GAS TRANSMISSION TARIFFS YEAR st JANUARY st DECEMBER 2016

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1 GAS TRANSMISSION TARIFFS YEAR st JANUARY st DECEMBER 2016 Gas transmission tariffs have been calculated according to the provisions of the Delibera 514/2013/R/GAS published on 14 rd November 2013 by the Authority for Electricity Gas and Water. Gas transmission tariff for firm service on annual basis The gas transmission tariff T for firm service on annual basis is defined by the following formula: where: T = (Ke * CPe) + (Ku * CPu) + (Kr * CRr) + (V * CV); - Ke is the capacity booked by the user at entry point e of the national transmission network, expressed in Sm 3 /d; - CPe is the capacity charge for the national transmission service related to the capacity booked at entry point e of the national transmission network, expressed in Euro/y/ Sm 3 /d; - Ku is the capacity booked by the user at exit point u of the national transmission network, expressed in Sm 3 /d; - CPu is the capacity charge for the national transmission service related to the capacity booked at exit point u of the national transmission network, expressed in Euro/y/ Sm 3 /d; - Kr is the capacity booked by the user at redelivery point r of the regional transmission network, expressed in Sm 3 /d; - CRr is the national capacity charge for the regional transmission service related to the capacity booked at redelivery point r of the regional transmission network, expressed in Euro/y/ Sm 3 /d; - V is the gas quantity injected into the network, expressed in m 3 ; - CV is the commodity charge, expressed in Euro/m 3. The capacity charges CPe, CPu, CRr are applied to booked capacity independently from its actual utilization, while the commodity charges CV is applied to the actual gas quantities injected into the network in each of the entry point of the national transmission network, excluding entry points interconnected with storage systems. Gas transmission tariff for interruptible transmission service According to the comma 11.1 of the Annex A of Delibera 514/2013/R/GAS ( RTTG ), the interruptible transmission service is made available at entry points interconnected with foreign pipelines and it s subjected to the following charge reductions, defined on the base of cost economies associated to this type of service. For the period from to part of the Thermal Year interruptible service will have the following characteristics: - a 10% reduction of the CPe charge applies to interruptible capacity of first rank; - a 20% reduction of the CPe charge applies to interruptible capacity of second rank; 1

2 - the charge for the interruptible transmission service at the entry point of Vittorio Veneto, to be paid for the whole contractual period, is subject to a 10% reduction and the service is referred to an interruption in absence of a net exit physical flow at the redelivery point of Vittorio Veneto (REMI ). The capacity charges CPu and CRr and the commodity charges CV are the same applied to firm capacity. The table below shows the characteristics of the interruptible service on the basis of which the charges are applied and paid for the whole contractual period. Characteristics of the interruptible transmission service 2

3 For the period from to part of the Thermal Year interruptible service will have the following characteristics: - a % reduction of the CPe charge applies to interruptible capacity; - the charge for the interruptible transmission service at the entry point of Vittorio Veneto, to be paid for the whole contractual period, is subject to a % reduction and the service is referred to an interruption in absence of a net exit physical flow at the redelivery point of Vittorio Veneto (REMI ). The capacity charges CPu and CRr and the commodity charges CV are the same applied to firm capacity. The table below shows the characteristics of the interruptible service on the basis of which the charges are applied and paid for the whole contractual period. Characteristics of the interruptible transmission service Punti di ENTRATA MAZARA DEL VALLO GELA TARVISIO GORIZIA PASSO GRIES Periodo di conferimento della capacità Interr. Totale (Tmax) Interr. Parz. (T1max) Interr. Totale (Tmax) Interr. Parz. (T1max) ANNUALE Durata max interr. (Dmax) Preavviso (Pmin) Trimestre Ottobre-Dicembre TRIMESTRALE Trimestre Gennaio-Marzo Trimestre Aprile-Giugno Trimestre Luglio-Settembre Durata max interr. (Dmax) Preavviso (Pmin) Ottobre Novembre Dicembre Gennaio MENSILE Febbraio Marzo Aprile Maggio Giugno Luglio Agosto Settembre Durata max interr. (Dmax) Preavviso (Pmin) (**) Ore del terzo Giorno Gas precedente a quello d'inizio dell'interruzione 3

4 Gas transmission tariff for firm capacity on infra-annual basis According to the comma 10.1 of RTTG, a firm transmission service is made available at entry points interconnected with foreign pipelines and with regasification terminals on semi-annual, quarterly and monthly basis. The related charges are determined by applying the coefficients shown in the following table to the CPe capacity charges proportioned on monthly basis. Multiplicative coefficients of the charge CPe Yearly 1 Six-month 1,1 Quarterly 1,2 Monthly 1,3 Daily 1,5 4

