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MMRC Sariput Nagar Electrical Substation in Mumbai is India's first metro substation project to achieve the prestigious IGBC Platinum rating. Mumbai Metro Rail Corporation (MMRC) exemplifies a strong commitment to sustainability within the infrastructure development sector. This dedication is evident in MMRC鈥檚 initiation of a series of green building projects, emphasising its dedication to environmental stewardship. A notable representation of this commitment is the MMRC Sariput Nagar Electrical Substation located in Mumbai. To achieve the objective of designing and constructing a green building, Larson & Toubro (L&T), the EPC contractor and PEC Greening India, a green building consultant, were engaged from the planning stage. MMRC embraced a holistic approach to creating a green building. With a built-up area covering less than 3,000 sq m, this small-scale project proves that even compact endeavours can make significant strides toward sustainability. As Dr Mala Singh, Founder and Director, PEC Greening India, says, 鈥淪mall projects can also 鈥楪o Green鈥�.鈥� What鈥檚 more, the project is India鈥檚 first metro substation to achieve the prestigious IGBC Platinum rating. What sets the MMRC Sariput Nagar substation apart is its unwavering emphasis on sustainability, embedded in every facet of its design and execution. The commitment to environmental stewardship ranges from innovative sustainable site planning and design to cutting-edge solutions in energy and water-efficiency. Further, it extends to the meticulous handling of waste management and the deliberate selection of sustainable building materials. This project proudly embodies the idea that even the smallest endeavours can lead the way in constructing a greener and more sustainable tomorrow. This substation is a resounding testament to the transformative power of sustainable practices within the construction industry. Dr Singh shares the key sustainability measures that have led to the project achieving the green rating鈥�. Prioritising sustainable design elements The project places a strong focus on sustainable design aspects, including optimal project orientation to minimise heat gain and maximise natural ventilation. Further, it extensively uses natural daylight to reduce the need for artificial lighting. Also, to combat the heat island effect, the project dedicates increased space to landscaping, with a preference for local and native trees. Notably, an innovative green wall, constructed using recycled water bottles, augments the green cover of the substation. Efficient water management The project actively promotes water conservation through several initiatives. This includes the installation of water-efficient fixtures with a low flow rate, resulting in a 38 per cent reduction in water usage compared to the baseline. Moreover, a 1.2 kld sewage treatment plant (STP) is put in place to treat 100 per cent of the wastewater generated. To harness rainwater, a 25 kld rainwater harvesting tank is installed, ensuring that 100 per cent of rainwater runoff is captured. Adequate stormwater management systems are designed for the site and the installation of water meters and submeters helps monitor water consumption effectively. Maximising energy-efficiency Energy conservation has been a top priority, with the project implementing various measures to minimise energy usage. These measures included installing a 20 kw solar PV system on the rooftop, 100 per cent energy-efficient LED lighting throughout the interior and exterior areas and an energy-efficient HVAC system. The building envelope has been optimised, featuring AAC blocks in walls and low E glass in windows. Additionally, energy meters and submeters are deployed to monitor energy consumption accurately. Holistic green practices Several other green and sustainability measures are incorporated into the project. These include the use of eco-friendly refrigerants, efficient waste management through the use of waste bins for proper waste segregation and disposal, EV charging stations in parking areas, the use of Green PRO-certified products in construction and the display of green education signage to create awareness among users.-SHRIYAL SETHUMADHAVAN Project name: Mumbai Metro Line 3, Sariput Nagar 110 kV/33-25 kV Receiving Substation (RSS) Location: Sariput Nagar, JVLR, Goregaon, Mumbai-400065, Maharashtra Project built-up area (sq m): 2,908 Developer: Mumbai Metro Rail Corporation EPC contractor: Larsen & Toubro Green building consultant: PEC Solutions Green Designs