7.1. Maintenance

March 20, 2025: Suspension of storage service for HD-measurement - appointment confirmation
Following the previous notice and based on Article 22, paragraph 4 of the Rules for the use of the gas storage system, we confirm that the storage service at the Okoli warehouse will be suspended in order to perform HD measurements in the period from March 25, 2025 at 06:00 a.m. to March 29, 2025 at 06:00 a.m.

March 10, 2025: Suspension of provision of storage service for HD measurement - revised plan
In order to carry out the regular annual HD-measurement of PSP Okoli boreholes, and in accordance with Art. 22, paragraph 4 of the Rules for the use of the gas storage system, we are announcing the revised plan for the suspension of gas storage services from March 25, 2025 at 6:00 a.m. to March 29, 2025 at 6:00 a.m. for a duration of 96 hours.
We will announce the final confirmation of the exact date of suspension of operation of the Okoli Underground Gas Storage at least 44 hours before the planned shutdown.

February 19, 2025: Suspension of provision of storage service for HD-measurement
In order to perform regular annual HD measurements at the end of the withdrawal cycle, and in accordance with Art. 22 par. 4 of the Rules for the use of the gas storage system, the planned downtime of the plant for 96 hours is from March 18, 2025 at 6:00 a.m. to March 22, 2025 at 06:00 a.m.
We will announce the final confirmation of the exact date of suspension of operation of the Okoli Underground Gas Storage at least 44 hours before the shutdown.

Planned procedures which impact the use of the Gas Storage System's capacities:

Annual maintenance plan of the Gas Storage for 2025 - 2026

MONTH	MAINTENANCE LOCATION	DURATION TIME (h)	ACTIVITY
APRIL	no maintenance work is planned on the gas storage system
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER	Wells PSP Okoli	96	regular annual hydrodynamic measurement at the end of the gas injection cycle
NOVEMBER	no maintenance work is planned on the gas storage system
DECEMBER
JANUARY
FEBRUARY
MARCH	Wells PSP Okoli	96	regular annual hydrodynamic measurement at the end of the gas withdrawal cycle

REMARK:
The annual maintenance plan of the gas storage system refers to the activities of the development, construction and maintenance of the gas storage system and the dates for the execution of the activities are indicative. The planned dates for the performance of activities and the duration of the out of operation and/or restrictions in operation will be confirmed 44 hours before the start of the planned activities on the website of the Underground Gas Storage Ltd. (https://www.psp.hr/).

Hydrodynamic (HD) measurements in the underground gas storage deposit: withdrawal capacity 0 m3/h and injection capacity 0 m3/h with a constant duration of up to 96 hours.HD measurements are planned to be carried out no later than 15 days from the end of the injection cycle or rather the withdrawal cycle of which the users will be notified at least 44 hours in advance.
Annual maintenance work on the motorcompressor units: in the time period from the 1st of November until 1st of April injection capacity up to Qut ≤ 80,000 m3/h gas.
The Storage System Operator revises as required the planned gas storage service termination deadlines and finally confirms them by delivering a notification to the Storage System Users at least 44 hours in advance.
Other notifications which can have an impact onthe use of Gas Storage System's capacities can be seen on the web site Operational Data.