5 The gas transmission tariffs for year 2016, as approved with Deliberazione 606/20/R/GAS of the Authority for Electricity Gas and Water, are listed in the following tables: TARIFFE TRASPORTO E DISPACCIAMENTO 1 GENNAIO DICEMBRE 2016 Tabella 1.1 Corrispettivi unitari di capacità di rete nazionale Cp e EURO/a/Smc/g EURO/a/Smc/g Mazara del Vallo 3, Falconara 0, Gela 3, Fano 0, Passo Gries 0, Carassai 0, T arvisio 1, Cellino 0, Gorizia 0, Grottammare 0, GNL Panigaglia 0, Montecosaro 0, GNL Cavarzere 0, Pineto 0, GNL OLT Livorno 0, S. Giorgio M. 0, Stoccaggi Stogit / Edison Stoccaggio 0,1861 Capparuccia 0, San Benedetto T. 0, Casteggio 0, Settefinestre/Passatempo 0, Caviaga 0, Fonte Filippo 0, Fornovo 0, Larino 0, Ovanengo 0, Ortona 0, Piadena Ovest 0, Poggiofiorito 0, Pontetidone 0, Cupello 0, Quarto 0, Reggente 0, Rivolta d'adda 0, S. Stefano M. 0, Soresina 0, Candela 0, Trecate 0, Roseto/T. Vulgano 0, Casalborsetti 0, Torrente Tona 0, Collalto 0, Calderasi/Monteverdese 1, Nervesa Della Battaglia 0, Metaponto 1, Medicina 0, Monte Alpi 1, Montenevoso 0, Guardia Perticara 1, Muzza 0, Pisticci A.P./ B.P. 1, Ravenna Mare 0, Sinni (Policoro) 1, Ravenna Mare Lido Adriano 0, Crotone 1, Santerno 0, Hera Lacinia 1, Spilamberto B.P. 0, Bronte 3, Vittorio V. (S. Antonio) 0, Comiso 3, Rubicone 0, Gagliano 3, Mazara/Lippone 3, Noto 3, CP u EURO/a/Smc/g EURO/a/Smc/g NOC - Nord Occidentale 1, Bizzarone 3, NOR - Nord Orientale 1,5027 Gorizia 1, CEN - Centrale 1, Rep. San Marino 3, SOR - Centro-sud Orientale 1, Passo Gries 1, SOC - Centro-sud Occidentale 1,5027 Tarvisio 0, MER - Meridionale 1, Stoccaggi Stogit / Edison Stoccaggio 0, Tabella 1.2 Corrispettivo unitario di capacità di rete regionale unico a livello nazionale CR r unico EURO/a/Smc/g CR r CR D 1, CRr/2+D/*CRr/2 dove 0<D< Tabella 1.3 Corrispettivo unitario variabile CV CV EURO/Smc 0,

6 The percentages to cover own use gas, network gas losses and unaccounted for gas for year 2016, as approved with Delibera 606/20/R/GAS of the Authority for Electricity Gas and Water, are listed in the following table: PERCENTAGES TO COVER OWN USE GAS, NETWORK GAS LOSSES AND UNACCOUNTED FOR GAS 1 st JANUARY ST DECEMBER 2016 Table Percentages to cover own use gas γfuel* Mazara del Vallo 0,608579% Carassai 0,040549% Gela 0,553734% Cellino 0,040549% Passo Gries 0,110596% Grottammare 0,040549% Tarvisio 0,183776% Montecosaro 0,040549% Gorizia 0,127988% Pineto 0,040549% GNL Panigaglia 0,045822% S. Giorgio M. 0,040549% GNL Cavarzere 0,092779% Capparuccia 0,040549% GNL OLT Livorno 0,055978% San Benedetto T. 0,040549% Casteggio 0,014829% Settefinestre/Passatempo 0,040549% Caviaga 0,014829% Fonte Filippo 0,055244% Fornovo 0,014829% Larino 0,055244% Ovanengo 0,014829% Ortona 0,055244% Piadena Ovest 0,014829% Poggiofiorito 0,055244% Pontetidone 0,014829% Cupello 0,055244% Quarto 0,014829% Reggente 0,055244% Rivolta d'adda 0,014829% S. Stefano M. 0,055244% Soresina 0,014829% Candela 0,107536% Trecate 0,014829% Roseto/T. Vulgano 0,107536% Casalborsetti 0,021105% Torrente Tona 0,107536% Collalto 0,021105% Calderasi/Monteverdese 0,212934% Medicina 0,021105% Metaponto 0,212934% Montenevoso 0,021105% Monte Alpi 0,212934% Muzza 0,021105% Guardia Perticara 0,212934% Ravenna Mare 0,021105% Pisticci A.P./ B.P. 0,212934% Ravenna Mare Lido Adriano 0,021105% Sinni (Policoro) 0,212934% Santerno 0,021105% Crotone 0,273976% Spilamberto B.P. 0,021105% Hera Lacinia 0,273976% Vittorio V. (S. Antonio) 0,021105% Bronte 0,512349% Rubicone 0,014829% Comiso 0,512349% Falconara 0,037397% Gagliano 0,512349% Fano 0,037397% Mazara/Lippone 0,512349% Noto 0,512349% * percentages applied to energy injected at the entry point of the national transmission network, not including entry points interconnected with the storage system. Table Percentages to cover network gas losses and unaccounted for gas γgnc* γpe* Redelivery point 0,105814% 0,117567% * percentages applied to energy withdrawal at the redelivery points of the regional transmission network. 6

