Water and Effluent Management

Water and Effluents Management

103-303; 303-01; 303-02; 303-03; 303-04; 303-05

The conscious use of natural resources is a guideline of MRV&CO’S Sustainability Policy. Water Consumption and Waste Generation are highlights.

The water management process is similar to energy management and integrates CLIMAS and SAP. The water consumption is estimated in cubic meters, calculated from the monetary value. We are now developing a process to collect water bill data in m³ for greater accuracy. MRV&CO primarily uses water through public utilities concessionaires via supply networks. This includes construction sites, which concentrate the highest consumption levels in the construction processes. Crucial objectives for construction site management involve reducing

the volume and promoting the conscious use of water while

focusing on reuse – which also contributes to generating fewer

effluents.

Water reuse on construction sites

To reduce the use of potable water, the most relevant practices in construction works are:

• Recycling grey water from washbasins in changing rooms for reuse in toilet flushing system through a gravity device that allows the water to flow;

• Recycling grey water for reuse in cleaning equipment and floors from water used for cleaning concrete mixers after decanting and filtering impurities;

• The rainwater collected from the roof of the temporary offices at construction sites is used to wash equipment, clean areas, and irrigate gardens. The same can be done with the water expelled by the air conditioning systems

Water disposal

We are also attentive to this step: we have established effluent control systems, such as decanters used for concrete mixer washing water and the wastewater treatment system at construction sites not served by the sewage system. These structures adopt the standards outlined by the applicable local legislations and conform to internal procedures and regulations to ensure the best adherence of our operation to the norms

Water efficiency

To increase water efficiency, MRV&CO developments count on:

• Saving devices, such as dual-flush toilets and flow restrictors in faucets.

• Rainwater retention and/or infiltration.

• Individualized home water sub-meters.

Water stress

The Aqueduct, which is WWF and WRI’s climate risk analysis software, is the tool applied to analyze scenarios and identify potentially water-stressed areas where MRV&CO. Current indicators point to the states of Bahia, Ceará and São Paulo, considering a total consumption of 478,000 cubic meters in the projects developed in these states.

1,000 (m3) 2019 2020 2021 var. 2019/2020 var. 2020/2021

Water acquisition 2.092,35 2.863,06 2.927,22 +36,8% +2,2%

We always keep an attentive eye: MRV&CO monitors water consumption and has set out a 2% reduction goal or more compared to the previous year.

Effluents

Effluent discharge from MRV&CO developments is collected by the public sewage system or sent to septic tanks/filters, sewage treatment plants, decantation tanks, or other treatment systems compatible with the local structure.

• As for the liquid effluents discharged into the sewage system, the minimum standards provided for by Brazilian law are monitored.

• In the case of sanitary wastewater to be discharged after treatment, the monitoring follows the parameters laid down by the most restrictive environmental legal requirement (environmental factors, applicable laws, among others). In 2021, we started to measure the volume of effluents discharged by adopting

environmental requirements. In the absence of these, we comply with the standards of the most restrictive applicable legislation. The discharge of

effluents has been estimated at 80% of the total volume of water purchased.

1,000 (m3) Purchased Discharge Consumption

2021 2.927,22 2.341,78 585,44

Even if there is no applicable legislation for the place or situation, monitoring always takes place. The discharge of effluents directly into a water body is not a MRV&CO practice.

Urba

In 2021, 5,000 m³ of groundwater were captured via artesian wells and 3,024 m³ via third parties from water tankers. We must highlight that no activities were carried out in water-stressed areas.

Effluent disposal is operated according to state decrees and legislation when discharged into bodies of water. Disposal into septic tanks is implemented by qualified outsourced manpower, considering the issuance of a Waste Transport Manifest (MTR) upon cleaning and removal of sludge.