San Donato Milanese – Maggio 2014

1. New IT platform to manage the Commercial ProcessTechnological Enhancements in B2B integrationintroduced by the New IT Platform Integration Test – Operating Model San Donato Milanese – Maggio 2014 • Only for consultation - not binding

2. Agenda • Objective and scope of the Document • Prerequisites to access to the Test • B2B integration : Integration Test X12 • Approach to testing • Test Book • Operating Details 2 • Only for consultation - not binding

3. Objective and scope of the Dcument • In addition to the exchanged communications (please see the publications on the website), the objective of this document is to provide details about the reference operating model for the Integration Test scheduled for the the Users' certification to use the B2B and X12 protocol . • In particular the document contains: • Approach to Testing • Test Book • Operating Details • Please see also «Technical Specification».doc for further details . 3 • Only for consultation - not binding

4. Prerequisites to access to Integration Test • The Users who wish to continue to use the b2b x12 protocol to send nomination to new system Logistica Gas, must have made and successfully completed the connecting test via https channel (test scheduled for last June) • For users who don't have completed this test before June 30th, 2014, were scheduled recovery sessions during Integration X12 Test Itself. SRG will provide to each Shipper the date of the relative. • To access the Integration Test phase dedicated to users who want to use the X12 protocol to communicate in the new system (designed test to the correct communication between the User's system and LG system for the B2B X12 protocol and the specific messages: 850, 997 and 855) please register and confirm the participation to tests before and not later than July 15th,2014sending mail to LogisticaGas.support@snamretegas.it 4 • Only for consultation - not binding

5. Integration Test – Approccio ai test • The approach used involves assigning each user to a specific time slot for the execution of the Integration test (as indicated in the file Calendario_IT.xls published on the website with this document) • Each User shall independently perform all the test cases listed in the test book one time ended the test will have to send an acknowledgment to LogisticaGas.support@snamretegas.it(for details on how to fill in the test book and the mail to send, please, see the next slides) • In case of failure to complete the test on the scheduled closing date will be provided two recovery sessions (back-up) in the queue to Calendar. • Reference time slot (for each slot assigned): • morning: from 9.30 to 12.30; • afternoon: from 14.00 to 17.00 5 • Only for consultation - not binding

6. Integration Test – Test Book (1/2) • In the «Technical Specifications» (see paragraph "Test Book Integration Test") reports the Test Book containing the test cases subject of the Integration Test . • In particular the test cases are dividedintotwomainareas: • Sending X12 Nominations • Exception Handling • The Test Book contains : • Sections precompiled inclusive the instructions to support the test cases execution(please see: Test Case Id, Test Cases Name, Test Case Description, Step Description, Expected Result, ...) • Sections that each user has to fill in order to report details on the execution of the individual test cases and their outcome, as shown to follow 6 • Only for consultation - not binding

7. Integration Test – Test Book (2/2) • During the execution of the Integration Test, for each test case, the user has to fill in the cell in the column «Risultato Ottenuto», «Stato Test Step», «Sistema» e «Data Esecuzione» (see Figure .1) by following the instructions contained therein. • For instance, with reference to the first test case : «ID_850_997_855_Trasmissione Nomine X12 con capacità», the user will fill in the cells E11, F11, G11 and H11 overwriting the instructions for filling in contained therein. Following the example of the contents after the User has filled in the cells: • E11 = KO (descrizione problema) • F11 = Fallito • G11 = Ragione sociale Utente • H11 = 25/07/2014 Fig.1 Estratto test Book – Colonne che l’Utente deve popolare 7 • Only for consultation - not binding

8. Contacts • Please look over this document and the content integrated in the technical specifications recently published (including Test Book.xls embedded) and necessary to startup phase of Integration Test scheduled for July 21th. • Please send us any requests for clarification within July 15th to the following address: LogisticaGas.support@snamretegas.it 8 • Only for consultation - not binding