75 Sustainabi l i ty Sect ion 03 Annual Report 2022 SUSTA INAB I L I TY STATEMENT Date Issue Action 20, 21, 23, 26 January 2022 LRA Sultan Ismail shutdown due to increase in ammonia Raw water source: Sungai Skudai Root cause: Ammonia release from STP and effluent from factory BAKAJ and SPAN have been notified and further action taken 26 May 2022 LRA Kg Tengah 1, Kg Tengah 2 & Bukit Hampar Raw water source: Sungai Segamat Root cause: Palm oil plantation effluent overflow BAKAJ have been notified and further action taken by BAKAJ 27 December 2022 Bukit Batu WTP shutdown due to increase of ammonia at plant intake Raw water source: Sungai Ulu Pontian Besar Root cause: Palm oil plantation fertilizer illegal dumping BAKAJ have been notified and further action taken by BAKAJ Ranhill SAJ as a private water operator only starts at the intake; that is ensuring the quality of raw water supplied to domestic and non-domestic customers. The responsibility of ensuring the quality and quantity of river water supply rests with other stakeholders within the ecosystem. However, Ranhill SAJ at the cost of RM7 million has deployed a PRS at the Simpang Renggam WTP to reduce ammonia levels to below 10 ppm. Ranhill SAJ has in the past, increased the volume of raw water transfer from rivers to designated dams. Example of this includes the water transfer activities from Tasik Biru and Chabang Tiram River to the Upper Layang Dam. In FY2022, an additional raw water transfer project, the Sg Ulu Sedili Besar project was given priority. The project once completed will enable 18 MLD of raw water from Sg Sedili to be channelled to the Gembut WTP to meet growing consumption demand from the Gembut area. Aside from ensuring sufficient supply, the raw water transfer activities are important to preserve oxygen levels in the water. Higher water levels in dam means larger water surface areas which increase the oxygen levels. Monitoring Human Machine Interface (HMI) in control system for ammonia removal process at PRS Simpang Renggam WTP, Johor The raw water for the Sg Layang WTP is extracted from the Tasik Biru as contigency plan to maintain water level at Upper Layang Dam
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