7 TARIFF FOR METERING SERVICE YEAR st JANUARY 31 st DECEMBER 2016 The tariff for metering service has been calculated according to the provisions of the Delibera 514/2013/R/GAS published on 14 rd November 2013 by the Authority for Electricity Gas and Water. Tariffs for Metering Service for year 2016 The tariff for metering service TM for gas transmission service on annual basis is defined by the following formula: where: TM = Kr * CM T ; - Kr is the capacity booked by the user at redelivery point r of the regional transmission network, expressed in Sm 3 /d; - CM T is the transitory charge for metering service, according to the comma 2.1 of the Delibera 514/2013/R/GAS, for the year 2016, related to the capacity booked at redelivery point r of the regional transmission network, expressed in Euro/y/ Sm 3 /d; The transitory charge CM T for year 2016, as approved with Delibera 606/20/R/GAS of the Authority for Electricity Gas and Water, is listed in the following table: GAS METERING TARIFF 1 st JANUARY st DECEMBER 2016 Table 1.6 Transitory charge for metering service CM T EURO/a/Smc/g CM T 0,

8 NUMERICAL MODEL A shipper has to supply a customer in Milan, with a consumption equal to 2,7 million cubic meter (38,1 MJ/Sm 3 ). The quantities are delivered at the entry point of Tarvisio and re-delivered at the Redelivery point of Milan. For this scope the shipper shall ask the following booking capacities: Entry point of Tarvisio = Sm 3 /d Entry point of Hub storage = Sm 3 /d Exit point = Sm 3 /d Exit point of Hub storage = Sm 3 /d Redelivery point of Milan = Sm 3 /d The charge for transportation capacity is calculated as shown in the following example: Capacity charges for the national transmission network (see tab1.1) see Database Municipalities - Withdrawal Areas Entry Point TARVISIO HUB Storage. Exit point (homogeneous area) NOR - Nord Orientale HUB Storage. Rate CAPACITY Capacity booked Sm 3 /d Capacity booked Sm 3 /d RNG CPe Euro/y/Sm 3 /d 1, ,1861 CPu Euro/y/Sm 3 /d 1,5027 0, Euro Charge Euro 9.344, ,230 + Charge Euro.021, ,314 = ,858 Capacity charges for the regional transmission network (see tab1.2) + Redelivery Point MILAN Rate Distance from RNG km > (see database Redelivery points) CAPACITY Capacity booked Sm 3 /d RRG CRr Euro/y/Sm 3 /d 1, Euro Charge Euro , ,850 Unit Commodity Charge (see tab1.3) + VOLUME Volume per year m Amount to cover Rate AC+Pe+GNC m Commodity m CV Euro/m 3 0, Euro Charge Euro 9.306, ,737 Transmission charges del. 514/2013/R/GAS and del. 606/20/R/GAS = TOTAL Euro ,445 Metering Charge + Redelivery Point MILAN Booking capacity Sm 3 /d Rate metering CM T Euro/y/Sm 3 /d 0, Euro Euro 723, ,140 Transmission charges and Metering Charge del. 514/2013/R/GAS and del. 606/20/R/GAS = TOTAL Euro ,585 8

9 Own use gas, network gas losses and unaccounted for gas OWN USE GAS Own use gas rate Energy injected GJ GJ Percentage at Entry - Tarv % 0, Own use gas rate GJ 189 Network gas losses Network gas losses rate Energy withdrawal GJ GJ Percentage % 0, Network gas losses rate GJ 120 GNC GNC rate Energy withdrawal GJ GJ Percentage % 0, GNC rate GJ = TOTALE GJ 418 9