deutschland Transport Services GmbH has contrac­tually secured capacity and which exclu­sively trans­ports natural gas.

General Terms and Condi­tions or GT&Cs
This document including the attach­ments thereto and the operating manual storage and any amend­ments thereof that comprises the condi­tions under which BEB performs natural gas storage services and services related thereto.

Gross calorific value or GCV
The gross calorific value of a gas is in accor­dance with DIN 51857 given by the negative value of the reaction enthalpy which takes place during gas combustion under constant pressure p = 1013.25 hPa. A requi­rement for this is that the tempe­rature of the reaction products after combustion is the same as the tempe­rature of the components taking part in the reaction before combustion. The reference tempe­rature is inter­na­tio­nally fixed at 25oC.
The gross calorific value represents the heat released under the afore­men­tioned condi­tions during complete combustion of a dry gas in air in gaseous form, if the combustion products are only carbon dioxide CO2 (gas), water H2O (liquid), nitrogen N2 (gas) and sulphur dioxide SO2 (gas).
For the purpose of gas storage, measu­rement units relating to volume are used for the gross calorific value (in kWh/m³ or MJ/m³).

Handling period
Period of time needed for the imple­men­tation of contracted storage capacity and services related thereto as specified in Section 8, paragraph 5 of the GT&Cs.

Histo­rical GCV
Average daily values of gross calorific value of natural gas at a storage delivery point or a storage offtake point regis­tered by BEB for the preceding storage gas year.

Hourly capacity overrun
has the meaning ascribed to it in Section 11, paragraph 3 of the GT&Cs.

Identity of natural gas
There is a identity of natural gas if the injected and withdrawed natural gas quantities are identic. If the identity of natural gas is not maintained the natural gas quantities redeli­vered at the storage offtake point are not identical to those delivered at the storage delivery point. Instead, other quantities with equivalent energy content are made available.
Injection curve The injection curve represents the injection rate of a storage as a function of the degree of storage inventory. The greater the degree of storage inventory the greater the internal pressure against which the natural gas must be injected, so that from a specific point onwards the injection rate decreases.

Injection period
With regard to the pore storages Dötlingen and Uelsen the injection period starts after the spring shutdown phase and ends after the autumn shutdown phase for each storage. The injection period generally commences on 1 April and ends on 1 October of any one year.

Injection rate
Volume of the natural gas flow in m³(Vn)/h with which the natural gas is injected into the storage in accor­dance with the respective injection curve. Injection rate is stated in m³(Vn)/h unless otherwise speci­fi­cally noted.

Inter­rup­tible bundled services
Bundled services that are / may be contracted by storage customer on an inter­rup­tible basis in accor­dance with Section 4 of the GT&Cs. Utili­sation of inter­rup­tible bundled services may be inter­rupted by BEB in accor­dance with Attachment 8.

Inter­rup­tible unbundled services
Unbundled services that are / may be contracted by storage customer on an inter­rup­tible basis in accor­dance with Section 4 of the GT&Cs. Utili­sation of inter­rup­tible unbundled services may be inter­rupted by BEB in accor­dance with Attachment 8.